mirror of
http://git.whoc.org.uk/git/password-manager.git
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789 lines
22 KiB
JavaScript
789 lines
22 KiB
JavaScript
/***
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MochiKit.Iter 1.5
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See <http://mochikit.com/> for documentation, downloads, license, etc.
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(c) 2005 Bob Ippolito. All rights Reserved.
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***/
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MochiKit.Base.module(MochiKit, 'Iter', '1.5', ['Base']);
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MochiKit.Base.update(MochiKit.Iter, {
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/** @id MochiKit.Iter.registerIteratorFactory */
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registerIteratorFactory: function (name, check, iterfactory, /* optional */ override) {
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MochiKit.Iter.iteratorRegistry.register(name, check, iterfactory, override);
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},
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/** @id MochiKit.Iter.isIterable */
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isIterable: function(o) {
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return o != null &&
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(typeof(o.next) == "function" || typeof(o.iter) == "function");
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},
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/** @id MochiKit.Iter.iter */
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iter: function (iterable, /* optional */ sentinel) {
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var self = MochiKit.Iter;
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if (arguments.length == 2) {
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return self.takewhile(
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function (a) { return a != sentinel; },
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iterable
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);
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}
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if (typeof(iterable.next) == 'function') {
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return iterable;
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} else if (typeof(iterable.iter) == 'function') {
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return iterable.iter();
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/*
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} else if (typeof(iterable.__iterator__) == 'function') {
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//
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// XXX: We can't support JavaScript 1.7 __iterator__ directly
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// because of Object.prototype.__iterator__
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//
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return iterable.__iterator__();
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*/
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}
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try {
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return self.iteratorRegistry.match(iterable);
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} catch (e) {
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var m = MochiKit.Base;
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if (e == m.NotFound) {
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e = new TypeError(typeof(iterable) + ": " + m.repr(iterable) + " is not iterable");
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}
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throw e;
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}
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},
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/** @id MochiKit.Iter.count */
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count: function (n) {
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if (!n) {
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n = 0;
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}
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var m = MochiKit.Base;
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return {
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repr: function () { return "count(" + n + ")"; },
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toString: m.forwardCall("repr"),
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next: m.counter(n)
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};
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},
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/** @id MochiKit.Iter.cycle */
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cycle: function (p) {
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var self = MochiKit.Iter;
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var m = MochiKit.Base;
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var lst = [];
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var iterator = self.iter(p);
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return {
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repr: function () { return "cycle(...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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try {
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var rval = iterator.next();
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lst.push(rval);
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return rval;
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} catch (e) {
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if (e != self.StopIteration) {
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throw e;
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}
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if (lst.length === 0) {
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this.next = function () {
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throw self.StopIteration;
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};
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} else {
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var i = -1;
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this.next = function () {
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i = (i + 1) % lst.length;
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return lst[i];
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};
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}
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return this.next();
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}
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}
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};
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},
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/** @id MochiKit.Iter.repeat */
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repeat: function (elem, /* optional */n) {
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var m = MochiKit.Base;
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if (typeof(n) == 'undefined') {
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return {
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repr: function () {
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return "repeat(" + m.repr(elem) + ")";
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},
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toString: m.forwardCall("repr"),
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next: function () {
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return elem;
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}
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};
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}
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return {
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repr: function () {
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return "repeat(" + m.repr(elem) + ", " + n + ")";
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},
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toString: m.forwardCall("repr"),
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next: function () {
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if (n <= 0) {
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throw MochiKit.Iter.StopIteration;
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}
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n -= 1;
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return elem;
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}
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};
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},
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/** @id MochiKit.Iter.next */
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next: function (iterator) {
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return iterator.next();
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},
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/** @id MochiKit.Iter.izip */
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izip: function (p, q/*, ...*/) {
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var m = MochiKit.Base;
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var self = MochiKit.Iter;
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var next = self.next;
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var iterables = m.map(self.iter, arguments);
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return {
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repr: function () { return "izip(...)"; },
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toString: m.forwardCall("repr"),
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next: function () { return m.map(next, iterables); }
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};
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},
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/** @id MochiKit.Iter.ifilter */
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ifilter: function (pred, seq) {
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var m = MochiKit.Base;
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seq = MochiKit.Iter.iter(seq);
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if (pred === null) {
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pred = m.operator.truth;
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}
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return {
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repr: function () { return "ifilter(...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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while (true) {
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var rval = seq.next();
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if (pred(rval)) {
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return rval;
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}
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}
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// mozilla warnings aren't too bright
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return undefined;
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}
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};
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},
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/** @id MochiKit.Iter.ifilterfalse */
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ifilterfalse: function (pred, seq) {
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var m = MochiKit.Base;
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seq = MochiKit.Iter.iter(seq);
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if (pred === null) {
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pred = m.operator.truth;
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}
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return {
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repr: function () { return "ifilterfalse(...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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while (true) {
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var rval = seq.next();
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if (!pred(rval)) {
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return rval;
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}
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}
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// mozilla warnings aren't too bright
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return undefined;
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}
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};
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},
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/** @id MochiKit.Iter.islice */
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islice: function (seq/*, [start,] stop[, step] */) {
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var self = MochiKit.Iter;
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var m = MochiKit.Base;
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seq = self.iter(seq);
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var start = 0;
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var stop = 0;
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var step = 1;
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var i = -1;
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if (arguments.length == 2) {
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stop = arguments[1];
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} else if (arguments.length == 3) {
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start = arguments[1];
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stop = arguments[2];
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} else {
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start = arguments[1];
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stop = arguments[2];
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step = arguments[3];
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}
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return {
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repr: function () {
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return "islice(" + ["...", start, stop, step].join(", ") + ")";
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},
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toString: m.forwardCall("repr"),
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next: function () {
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if (start >= stop) {
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throw self.StopIteration;
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}
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var rval;
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while (i < start) {
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rval = seq.next();
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i++;
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}
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start += step;
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return rval;
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}
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};
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},
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/** @id MochiKit.Iter.imap */
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imap: function (fun, p, q/*, ...*/) {
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var m = MochiKit.Base;
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var self = MochiKit.Iter;
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var iterables = m.map(self.iter, m.extend(null, arguments, 1));
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var map = m.map;
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var next = self.next;
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return {
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repr: function () { return "imap(...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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return fun.apply(this, map(next, iterables));
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}
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};
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},
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/** @id MochiKit.Iter.applymap */
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applymap: function (fun, seq, self) {
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seq = MochiKit.Iter.iter(seq);
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var m = MochiKit.Base;
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return {
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repr: function () { return "applymap(...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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return fun.apply(self, seq.next());
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}
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};
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},
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/** @id MochiKit.Iter.chain */
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chain: function (p, q/*, ...*/) {
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// dumb fast path
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var self = MochiKit.Iter;
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var m = MochiKit.Base;
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if (arguments.length == 1) {
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return self.iter(arguments[0]);
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}
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var argiter = m.map(self.iter, arguments);
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return {
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repr: function () { return "chain(...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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while (argiter.length > 1) {
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try {
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return argiter[0].next();
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} catch (e) {
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if (e != self.StopIteration) {
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throw e;
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}
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argiter.shift();
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}
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}
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if (argiter.length == 1) {
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// optimize last element
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var arg = argiter.shift();
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this.next = m.bind("next", arg);
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return this.next();
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}
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throw self.StopIteration;
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}
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};
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},
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/** @id MochiKit.Iter.takewhile */
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takewhile: function (pred, seq) {
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var self = MochiKit.Iter;
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seq = self.iter(seq);
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return {
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repr: function () { return "takewhile(...)"; },
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toString: MochiKit.Base.forwardCall("repr"),
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next: function () {
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var rval = seq.next();
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if (!pred(rval)) {
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this.next = function () {
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throw self.StopIteration;
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};
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this.next();
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}
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return rval;
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}
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};
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},
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/** @id MochiKit.Iter.dropwhile */
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dropwhile: function (pred, seq) {
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seq = MochiKit.Iter.iter(seq);
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var m = MochiKit.Base;
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var bind = m.bind;
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return {
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"repr": function () { return "dropwhile(...)"; },
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"toString": m.forwardCall("repr"),
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"next": function () {
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while (true) {
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var rval = seq.next();
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if (!pred(rval)) {
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break;
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}
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}
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this.next = bind("next", seq);
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return rval;
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}
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};
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},
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_tee: function (ident, sync, iterable) {
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sync.pos[ident] = -1;
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var m = MochiKit.Base;
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var listMin = m.listMin;
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return {
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repr: function () { return "tee(" + ident + ", ...)"; },
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toString: m.forwardCall("repr"),
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next: function () {
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var rval;
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var i = sync.pos[ident];
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if (i == sync.max) {
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rval = iterable.next();
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sync.deque.push(rval);
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sync.max += 1;
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sync.pos[ident] += 1;
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} else {
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rval = sync.deque[i - sync.min];
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sync.pos[ident] += 1;
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if (i == sync.min && listMin(sync.pos) != sync.min) {
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sync.min += 1;
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sync.deque.shift();
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}
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}
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return rval;
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}
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};
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},
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/** @id MochiKit.Iter.tee */
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tee: function (iterable, n/* = 2 */) {
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var rval = [];
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var sync = {
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"pos": [],
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"deque": [],
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"max": -1,
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"min": -1
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};
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if (arguments.length == 1 || typeof(n) == "undefined" || n === null) {
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n = 2;
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}
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var self = MochiKit.Iter;
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iterable = self.iter(iterable);
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var _tee = self._tee;
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for (var i = 0; i < n; i++) {
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rval.push(_tee(i, sync, iterable));
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}
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return rval;
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},
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/** @id MochiKit.Iter.list */
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list: function (iterable) {
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// Fast-path for Array and Array-like
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var rval;
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if (iterable instanceof Array) {
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return iterable.slice();
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}
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// this is necessary to avoid a Safari crash
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if (typeof(iterable) == "function" &&
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!(iterable instanceof Function) &&
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typeof(iterable.length) == 'number') {
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rval = [];
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for (var i = 0; i < iterable.length; i++) {
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rval.push(iterable[i]);
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}
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return rval;
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}
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var self = MochiKit.Iter;
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iterable = self.iter(iterable);
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rval = [];
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var a_val;
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try {
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while (true) {
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a_val = iterable.next();
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rval.push(a_val);
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}
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} catch (e) {
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if (e != self.StopIteration) {
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throw e;
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}
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return rval;
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}
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// mozilla warnings aren't too bright
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return undefined;
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},
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/** @id MochiKit.Iter.reduce */
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reduce: function (fn, iterable, /* optional */initial) {
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var i = 0;
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var x = initial;
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var self = MochiKit.Iter;
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iterable = self.iter(iterable);
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if (arguments.length < 3) {
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try {
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x = iterable.next();
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} catch (e) {
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if (e == self.StopIteration) {
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e = new TypeError("reduce() of empty sequence with no initial value");
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}
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throw e;
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}
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i++;
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}
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try {
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while (true) {
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x = fn(x, iterable.next());
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}
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} catch (e) {
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if (e != self.StopIteration) {
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throw e;
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}
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}
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return x;
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},
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/** @id MochiKit.Iter.range */
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range: function (/* [start,] stop[, step] */) {
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var start = 0;
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var stop = 0;
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var step = 1;
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if (arguments.length == 1) {
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stop = arguments[0];
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} else if (arguments.length == 2) {
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start = arguments[0];
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stop = arguments[1];
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} else if (arguments.length == 3) {
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start = arguments[0];
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stop = arguments[1];
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step = arguments[2];
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} else {
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throw new TypeError("range() takes 1, 2, or 3 arguments!");
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}
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if (step === 0) {
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throw new TypeError("range() step must not be 0");
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}
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return {
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next: function () {
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if ((step > 0 && start >= stop) || (step < 0 && start <= stop)) {
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throw MochiKit.Iter.StopIteration;
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}
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var rval = start;
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start += step;
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return rval;
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},
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repr: function () {
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return "range(" + [start, stop, step].join(", ") + ")";
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},
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toString: MochiKit.Base.forwardCall("repr")
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};
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},
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/** @id MochiKit.Iter.sum */
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sum: function (iterable, start/* = 0 */) {
|
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if (typeof(start) == "undefined" || start === null) {
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start = 0;
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}
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var x = start;
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var self = MochiKit.Iter;
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iterable = self.iter(iterable);
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try {
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while (true) {
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x += iterable.next();
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}
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} catch (e) {
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if (e != self.StopIteration) {
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throw e;
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}
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}
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return x;
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},
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/** @id MochiKit.Iter.exhaust */
|
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exhaust: function (iterable) {
|
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var self = MochiKit.Iter;
|
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iterable = self.iter(iterable);
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try {
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while (true) {
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iterable.next();
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}
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} catch (e) {
|
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if (e != self.StopIteration) {
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throw e;
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}
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}
|
|
},
|
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|
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/** @id MochiKit.Iter.forEach */
|
|
forEach: function (iterable, func, /* optional */obj) {
|
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var m = MochiKit.Base;
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var self = MochiKit.Iter;
|
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if (arguments.length > 2) {
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func = m.bind(func, obj);
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}
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|
// fast path for array
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if (m.isArrayLike(iterable) && !self.isIterable(iterable)) {
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try {
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for (var i = 0; i < iterable.length; i++) {
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func(iterable[i]);
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}
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|
} catch (e) {
|
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if (e != self.StopIteration) {
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throw e;
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}
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}
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} else {
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self.exhaust(self.imap(func, iterable));
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}
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},
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/** @id MochiKit.Iter.every */
|
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every: function (iterable, func) {
|
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var self = MochiKit.Iter;
|
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try {
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self.ifilterfalse(func, iterable).next();
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return false;
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} catch (e) {
|
|
if (e != self.StopIteration) {
|
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throw e;
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}
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return true;
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}
|
|
},
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|
|
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/** @id MochiKit.Iter.sorted */
|
|
sorted: function (iterable, /* optional */cmp) {
|
|
var rval = MochiKit.Iter.list(iterable);
|
|
if (arguments.length == 1) {
|
|
cmp = MochiKit.Base.compare;
|
|
}
|
|
rval.sort(cmp);
|
|
return rval;
|
|
},
|
|
|
|
/** @id MochiKit.Iter.reversed */
|
|
reversed: function (iterable) {
|
|
var rval = MochiKit.Iter.list(iterable);
|
|
rval.reverse();
|
|
return rval;
|
|
},
|
|
|
|
/** @id MochiKit.Iter.some */
|
|
some: function (iterable, func) {
|
|
var self = MochiKit.Iter;
|
|
try {
|
|
self.ifilter(func, iterable).next();
|
|
return true;
|
|
} catch (e) {
|
|
if (e != self.StopIteration) {
|
|
throw e;
|
|
}
|
|
return false;
|
|
}
|
|
},
|
|
|
|
/** @id MochiKit.Iter.iextend */
|
|
iextend: function (lst, iterable) {
|
|
var m = MochiKit.Base;
|
|
var self = MochiKit.Iter;
|
|
if (m.isArrayLike(iterable) && !self.isIterable(iterable)) {
|
|
// fast-path for array-like
|
|
for (var i = 0; i < iterable.length; i++) {
|
|
lst.push(iterable[i]);
|
|
}
|
|
} else {
|
|
iterable = self.iter(iterable);
|
|
try {
|
|
while (true) {
|
|
lst.push(iterable.next());
|
|
}
|
|
} catch (e) {
|
|
if (e != self.StopIteration) {
|
|
throw e;
|
|
}
|
|
}
|
|
}
|
|
return lst;
|
|
},
|
|
|
|
/** @id MochiKit.Iter.groupby */
|
|
groupby: function(iterable, /* optional */ keyfunc) {
|
|
var m = MochiKit.Base;
|
|
var self = MochiKit.Iter;
|
|
if (arguments.length < 2) {
|
|
keyfunc = m.operator.identity;
|
|
}
|
|
iterable = self.iter(iterable);
|
|
|
|
// shared
|
|
var pk = undefined;
|
|
var k = undefined;
|
|
var v;
|
|
|
|
function fetch() {
|
|
v = iterable.next();
|
|
k = keyfunc(v);
|
|
};
|
|
|
|
function eat() {
|
|
var ret = v;
|
|
v = undefined;
|
|
return ret;
|
|
};
|
|
|
|
var first = true;
|
|
var compare = m.compare;
|
|
return {
|
|
repr: function () { return "groupby(...)"; },
|
|
next: function() {
|
|
// iterator-next
|
|
|
|
// iterate until meet next group
|
|
while (compare(k, pk) === 0) {
|
|
fetch();
|
|
if (first) {
|
|
first = false;
|
|
break;
|
|
}
|
|
}
|
|
pk = k;
|
|
return [k, {
|
|
next: function() {
|
|
// subiterator-next
|
|
if (v == undefined) { // Is there something to eat?
|
|
fetch();
|
|
}
|
|
if (compare(k, pk) !== 0) {
|
|
throw self.StopIteration;
|
|
}
|
|
return eat();
|
|
}
|
|
}];
|
|
}
|
|
};
|
|
},
|
|
|
|
/** @id MochiKit.Iter.groupby_as_array */
|
|
groupby_as_array: function (iterable, /* optional */ keyfunc) {
|
|
var m = MochiKit.Base;
|
|
var self = MochiKit.Iter;
|
|
if (arguments.length < 2) {
|
|
keyfunc = m.operator.identity;
|
|
}
|
|
|
|
iterable = self.iter(iterable);
|
|
var result = [];
|
|
var first = true;
|
|
var prev_key;
|
|
var compare = m.compare;
|
|
while (true) {
|
|
try {
|
|
var value = iterable.next();
|
|
var key = keyfunc(value);
|
|
} catch (e) {
|
|
if (e == self.StopIteration) {
|
|
break;
|
|
}
|
|
throw e;
|
|
}
|
|
if (first || compare(key, prev_key) !== 0) {
|
|
var values = [];
|
|
result.push([key, values]);
|
|
}
|
|
values.push(value);
|
|
first = false;
|
|
prev_key = key;
|
|
}
|
|
return result;
|
|
},
|
|
|
|
/** @id MochiKit.Iter.arrayLikeIter */
|
|
arrayLikeIter: function (iterable) {
|
|
var i = 0;
|
|
return {
|
|
repr: function () { return "arrayLikeIter(...)"; },
|
|
toString: MochiKit.Base.forwardCall("repr"),
|
|
next: function () {
|
|
if (i >= iterable.length) {
|
|
throw MochiKit.Iter.StopIteration;
|
|
}
|
|
return iterable[i++];
|
|
}
|
|
};
|
|
},
|
|
|
|
/** @id MochiKit.Iter.hasIterateNext */
|
|
hasIterateNext: function (iterable) {
|
|
return (iterable && typeof(iterable.iterateNext) == "function");
|
|
},
|
|
|
|
/** @id MochiKit.Iter.iterateNextIter */
|
|
iterateNextIter: function (iterable) {
|
|
return {
|
|
repr: function () { return "iterateNextIter(...)"; },
|
|
toString: MochiKit.Base.forwardCall("repr"),
|
|
next: function () {
|
|
var rval = iterable.iterateNext();
|
|
if (rval === null || rval === undefined) {
|
|
throw MochiKit.Iter.StopIteration;
|
|
}
|
|
return rval;
|
|
}
|
|
};
|
|
}
|
|
});
|
|
|
|
|
|
MochiKit.Iter.__new__ = function () {
|
|
var m = MochiKit.Base;
|
|
// Re-use StopIteration if exists (e.g. SpiderMonkey)
|
|
if (typeof(StopIteration) != "undefined") {
|
|
this.StopIteration = StopIteration;
|
|
} else {
|
|
/** @id MochiKit.Iter.StopIteration */
|
|
this.StopIteration = new m.NamedError("StopIteration");
|
|
}
|
|
this.iteratorRegistry = new m.AdapterRegistry();
|
|
// Register the iterator factory for arrays
|
|
this.registerIteratorFactory(
|
|
"arrayLike",
|
|
m.isArrayLike,
|
|
this.arrayLikeIter
|
|
);
|
|
|
|
this.registerIteratorFactory(
|
|
"iterateNext",
|
|
this.hasIterateNext,
|
|
this.iterateNextIter
|
|
);
|
|
|
|
m.nameFunctions(this);
|
|
|
|
};
|
|
|
|
MochiKit.Iter.__new__();
|
|
|
|
//
|
|
// XXX: Internet Explorer blows
|
|
//
|
|
if (MochiKit.__export__) {
|
|
reduce = MochiKit.Iter.reduce;
|
|
}
|
|
|
|
MochiKit.Base._exportSymbols(this, MochiKit.Iter);
|