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Merge branch 'master' of git://github.com/DmitryBaranovskiy/underscore

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kriskowal
2009-10-28 17:15:01 -07:00
parent 79c4c992d8 df2742de17
commit 9187fb30b3
1 changed files with 22 additions and 24 deletions
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46
underscore.js
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@@ -26,12 +26,12 @@
if (obj.forEach) {
obj.forEach(iterator, context);
} else if (obj.length) {
for (var i=0; i<obj.length; i++) iterator.call(context, obj[i], i);
for (var i=0, ii = obj.length; i<ii; i++) iterator.call(context, obj[i], i);
} else if (obj.each) {
obj.each(function(value) { iterator.call(context, value, index++); });
} else {
var i = 0;
for (var key in obj) {
for (var key in obj) if (obj.hasOwnProperty(key)) {
var value = obj[key], pair = [key, value];
pair.key = key;
pair.value = value;
@@ -44,7 +44,7 @@
return obj;
};
// Return the results of applying the iterator to each element. Use Javascript
// Return the results of applying the iterator to each element. Use JavaScript
// 1.6's version of map, if possible.
_.map = function(obj, iterator, context) {
if (obj && obj.map) return obj.map(iterator, context);
@@ -76,13 +76,13 @@
return result;
};
// Return all the elements that pass a truth test. Use Javascript 1.6's
// Return all the elements that pass a truth test. Use JavaScript 1.6's
// filter(), if it exists.
_.select = function(obj, iterator, context) {
if (obj.filter) return obj.filter(iterator, context);
var results = [];
_.each(obj, function(value, index) {
if (iterator.call(context, value, index)) results.push(value);
iterator.call(context, value, index) && results.push(value);
});
return results;
};
@@ -91,32 +91,30 @@
_.reject = function(obj, iterator, context) {
var results = [];
_.each(obj, function(value, index) {
if (!iterator.call(context, value, index)) results.push(value);
!iterator.call(context, value, index) && results.push(value);
});
return results;
};
// Determine whether all of the elements match a truth test. Delegate to
// Javascript 1.6's every(), if it is present.
// JavaScript 1.6's every(), if it is present.
_.all = function(obj, iterator, context) {
iterator = iterator || function(v){ return v; };
if (obj.every) return obj.every(iterator, context);
var result = true;
_.each(obj, function(value, index) {
result = result && !!iterator.call(context, value, index);
if (!result) throw '__break__';
if (!(result = result && iterator ? iterator.call(context, value, index) : value)) throw '__break__';
});
return result;
};
// Determine if at least one element in the object matches a truth test. Use
// Javascript 1.6's some(), if it exists.
// JavaScript 1.6's some(), if it exists.
_.any = function(obj, iterator, context) {
iterator = iterator || function(v) { return v; };
if (obj.some) return obj.some(iterator, context);
var result = false;
_.each(obj, function(value, index) {
if (result = !!iterator.call(context, value, index)) throw '__break__';
if (result = iterator ? iterator.call(context, value, index) : value) throw '__break__';
});
return result;
};
@@ -127,8 +125,7 @@
if (_.isArray(obj)) return _.indexOf(obj, target) != -1;
var found = false;
_.each(obj, function(pair) {
if (pair.value === target) {
found = true;
if (found = pair.value === target) {
throw '__break__';
}
});
@@ -153,10 +150,10 @@
// Return the maximum item or (item-based computation).
_.max = function(obj, iterator, context) {
if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
var result;
var result = {computed : -Infinity};
_.each(obj, function(value, index) {
var computed = iterator ? iterator.call(context, value, index) : value;
if (result == null || computed >= result.computed) result = {value : value, computed : computed};
computed >= result.computed && (result = {value : value, computed : computed});
});
return result.value;
};
@@ -164,10 +161,10 @@
// Return the minimum element (or element-based computation).
_.min = function(obj, iterator, context) {
if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
var result;
var result = {computed : Infinity};
_.each(obj, function(value, index) {
var computed = iterator ? iterator.call(context, value, index) : value;
if (result == null || computed < result.computed) result = {value : value, computed : computed};
computed < result.computed && (result = {value : value, computed : computed});
});
return result.value;
};
@@ -276,15 +273,16 @@
// item in an array, or -1 if the item is not included in the array.
_.indexOf = function(array, item) {
if (array.indexOf) return array.indexOf(item);
for (i=0; i<array.length; i++) if (array[i] === item) return i;
for (i=0, ii=array.length; i<ii; i++) if (array[i] === item) return i;
return -1;
};
// Provide Javascript 1.6's lastIndexOf, delegating to the native function,
// Provide JavaScript 1.6's lastIndexOf, delegating to the native function,
// if possible.
_.lastIndexOf = function(array, item) {
if (array.lastIndexOf) return array.lastIndexOf(item);
for (i=array.length - 1; i>=0; i--) if (array[i] === item) return i;
var i = array.length;
while (i--) if (array[i] === item) return i;
return -1;
};
@@ -403,7 +401,7 @@
// Is a given value a Function?
_.isFunction = function(obj) {
return typeof obj == 'function';
return Object.prototype.toString.call(obj) == '[object Function]';
};
// Is a given variable undefined?
@@ -427,8 +425,8 @@
return prefix ? prefix + id : id;
};
// Javascript templating a-la ERB, pilfered from John Resig's
// "Secrets of the Javascript Ninja", page 83.
// JavaScript templating a-la ERB, pilfered from John Resig's
// "Secrets of the JavaScript Ninja", page 83.
_.template = function(str, data) {
var fn = new Function('obj',
'var p=[],print=function(){p.push.apply(p,arguments);};' +