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version 0.3.2, with 'identity', and Rhino support

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This commit is contained in:
Jeremy Ashkenas
2009-10-29 14:45:56 -04:00
parent 4d09a85bae
commit d2d1285e26
3 changed files with 43 additions and 20 deletions
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32
underscore.js
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@@ -10,23 +10,20 @@
/*------------------------- Baseline setup ---------------------------------*/
// Are we running in CommonJS or in the browser?
var commonJS = (typeof window === 'undefined' && typeof exports !== 'undefined');
// Establish the root object, "window" in the browser, or "global" on the server.
var root = this;
// Save the previous value of the "_" variable.
var previousUnderscore = commonJS ? null : window._;
// Keep the identity function around for default iterators.
var identity = function(value) { return value; };
var previousUnderscore = root._;
// Create a safe reference to the Underscore object for the functions below.
var _ = {};
var _ = root._ = {};
// Export the Underscore object for CommonJS, assign it globally otherwise.
commonJS ? _ = exports : window._ = _;
// Export the Underscore object for CommonJS.
if (typeof exports !== 'undefined') _ = exports;
// Current version.
_.VERSION = '0.3.1';
_.VERSION = '0.3.2';
/*------------------------ Collection Functions: ---------------------------*/
@@ -107,7 +104,7 @@
// Determine whether all of the elements match a truth test. Delegate to
// JavaScript 1.6's every(), if it is present.
_.all = function(obj, iterator, context) {
iterator = iterator || identity;
iterator = iterator || _.identity;
if (obj.every) return obj.every(iterator, context);
var result = true;
_.each(obj, function(value, index, list) {
@@ -119,7 +116,7 @@
// Determine if at least one element in the object matches a truth test. Use
// JavaScript 1.6's some(), if it exists.
_.any = function(obj, iterator, context) {
iterator = iterator || identity;
iterator = iterator || _.identity;
if (obj.some) return obj.some(iterator, context);
var result = false;
_.each(obj, function(value, index, list) {
@@ -192,7 +189,7 @@
// Use a comparator function to figure out at what index an object should
// be inserted so as to maintain order. Uses binary search.
_.sortedIndex = function(array, obj, iterator) {
iterator = iterator || identity;
iterator = iterator || _.identity;
var low = 0, high = array.length;
while (low < high) {
var mid = (low + high) >> 1;
@@ -360,7 +357,7 @@
// Retrieve the values of an object's properties.
_.values = function(obj) {
return _.map(obj, identity);
return _.map(obj, _.identity);
};
// Extend a given object with all of the properties in a source object.
@@ -421,10 +418,15 @@
// Run Underscore.js in noConflict mode, returning the '_' variable to its
// previous owner. Returns a reference to the Underscore object.
_.noConflict = function() {
if (!commonJS) window._ = previousUnderscore;
root._ = previousUnderscore;
return this;
};
// Keep the identity function around for default iterators.
_.identity = function(value) {
return value;
};
// Generate a unique integer id (unique within the entire client session).
// Useful for temporary DOM ids.
_.uniqueId = function(prefix) {