app/assets/javascripts/ultimate/underscore/underscore.js in ultimate-helpers-0.1.0.1 vs app/assets/javascripts/ultimate/underscore/underscore.js in ultimate-helpers-0.2.0
- old
+ new
@@ -1,15 +1,16 @@
-// Underscore.js 1.4.2
-// http://underscorejs.org
-// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
-// Underscore may be freely distributed under the MIT license.
+// Underscore.js 1.4.4
+// ===================
+// > http://underscorejs.org
+// > (c) 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
+// > Underscore may be freely distributed under the MIT license.
+
+// Baseline setup
+// --------------
(function() {
- // Baseline setup
- // --------------
-
// 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 = root._;
@@ -22,11 +23,10 @@
// Create quick reference variables for speed access to core prototypes.
var push = ArrayProto.push,
slice = ArrayProto.slice,
concat = ArrayProto.concat,
- unshift = ArrayProto.unshift,
toString = ObjProto.toString,
hasOwnProperty = ObjProto.hasOwnProperty;
// All **ECMAScript 5** native function implementations that we hope to use
// are declared here.
@@ -59,15 +59,15 @@
if (typeof module !== 'undefined' && module.exports) {
exports = module.exports = _;
}
exports._ = _;
} else {
- root['_'] = _;
+ root._ = _;
}
// Current version.
- _.VERSION = '1.4.2';
+ _.VERSION = '1.4.4';
// Collection Functions
// --------------------
// The cornerstone, an `each` implementation, aka `forEach`.
@@ -100,10 +100,12 @@
results[results.length] = iterator.call(context, value, index, list);
});
return results;
};
+ var reduceError = 'Reduce of empty array with no initial value';
+
// **Reduce** builds up a single result from a list of values, aka `inject`,
// or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
_.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
var initial = arguments.length > 2;
if (obj == null) obj = [];
@@ -117,22 +119,22 @@
initial = true;
} else {
memo = iterator.call(context, memo, value, index, list);
}
});
- if (!initial) throw new TypeError('Reduce of empty array with no initial value');
+ if (!initial) throw new TypeError(reduceError);
return memo;
};
// The right-associative version of reduce, also known as `foldr`.
// Delegates to **ECMAScript 5**'s native `reduceRight` if available.
_.reduceRight = _.foldr = function(obj, iterator, memo, context) {
var initial = arguments.length > 2;
if (obj == null) obj = [];
if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
if (context) iterator = _.bind(iterator, context);
- return arguments.length > 2 ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
+ return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
}
var length = obj.length;
if (length !== +length) {
var keys = _.keys(obj);
length = keys.length;
@@ -144,11 +146,11 @@
initial = true;
} else {
memo = iterator.call(context, memo, obj[index], index, list);
}
});
- if (!initial) throw new TypeError('Reduce of empty array with no initial value');
+ if (!initial) throw new TypeError(reduceError);
return memo;
};
// Return the first value which passes a truth test. Aliased as `detect`.
_.find = _.detect = function(obj, iterator, context) {
@@ -175,16 +177,13 @@
return results;
};
// Return all the elements for which a truth test fails.
_.reject = function(obj, iterator, context) {
- var results = [];
- if (obj == null) return results;
- each(obj, function(value, index, list) {
- if (!iterator.call(context, value, index, list)) results[results.length] = value;
- });
- return results;
+ return _.filter(obj, function(value, index, list) {
+ return !iterator.call(context, value, index, list);
+ }, context);
};
// Determine whether all of the elements match a truth test.
// Delegates to **ECMAScript 5**'s native `every` if available.
// Aliased as `all`.
@@ -214,53 +213,58 @@
};
// Determine if the array or object contains a given value (using `===`).
// Aliased as `include`.
_.contains = _.include = function(obj, target) {
- var found = false;
- if (obj == null) return found;
+ if (obj == null) return false;
if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
- found = any(obj, function(value) {
+ return any(obj, function(value) {
return value === target;
});
- return found;
};
// Invoke a method (with arguments) on every item in a collection.
_.invoke = function(obj, method) {
var args = slice.call(arguments, 2);
+ var isFunc = _.isFunction(method);
return _.map(obj, function(value) {
- return (_.isFunction(method) ? method : value[method]).apply(value, args);
+ return (isFunc ? method : value[method]).apply(value, args);
});
};
// Convenience version of a common use case of `map`: fetching a property.
_.pluck = function(obj, key) {
return _.map(obj, function(value){ return value[key]; });
};
// Convenience version of a common use case of `filter`: selecting only objects
- // with specific `key:value` pairs.
- _.where = function(obj, attrs) {
- if (_.isEmpty(attrs)) return [];
- return _.filter(obj, function(value) {
+ // containing specific `key:value` pairs.
+ _.where = function(obj, attrs, first) {
+ if (_.isEmpty(attrs)) return first ? null : [];
+ return _[first ? 'find' : 'filter'](obj, function(value) {
for (var key in attrs) {
if (attrs[key] !== value[key]) return false;
}
return true;
});
};
+ // Convenience version of a common use case of `find`: getting the first object
+ // containing specific `key:value` pairs.
+ _.findWhere = function(obj, attrs) {
+ return _.where(obj, attrs, true);
+ };
+
// Return the maximum element or (element-based computation).
// Can't optimize arrays of integers longer than 65,535 elements.
// See: https://bugs.webkit.org/show_bug.cgi?id=80797
_.max = function(obj, iterator, context) {
if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
return Math.max.apply(Math, obj);
}
if (!iterator && _.isEmpty(obj)) return -Infinity;
- var result = {computed : -Infinity};
+ var result = {computed : -Infinity, value: -Infinity};
each(obj, function(value, index, list) {
var computed = iterator ? iterator.call(context, value, index, list) : value;
computed >= result.computed && (result = {value : value, computed : computed});
});
return result.value;
@@ -270,11 +274,11 @@
_.min = function(obj, iterator, context) {
if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
return Math.min.apply(Math, obj);
}
if (!iterator && _.isEmpty(obj)) return Infinity;
- var result = {computed : Infinity};
+ var result = {computed : Infinity, value: Infinity};
each(obj, function(value, index, list) {
var computed = iterator ? iterator.call(context, value, index, list) : value;
computed < result.computed && (result = {value : value, computed : computed});
});
return result.value;
@@ -319,11 +323,11 @@
};
// An internal function used for aggregate "group by" operations.
var group = function(obj, value, context, behavior) {
var result = {};
- var iterator = lookupIterator(value);
+ var iterator = lookupIterator(value || _.identity);
each(obj, function(value, index) {
var key = iterator.call(context, value, index, obj);
behavior(result, key, value);
});
return result;
@@ -339,11 +343,11 @@
// Counts instances of an object that group by a certain criterion. Pass
// either a string attribute to count by, or a function that returns the
// criterion.
_.countBy = function(obj, value, context) {
- return group(obj, value, context, function(result, key, value) {
+ return group(obj, value, context, function(result, key) {
if (!_.has(result, key)) result[key] = 0;
result[key]++;
});
};
@@ -361,11 +365,12 @@
};
// Safely convert anything iterable into a real, live array.
_.toArray = function(obj) {
if (!obj) return [];
- if (obj.length === +obj.length) return slice.call(obj);
+ if (_.isArray(obj)) return slice.call(obj);
+ if (obj.length === +obj.length) return _.map(obj, _.identity);
return _.values(obj);
};
// Return the number of elements in an object.
_.size = function(obj) {
@@ -411,11 +416,11 @@
return slice.call(array, (n == null) || guard ? 1 : n);
};
// Trim out all falsy values from an array.
_.compact = function(array) {
- return _.filter(array, function(value){ return !!value; });
+ return _.filter(array, _.identity);
};
// Internal implementation of a recursive `flatten` function.
var flatten = function(input, shallow, output) {
each(input, function(value) {
@@ -440,10 +445,15 @@
// Produce a duplicate-free version of the array. If the array has already
// been sorted, you have the option of using a faster algorithm.
// Aliased as `unique`.
_.uniq = _.unique = function(array, isSorted, iterator, context) {
+ if (_.isFunction(isSorted)) {
+ context = iterator;
+ iterator = isSorted;
+ isSorted = false;
+ }
var initial = iterator ? _.map(array, iterator, context) : array;
var results = [];
var seen = [];
each(initial, function(value, index) {
if (isSorted ? (!index || seen[seen.length - 1] !== value) : !_.contains(seen, value)) {
@@ -563,37 +573,35 @@
};
// Function (ahem) Functions
// ------------------
- // Reusable constructor function for prototype setting.
- var ctor = function(){};
-
// Create a function bound to a given object (assigning `this`, and arguments,
- // optionally). Binding with arguments is also known as `curry`.
- // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
- // We check for `func.bind` first, to fail fast when `func` is undefined.
- _.bind = function bind(func, context) {
- var bound, args;
+ // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
+ // available.
+ _.bind = function(func, context) {
if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
- if (!_.isFunction(func)) throw new TypeError;
- args = slice.call(arguments, 2);
- return bound = function() {
- if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
- ctor.prototype = func.prototype;
- var self = new ctor;
- var result = func.apply(self, args.concat(slice.call(arguments)));
- if (Object(result) === result) return result;
- return self;
+ var args = slice.call(arguments, 2);
+ return function() {
+ return func.apply(context, args.concat(slice.call(arguments)));
};
};
+ // Partially apply a function by creating a version that has had some of its
+ // arguments pre-filled, without changing its dynamic `this` context.
+ _.partial = function(func) {
+ var args = slice.call(arguments, 1);
+ return function() {
+ return func.apply(this, args.concat(slice.call(arguments)));
+ };
+ };
+
// Bind all of an object's methods to that object. Useful for ensuring that
// all callbacks defined on an object belong to it.
_.bindAll = function(obj) {
var funcs = slice.call(arguments, 1);
- if (funcs.length == 0) funcs = _.functions(obj);
+ if (funcs.length === 0) funcs = _.functions(obj);
each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
return obj;
};
// Memoize an expensive function by storing its results.
@@ -620,29 +628,30 @@
};
// Returns a function, that, when invoked, will only be triggered at most once
// during a given window of time.
_.throttle = function(func, wait) {
- var context, args, timeout, throttling, more, result;
- var whenDone = _.debounce(function(){ more = throttling = false; }, wait);
+ var context, args, timeout, result;
+ var previous = 0;
+ var later = function() {
+ previous = new Date;
+ timeout = null;
+ result = func.apply(context, args);
+ };
return function() {
- context = this; args = arguments;
- var later = function() {
+ var now = new Date;
+ var remaining = wait - (now - previous);
+ context = this;
+ args = arguments;
+ if (remaining <= 0) {
+ clearTimeout(timeout);
timeout = null;
- if (more) {
- result = func.apply(context, args);
- }
- whenDone();
- };
- if (!timeout) timeout = setTimeout(later, wait);
- if (throttling) {
- more = true;
- } else {
- throttling = true;
+ previous = now;
result = func.apply(context, args);
+ } else if (!timeout) {
+ timeout = setTimeout(later, remaining);
}
- whenDone();
return result;
};
};
// Returns a function, that, as long as it continues to be invoked, will not
@@ -756,12 +765,14 @@
};
// Extend a given object with all the properties in passed-in object(s).
_.extend = function(obj) {
each(slice.call(arguments, 1), function(source) {
- for (var prop in source) {
- obj[prop] = source[prop];
+ if (source) {
+ for (var prop in source) {
+ obj[prop] = source[prop];
+ }
}
});
return obj;
};
@@ -786,12 +797,14 @@
};
// Fill in a given object with default properties.
_.defaults = function(obj) {
each(slice.call(arguments, 1), function(source) {
- for (var prop in source) {
- if (obj[prop] == null) obj[prop] = source[prop];
+ if (source) {
+ for (var prop in source) {
+ if (obj[prop] == null) obj[prop] = source[prop];
+ }
}
});
return obj;
};
@@ -952,11 +965,11 @@
};
}
// Is a given object a finite number?
_.isFinite = function(obj) {
- return _.isNumber(obj) && isFinite(obj);
+ return isFinite(obj) && !isNaN(parseFloat(obj));
};
// Is the given value `NaN`? (NaN is the only number which does not equal itself).
_.isNaN = function(obj) {
return _.isNumber(obj) && obj != +obj;
@@ -998,20 +1011,22 @@
return value;
};
// Run a function **n** times.
_.times = function(n, iterator, context) {
- for (var i = 0; i < n; i++) iterator.call(context, i);
+ var accum = Array(n);
+ for (var i = 0; i < n; i++) accum[i] = iterator.call(context, i);
+ return accum;
};
// Return a random integer between min and max (inclusive).
_.random = function(min, max) {
if (max == null) {
max = min;
min = 0;
}
- return min + (0 | Math.random() * (max - min + 1));
+ return min + Math.floor(Math.random() * (max - min + 1));
};
// List of HTML entities for escaping.
var entityMap = {
escape: {
@@ -1063,11 +1078,11 @@
// Generate a unique integer id (unique within the entire client session).
// Useful for temporary DOM ids.
var idCounter = 0;
_.uniqueId = function(prefix) {
- var id = idCounter++;
+ var id = ++idCounter + '';
return prefix ? prefix + id : id;
};
// By default, Underscore uses ERB-style template delimiters, change the
// following template settings to use alternative delimiters.
@@ -1098,10 +1113,11 @@
// JavaScript micro-templating, similar to John Resig's implementation.
// Underscore templating handles arbitrary delimiters, preserves whitespace,
// and correctly escapes quotes within interpolated code.
_.template = function(text, data, settings) {
+ var render;
settings = _.defaults({}, settings, _.templateSettings);
// Combine delimiters into one regular expression via alternation.
var matcher = new RegExp([
(settings.escape || noMatch).source,
@@ -1113,15 +1129,22 @@
var index = 0;
var source = "__p+='";
text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
source += text.slice(index, offset)
.replace(escaper, function(match) { return '\\' + escapes[match]; });
- source +=
- escape ? "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'" :
- interpolate ? "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'" :
- evaluate ? "';\n" + evaluate + "\n__p+='" : '';
+
+ if (escape) {
+ source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
+ }
+ if (interpolate) {
+ source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
+ }
+ if (evaluate) {
+ source += "';\n" + evaluate + "\n__p+='";
+ }
index = offset + match.length;
+ return match;
});
source += "';\n";
// If a variable is not specified, place data values in local scope.
if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';
@@ -1129,10 +1152,10 @@
source = "var __t,__p='',__j=Array.prototype.join," +
"print=function(){__p+=__j.call(arguments,'');};\n" +
source + "return __p;\n";
try {
- var render = new Function(settings.variable || 'obj', '_', source);
+ render = new Function(settings.variable || 'obj', '_', source);
} catch (e) {
e.source = source;
throw e;
}