underscore - npm Package Compare versions

Comparing version 1.5.2 to 1.6.0

package.json

@@ -9,8 +9,12 @@ {
   "main"          : "underscore.js",
-  "version"       : "1.5.2",
+  "version"       : "1.6.0",
   "devDependencies": {
-    "phantomjs": "1.9.0-1"
+    "docco": "0.6.x",
+    "phantomjs": "1.9.0-1",
+    "uglify-js": "2.4.x"
   },
   "scripts": {
-    "test": "phantomjs test/vendor/runner.js test/index.html?noglobals=true"
+    "test": "phantomjs test/vendor/runner.js test/index.html?noglobals=true",
+    "build": "uglifyjs underscore.js -c \"evaluate=false\" --comments \"/    .*/\" -m --source-map underscore-min.map -o underscore-min.js",
+    "doc": "docco underscore.js"
   },
@@ -17,0 +21,0 @@ "licenses": [

underscore-min.js

@@ -1,6 +0,6 @@
-//     Underscore.js 1.5.2
+//     Underscore.js 1.6.0
 //     http://underscorejs.org
-//     (c) 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+//     (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 //     Underscore may be freely distributed under the MIT license.
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 //# sourceMappingURL=underscore-min.map

underscore.js

@@ -1,4 +0,4 @@
-//     Underscore.js 1.5.2
+//     Underscore.js 1.6.0
 //     http://underscorejs.org
-//     (c) 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+//     (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 //     Underscore may be freely distributed under the MIT license.
@@ -68,3 +68,3 @@
   // Current version.
-  _.VERSION = '1.5.2';
+  _.VERSION = '1.6.0';
 
@@ -78,3 +78,3 @@ // Collection Functions
   var each = _.each = _.forEach = function(obj, iterator, context) {
-    if (obj == null) return;
+    if (obj == null) return obj;
     if (nativeForEach && obj.forEach === nativeForEach) {
@@ -92,2 +92,3 @@ obj.forEach(iterator, context);
     }
+    return obj;
   };
@@ -158,6 +159,6 @@
   // Return the first value which passes a truth test. Aliased as `detect`.
-  _.find = _.detect = function(obj, iterator, context) {
+  _.find = _.detect = function(obj, predicate, context) {
     var result;
     any(obj, function(value, index, list) {
-      if (iterator.call(context, value, index, list)) {
+      if (predicate.call(context, value, index, list)) {
         result = value;
@@ -173,8 +174,8 @@ return true;
   // Aliased as `select`.
-  _.filter = _.select = function(obj, iterator, context) {
+  _.filter = _.select = function(obj, predicate, context) {
     var results = [];
     if (obj == null) return results;
-    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
+    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(predicate, context);
     each(obj, function(value, index, list) {
-      if (iterator.call(context, value, index, list)) results.push(value);
+      if (predicate.call(context, value, index, list)) results.push(value);
     });
@@ -185,5 +186,5 @@ return results;
   // Return all the elements for which a truth test fails.
-  _.reject = function(obj, iterator, context) {
+  _.reject = function(obj, predicate, context) {
     return _.filter(obj, function(value, index, list) {
-      return !iterator.call(context, value, index, list);
+      return !predicate.call(context, value, index, list);
     }, context);
@@ -195,9 +196,9 @@ };
   // Aliased as `all`.
-  _.every = _.all = function(obj, iterator, context) {
-    iterator || (iterator = _.identity);
+  _.every = _.all = function(obj, predicate, context) {
+    predicate || (predicate = _.identity);
     var result = true;
     if (obj == null) return result;
-    if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
+    if (nativeEvery && obj.every === nativeEvery) return obj.every(predicate, context);
     each(obj, function(value, index, list) {
-      if (!(result = result && iterator.call(context, value, index, list))) return breaker;
+      if (!(result = result && predicate.call(context, value, index, list))) return breaker;
     });
@@ -210,9 +211,9 @@ return !!result;
   // Aliased as `any`.
-  var any = _.some = _.any = function(obj, iterator, context) {
-    iterator || (iterator = _.identity);
+  var any = _.some = _.any = function(obj, predicate, context) {
+    predicate || (predicate = _.identity);
     var result = false;
     if (obj == null) return result;
-    if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
+    if (nativeSome && obj.some === nativeSome) return obj.some(predicate, context);
     each(obj, function(value, index, list) {
-      if (result || (result = iterator.call(context, value, index, list))) return breaker;
+      if (result || (result = predicate.call(context, value, index, list))) return breaker;
     });
@@ -243,3 +244,3 @@ return !!result;
   _.pluck = function(obj, key) {
-    return _.map(obj, function(value){ return value[key]; });
+    return _.map(obj, _.property(key));
   };
@@ -249,10 +250,4 @@
   // containing specific `key:value` pairs.
-  _.where = function(obj, attrs, first) {
-    if (_.isEmpty(attrs)) return first ? void 0 : [];
-    return _[first ? 'find' : 'filter'](obj, function(value) {
-      for (var key in attrs) {
-        if (attrs[key] !== value[key]) return false;
-      }
-      return true;
-    });
+  _.where = function(obj, attrs) {
+    return _.filter(obj, _.matches(attrs));
   };
@@ -263,3 +258,3 @@
   _.findWhere = function(obj, attrs) {
-    return _.where(obj, attrs, true);
+    return _.find(obj, _.matches(attrs));
   };
@@ -274,9 +269,11 @@
     }
-    if (!iterator && _.isEmpty(obj)) return -Infinity;
-    var result = {computed : -Infinity, value: -Infinity};
+    var result = -Infinity, lastComputed = -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});
+      if (computed > lastComputed) {
+        result = value;
+        lastComputed = computed;
+      }
     });
-    return result.value;
+    return result;
   };
@@ -289,12 +286,14 @@
     }
-    if (!iterator && _.isEmpty(obj)) return Infinity;
-    var result = {computed : Infinity, value: Infinity};
+    var result = Infinity, lastComputed = 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});
+      if (computed < lastComputed) {
+        result = value;
+        lastComputed = computed;
+      }
     });
-    return result.value;
+    return result;
   };
 
-  // Shuffle an array, using the modern version of the 
+  // Shuffle an array, using the modern version of the
   // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
@@ -313,7 +312,8 @@ _.shuffle = function(obj) {
 
-  // Sample **n** random values from an array.
-  // If **n** is not specified, returns a single random element from the array.
+  // Sample **n** random values from a collection.
+  // If **n** is not specified, returns a single random element.
   // The internal `guard` argument allows it to work with `map`.
   _.sample = function(obj, n, guard) {
-    if (arguments.length < 2 || guard) {
+    if (n == null || guard) {
+      if (obj.length !== +obj.length) obj = _.values(obj);
       return obj[_.random(obj.length - 1)];
@@ -326,8 +326,10 @@ }
   var lookupIterator = function(value) {
-    return _.isFunction(value) ? value : function(obj){ return obj[value]; };
+    if (value == null) return _.identity;
+    if (_.isFunction(value)) return value;
+    return _.property(value);
   };
 
   // Sort the object's values by a criterion produced by an iterator.
-  _.sortBy = function(obj, value, context) {
-    var iterator = lookupIterator(value);
+  _.sortBy = function(obj, iterator, context) {
+    iterator = lookupIterator(iterator);
     return _.pluck(_.map(obj, function(value, index, list) {
@@ -352,5 +354,5 @@ return {
   var group = function(behavior) {
-    return function(obj, value, context) {
+    return function(obj, iterator, context) {
       var result = {};
-      var iterator = value == null ? _.identity : lookupIterator(value);
+      iterator = lookupIterator(iterator);
       each(obj, function(value, index) {
@@ -367,3 +369,3 @@ var key = iterator.call(context, value, index, obj);
   _.groupBy = group(function(result, key, value) {
-    (_.has(result, key) ? result[key] : (result[key] = [])).push(value);
+    _.has(result, key) ? result[key].push(value) : result[key] = [value];
   });
@@ -387,3 +389,3 @@
   _.sortedIndex = function(array, obj, iterator, context) {
-    iterator = iterator == null ? _.identity : lookupIterator(iterator);
+    iterator = lookupIterator(iterator);
     var value = iterator.call(context, obj);
@@ -420,3 +422,5 @@ var low = 0, high = array.length;
     if (array == null) return void 0;
-    return (n == null) || guard ? array[0] : slice.call(array, 0, n);
+    if ((n == null) || guard) return array[0];
+    if (n < 0) return [];
+    return slice.call(array, 0, n);
   };
@@ -436,7 +440,4 @@
     if (array == null) return void 0;
-    if ((n == null) || guard) {
-      return array[array.length - 1];
-    } else {
-      return slice.call(array, Math.max(array.length - n, 0));
-    }
+    if ((n == null) || guard) return array[array.length - 1];
+    return slice.call(array, Math.max(array.length - n, 0));
   };
@@ -482,2 +483,12 @@
 
+  // Split an array into two arrays: one whose elements all satisfy the given
+  // predicate, and one whose elements all do not satisfy the predicate.
+  _.partition = function(array, predicate) {
+    var pass = [], fail = [];
+    each(array, function(elem) {
+      (predicate(elem) ? pass : fail).push(elem);
+    });
+    return [pass, fail];
+  };
+
   // Produce a duplicate-free version of the array. If the array has already
@@ -516,3 +527,3 @@ // been sorted, you have the option of using a faster algorithm.
       return _.every(rest, function(other) {
-        return _.indexOf(other, item) >= 0;
+        return _.contains(other, item);
       });
@@ -532,3 +543,3 @@ });
   _.zip = function() {
-    var length = _.max(_.pluck(arguments, "length").concat(0));
+    var length = _.max(_.pluck(arguments, 'length').concat(0));
     var results = new Array(length);
@@ -639,15 +650,23 @@ for (var i = 0; i < length; i++) {
   // Partially apply a function by creating a version that has had some of its
-  // arguments pre-filled, without changing its dynamic `this` context.
+  // arguments pre-filled, without changing its dynamic `this` context. _ acts
+  // as a placeholder, allowing any combination of arguments to be pre-filled.
   _.partial = function(func) {
-    var args = slice.call(arguments, 1);
+    var boundArgs = slice.call(arguments, 1);
     return function() {
-      return func.apply(this, args.concat(slice.call(arguments)));
+      var position = 0;
+      var args = boundArgs.slice();
+      for (var i = 0, length = args.length; i < length; i++) {
+        if (args[i] === _) args[i] = arguments[position++];
+      }
+      while (position < arguments.length) args.push(arguments[position++]);
+      return func.apply(this, args);
     };
   };
 
-  // Bind all of an object's methods to that object. Useful for ensuring that
-  // all callbacks defined on an object belong to it.
+  // Bind a number of an object's methods to that object. Remaining arguments
+  // are the method names to be bound. 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) throw new Error("bindAll must be passed function names");
+    if (funcs.length === 0) throw new Error('bindAll must be passed function names');
     each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
@@ -691,8 +710,9 @@ return obj;
     var later = function() {
-      previous = options.leading === false ? 0 : new Date;
+      previous = options.leading === false ? 0 : _.now();
       timeout = null;
       result = func.apply(context, args);
+      context = args = null;
     };
     return function() {
-      var now = new Date;
+      var now = _.now();
       if (!previous && options.leading === false) previous = now;
@@ -707,2 +727,3 @@ var remaining = wait - (now - previous);
         result = func.apply(context, args);
+        context = args = null;
       } else if (!timeout && options.trailing !== false) {
@@ -721,15 +742,20 @@ timeout = setTimeout(later, remaining);
     var timeout, args, context, timestamp, result;
+
+    var later = function() {
+      var last = _.now() - timestamp;
+      if (last < wait) {
+        timeout = setTimeout(later, wait - last);
+      } else {
+        timeout = null;
+        if (!immediate) {
+          result = func.apply(context, args);
+          context = args = null;
+        }
+      }
+    };
+
     return function() {
       context = this;
       args = arguments;
-      timestamp = new Date();
-      var later = function() {
-        var last = (new Date()) - timestamp;
-        if (last < wait) {
-          timeout = setTimeout(later, wait - last);
-        } else {
-          timeout = null;
-          if (!immediate) result = func.apply(context, args);
-        }
-      };
+      timestamp = _.now();
       var callNow = immediate && !timeout;
@@ -739,3 +765,7 @@ if (!timeout) {
       }
-      if (callNow) result = func.apply(context, args);
+      if (callNow) {
+        result = func.apply(context, args);
+        context = args = null;
+      }
+
       return result;
@@ -762,7 +792,3 @@ };
   _.wrap = function(func, wrapper) {
-    return function() {
-      var args = [func];
-      push.apply(args, arguments);
-      return wrapper.apply(this, args);
-    };
+    return _.partial(wrapper, func);
   };
@@ -797,4 +823,5 @@
   // Delegates to **ECMAScript 5**'s native `Object.keys`
-  _.keys = nativeKeys || function(obj) {
-    if (obj !== Object(obj)) throw new TypeError('Invalid object');
+  _.keys = function(obj) {
+    if (!_.isObject(obj)) return [];
+    if (nativeKeys) return nativeKeys(obj);
     var keys = [];
@@ -954,3 +981,4 @@ for (var key in obj) if (_.has(obj, key)) keys.push(key);
     if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) &&
-                             _.isFunction(bCtor) && (bCtor instanceof bCtor))) {
+                             _.isFunction(bCtor) && (bCtor instanceof bCtor))
+                        && ('constructor' in a && 'constructor' in b)) {
       return false;
@@ -1095,2 +1123,26 @@ }
 
+  _.constant = function(value) {
+    return function () {
+      return value;
+    };
+  };
+
+  _.property = function(key) {
+    return function(obj) {
+      return obj[key];
+    };
+  };
+
+  // Returns a predicate for checking whether an object has a given set of `key:value` pairs.
+  _.matches = function(attrs) {
+    return function(obj) {
+      if (obj === attrs) return true; //avoid comparing an object to itself.
+      for (var key in attrs) {
+        if (attrs[key] !== obj[key])
+          return false;
+      }
+      return true;
+    }
+  };
+
   // Run a function **n** times.
@@ -1112,2 +1164,5 @@ _.times = function(n, iterator, context) {
 
+  // A (possibly faster) way to get the current timestamp as an integer.
+  _.now = Date.now || function() { return new Date().getTime(); };
+
   // List of HTML entities for escaping.
@@ -1309,2 +1364,14 @@ var entityMap = {
 
+  // AMD registration happens at the end for compatibility with AMD loaders
+  // that may not enforce next-turn semantics on modules. Even though general
+  // practice for AMD registration is to be anonymous, underscore registers
+  // as a named module because, like jQuery, it is a base library that is
+  // popular enough to be bundled in a third party lib, but not be part of
+  // an AMD load request. Those cases could generate an error when an
+  // anonymous define() is called outside of a loader request.
+  if (typeof define === 'function' && define.amd) {
+    define('underscore', [], function() {
+      return _;
+    });
+  }
 }).call(this);

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Total package byte prevSize

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increased by4.04%

Lines of code

1257

increased by5.1%

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Dev dependency count

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increased by200%

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