From 1e4283aad35e08f0a2cd3dba303100454d7f7c01 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 13 Oct 2012 15:12:21 -0700
Subject: [PATCH] Remove compiling from `_.functions`, `_.isEmpty`, `_.pairs`,
 `_.values`, `_.contains`,  `_.find`, `_.invoke`, `_.pluck`, `_.reduce`, and
 `_.where`.

Former-commit-id: 207f20330ede82cb58d4f008fe5164771e97a8b0
---
 build.js                 |  78 ++++++++-----
 build/pre-compile.js     |  32 +-----
 lodash.js                | 238 +++++++++++++++++++--------------------
 lodash.min.js            |  70 ++++++------
 lodash.underscore.min.js |  61 +++++-----
 5 files changed, 238 insertions(+), 241 deletions(-)

diff --git a/build.js b/build.js
index 78f6740a1..0d6cb0a92 100755
--- a/build.js
+++ b/build.js
@@ -70,8 +70,8 @@
     'clone': ['extend', 'forEach', 'forOwn', 'isArguments', 'isPlainObject'],
     'compact': [],
     'compose': [],
-    'contains': [],
-    'countBy': ['forEach', 'identity'],
+    'contains': ['some'],
+    'countBy': ['forEach'],
     'debounce': [],
     'defaults': ['isArguments'],
     'defer': [],
@@ -81,27 +81,27 @@
     'every': ['identity'],
     'extend': ['isArguments'],
     'filter': ['identity'],
-    'find': ['identity'],
+    'find': ['some'],
     'first': [],
     'flatten': ['isArray'],
     'forEach': ['identity'],
     'forIn': ['identity', 'isArguments'],
     'forOwn': ['identity', 'isArguments'],
-    'functions': ['isArguments', 'isFunction'],
-    'groupBy': ['forEach', 'identity'],
+    'functions': ['forIn', 'isFunction'],
+    'groupBy': ['forEach'],
     'has': [],
     'identity': [],
     'indexOf': ['sortedIndex'],
     'initial': [],
     'intersection': ['indexOf'],
     'invert': [],
-    'invoke': [],
+    'invoke': ['forEach'],
     'isArguments': [],
     'isArray': [],
     'isBoolean': [],
     'isDate': [],
     'isElement': [],
-    'isEmpty': ['isArguments', 'isFunction'],
+    'isEmpty': ['forOwn', 'isArguments', 'isFunction'],
     'isEqual': ['isArguments', 'isFunction'],
     'isFinite': [],
     'isFunction': [],
@@ -125,15 +125,15 @@
     'mixin': ['forEach', 'functions'],
     'noConflict': [],
     'object': [],
-    'omit': ['forIn', 'indexOf', 'isArguments'],
+    'omit': ['forIn', 'indexOf'],
     'once': [],
-    'pairs': [],
+    'pairs': ['forOwn'],
     'partial': ['isFunction'],
     'pick': ['forIn'],
-    'pluck': [],
+    'pluck': ['forEach'],
     'random': [],
     'range': [],
-    'reduce': ['identity'],
+    'reduce': ['forEach'],
     'reduceRight': ['forEach', 'keys'],
     'reject': ['identity'],
     'rest': [],
@@ -141,20 +141,20 @@
     'shuffle': ['forEach'],
     'size': ['keys'],
     'some': ['identity'],
-    'sortBy': ['forEach', 'identity'],
+    'sortBy': ['forEach'],
     'sortedIndex': ['identity'],
     'tap': ['mixin'],
     'template': ['escape'],
     'throttle': [],
     'times': [],
-    'toArray': ['isFunction', 'values'],
+    'toArray': ['values'],
     'unescape': [],
     'union': ['indexOf'],
     'uniq': ['identity', 'indexOf'],
     'uniqueId': [],
     'value': ['mixin'],
-    'values': ['isArguments'],
-    'where': ['forIn'],
+    'values': ['forOwn'],
+    'where': ['forEach', 'forIn'],
     'without': ['indexOf'],
     'wrap': [],
     'zip': ['max', 'pluck']
@@ -676,9 +676,9 @@
     return removeVar(source, 'isKeysFast')
       // remove optimized branch in `iteratorTemplate`
       .replace(/(?: *\/\/.*\n)* *'( *)<% *if *\(isKeysFast[\s\S]+?'\1<% *} *else *\{ *%>.+\n([\s\S]+?) *'\1<% *} *%>.+/, "'\\n' +\n$2")
-      // remove `isKeysFast` from `beforeLoop.object` of `mapIteratorOptions`
+      // remove `isKeysFast` from `beforeLoop.object` of `_.map`
       .replace(/=\s*'\s*\+\s*\(isKeysFast.+/, "= []'")
-      // remove `isKeysFast` from `inLoop.object` of `mapIteratorOptions`, `invoke`, `pairs`, `pluck`, and `sortBy`
+      // remove `isKeysFast` from `inLoop.object` of `_.map`
       .replace(/'\s*\+\s*\(isKeysFast[^)]+?\)\s*\+\s*'/g, '.push')
       // remove data object property assignment in `createIterator`
       .replace(/ *'isKeysFast':.+\n/, '');
@@ -948,6 +948,11 @@
     // flag used to specify replacing Lo-Dash's `_.clone` with Underscore's
     var useUnderscoreClone = isUnderscore;
 
+    // flags used to specify exposing Lo-Dash methods in an Underscore build
+    var exposeForIn = !isUnderscore,
+        exposeForOwn = !isUnderscore,
+        exposeIsPlainObject = !isUnderscore;
+
     /*------------------------------------------------------------------------*/
 
     // names of methods to include in the build
@@ -972,11 +977,13 @@
           (result = getDependencies(optionToMethodsArray(source, value)));
       });
 
-      // use Lo-Dash's clone if explicitly requested
-      if (result && result.indexOf('clone') > -1) {
-        useUnderscoreClone = false;
+      // include Lo-Dash's methods if explicitly requested
+      if (result) {
+        exposeForIn = result.indexOf('forIn') > -1;
+        exposeForOwn = result.indexOf('forOwn') > -1;
+        exposeIsPlainObject = result.indexOf('isPlainObject') > -1;
+        useUnderscoreClone = result.indexOf('clone') < 0;
       }
-
       // add method names required by Backbone and Underscore builds
       if (isBackbone && !result) {
         result = getDependencies(backboneDependencies);
@@ -1123,7 +1130,7 @@
         ].join('\n'));
 
         // replace `arrayLikeClasses` in `_.isEmpty`
-        source = source.replace(/'if *\(arrayLikeClasses[\s\S]+?' \|\|\\n/, "'if (isArray(value) || className == stringClass ||");
+        source = source.replace(/if *\(\(arrayLikeClasses.+?noArgsClass.+/, 'if (isArray(value) || className == stringClass ||');
 
         // replace `arrayLikeClasses` in `_.isEqual`
         source = source.replace(/(?: *\/\/.*\n)*( +)var isArr *= *arrayLikeClasses[^}]+}/, '$1var isArr = isArray(a);');
@@ -1248,11 +1255,22 @@
         });
 
         if (isUnderscore) {
-          // remove "compiled template cleanup" from `_.template`
-          source = source.replace(/(?:\s*\/\/.*)*\n *source *=.+?isEvaluating.+?reEmptyStringLeading[\s\S]+?\);/, '');
-          source = removeVar(source, 'reEmptyStringLeading');
-          source = removeVar(source, 'reEmptyStringMiddle');
-          source = removeVar(source, 'reEmptyStringTrailing');
+          // remove `_.forIn`, `_.forOwn`, and `_.isPlainObject` assignments
+          (function() {
+            var snippet = getMethodAssignments(source),
+                modified = snippet;
+
+            if (!exposeForIn) {
+              modified = modified.replace(/(?:\n *\/\/.*\s*)* *lodash\.forIn *= *.+\n/, '');
+            }
+            if (!exposeForOwn) {
+              modified = modified.replace(/(?:\n *\/\/.*\s*)* *lodash\.forOwn *= *.+\n/, '');
+            }
+            if (!exposeIsPlainObject) {
+              modified = modified.replace(/(?:\n *\/\/.*\s*)* *lodash\.isPlainObject *= *.+\n/, '');
+            }
+            source = source.replace(snippet, modified);
+          }());
 
           // replace `isArguments` and its fallback
           (function() {
@@ -1267,6 +1285,12 @@
                 .replace(/\bnoArgsClass\b/g, '!lodash.isArguments(arguments)');
             });
           }());
+
+          // remove "compiled template cleanup" from `_.template`
+          source = source.replace(/(?:\s*\/\/.*)*\n *source *=.+?isEvaluating.+?reEmptyStringLeading[\s\S]+?\);/, '');
+          source = removeVar(source, 'reEmptyStringLeading');
+          source = removeVar(source, 'reEmptyStringMiddle');
+          source = removeVar(source, 'reEmptyStringTrailing');
         }
         else {
           source = removeIsArgumentsFallback(source);
diff --git a/build/pre-compile.js b/build/pre-compile.js
index 3d2afa552..8fb409c9f 100644
--- a/build/pre-compile.js
+++ b/build/pre-compile.js
@@ -21,37 +21,20 @@
     'object',
     'ownIndex',
     'ownProps',
-    'prop',
     'propertyIsEnumerable',
-    'propIndex',
-    'props',
     'result',
     'skipProto',
-    'slice',
     'stringClass',
     'thisArg',
     'toString',
-    'undefined',
     'value',
 
     // lesser used variables
-    'args',
-    'arrayLikeClasses',
     'bind',
-    'className',
-    'forIn',
     'funcs',
     'isArguments',
-    'isFunc',
     'isFunction',
-    'methodName',
-    'objectClass',
-    'objectTypes',
-    'pass',
-    'properties',
-    'property',
-    'propsLength',
-    'target'
+    'objectTypes'
   ];
 
   /** Used to minify `compileIterator` option properties */
@@ -290,10 +273,10 @@
     // remove debug sourceURL use in `_.template`
     source = source.replace(/(?:\s*\/\/.*\n)* *var sourceURL[^;]+;|\+ *sourceURL/g, '');
 
-    // minify internal properties used by 'compareAscending', `_.merge`, and `_.sortBy`
+    // minify internal properties used by 'compareAscending' and `_.sortBy`
     (function() {
       var properties = ['criteria', 'index', 'value'],
-          snippets = source.match(/( +)function (?:compareAscending|merge|sortBy)\b[\s\S]+?\n\1}/g);
+          snippets = source.match(/( +)function (?:compareAscending|sortBy)\b[\s\S]+?\n\1}/g);
 
       if (!snippets) {
         return;
@@ -309,13 +292,8 @@
 
           modified = modified
             .replace(reBracketProp, "['" + minNames[index] + "']")
-            .replace(reDotProp, '.' + minNames[index])
-            .replace(rePropColon, "$1'" + minNames[index] + "':")
-
-          // correct `value.source` in regexp branch of `_.clone`
-          if (property == 'source') {
-            modified = modified.replace("value['" + minNames[index] + "']", "value['source']");
-          }
+            .replace(reDotProp, "['" + minNames[index] + "']")
+            .replace(rePropColon, "$1'" + minNames[index] + "':");
         });
 
         // replace with modified snippet
diff --git a/lodash.js b/lodash.js
index 0c598cd20..ada830bdc 100644
--- a/lodash.js
+++ b/lodash.js
@@ -425,8 +425,8 @@
   );
 
   /**
-   * Reusable iterator options shared by `every`, `filter`,
-   * `find`, `forEach`, `forIn`, `forOwn`, `map`, `reject`, and `some`.
+   * Reusable iterator options shared by `every`, `filter`, forEach`, `forIn`,
+   * `forOwn`, `map`, `reject`, and `some`.
    */
   var baseIteratorOptions = {
     'args': 'collection, callback, thisArg',
@@ -452,13 +452,13 @@
     'bottom': '  }\n}'
   };
 
-  /** Reusable iterator options for `filter`, `reject`, and `where` */
+  /** Reusable iterator options for `filter` and `reject` */
   var filterIteratorOptions = {
     'init': '[]',
     'inLoop': 'callback(value, index, collection) && result.push(value)'
   };
 
-  /** Reusable iterator options for `find`, `forEach`, `forIn`, and `forOwn` */
+  /** Reusable iterator options for `forEach`, `forIn`, and `forOwn` */
   var forEachIteratorOptions = {
     'top': 'callback = createCallback(callback, thisArg)'
   };
@@ -470,19 +470,6 @@
     }
   };
 
-  /** Reusable iterator options for `invoke`, `map`, and `pluck` */
-  var mapIteratorOptions = {
-    'init': 'collection || []',
-    'beforeLoop': {
-      'array':  'result = Array(length)',
-      'object': 'result = ' + (isKeysFast ? 'Array(length)' : '[]')
-    },
-    'inLoop': {
-      'array':  'result[index] = callback(value, index, collection)',
-      'object': 'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '(callback(value, index, collection))'
-    }
-  };
-
   /*--------------------------------------------------------------------------*/
 
   /**
@@ -701,16 +688,14 @@
     }
     // create the function factory
     var factory = Function(
-        'arrayLikeClasses, bind, createCallback, forIn, hasOwnProperty, isArguments, ' +
-        'isFunction, objectClass, objectTypes, nativeKeys, propertyIsEnumerable, ' +
-        'slice, stringClass, toString, undefined',
+        'bind, createCallback, forIn, hasOwnProperty, isArguments, isFunction, ' +
+        'objectTypes, nativeKeys, propertyIsEnumerable, stringClass, toString',
       'return function(' + args + ') {\n' + iteratorTemplate(data) + '\n}'
     );
     // return the compiled function
     return factory(
-      arrayLikeClasses, bind, createCallback, forIn, hasOwnProperty, isArguments,
-      isFunction, objectClass, objectTypes, nativeKeys, propertyIsEnumerable,
-      slice, stringClass, toString
+      bind, createCallback, forIn, hasOwnProperty, isArguments, isFunction,
+      objectTypes, nativeKeys, propertyIsEnumerable, stringClass, toString
     );
   }
 
@@ -1171,13 +1156,15 @@
    * _.functions(_);
    * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
    */
-  var functions = createIterator({
-    'useHas': false,
-    'args': 'object',
-    'init': '[]',
-    'inLoop': 'isFunction(value) && result.push(index)',
-    'bottom': 'result.sort()'
-  });
+  function functions(object) {
+    var result = [];
+    forIn(object, function(value, key) {
+      if (isFunction(value)) {
+        result.push(key);
+      }
+    });
+    return result.sort();
+  }
 
   /**
    * Checks if the specified object `property` exists and is a direct property,
@@ -1270,21 +1257,23 @@
    * _.isEmpty('');
    * // => true
    */
-  var isEmpty = createIterator({
-    'args': 'value',
-    'init': 'true',
-    'top':
-      'var className = toString.call(value),\n' +
-      '    length = value.length;\n' +
-      'if (arrayLikeClasses[className]' +
-      (noArgsClass ? ' || isArguments(value)' : '') + ' ||\n' +
-      '  (className == objectClass && length === +length &&\n' +
-      '  isFunction(value.splice))' +
-      ') return !length',
-    'inLoop': {
-      'object': 'return false'
+  function isEmpty(value) {
+    var result = true;
+    if (!value) {
+      return result;
     }
-  });
+    var className = toString.call(value),
+        length = value.length;
+
+    if ((arrayLikeClasses[className] || (noArgsClass && isArguments(value))) ||
+        (className == objectClass && length === +length && isFunction(value.splice))) {
+      return !length;
+    }
+    forOwn(value, function() {
+      return (result = false);
+    });
+    return result;
+  }
 
   /**
    * Performs a deep comparison between two values to determine if they are
@@ -1778,11 +1767,13 @@
    * _.pairs({ 'moe': 30, 'larry': 40, 'curly': 50 });
    * // => [['moe', 30], ['larry', 40], ['curly', 50]] (order is not guaranteed)
    */
-  var pairs = createIterator({
-    'args': 'object',
-    'init':'[]',
-    'inLoop': 'result'  + (isKeysFast ? '[ownIndex] = ' : '.push') + '([index, value])'
-  });
+  function pairs(object) {
+    var result = [];
+    forOwn(object, function(value, key) {
+      result.push([key, value]);
+    });
+    return result;
+  }
 
   /**
    * Creates a shallow clone of `object` composed of the specified properties.
@@ -1846,11 +1837,13 @@
    * _.values({ 'one': 1, 'two': 2, 'three': 3 });
    * // => [1, 2, 3]
    */
-  var values = createIterator({
-    'args': 'object',
-    'init': '[]',
-    'inLoop': 'result.push(value)'
-  });
+  function values(object) {
+    var result = [];
+    forOwn(object, function(value) {
+      result.push(value);
+    });
+    return result;
+  }
 
   /*--------------------------------------------------------------------------*/
 
@@ -1876,15 +1869,11 @@
    * _.contains('curly', 'ur');
    * // => true
    */
-  var contains = createIterator({
-    'args': 'collection, target',
-    'init': 'false',
-    'noCharByIndex': false,
-    'beforeLoop': {
-      'array': 'if (toString.call(collection) == stringClass) return collection.indexOf(target) > -1'
-    },
-    'inLoop': 'if (value === target) return true'
-  });
+  function contains(collection, target) {
+    return toString.call(collection) == stringClass
+      ? collection.indexOf(target) > -1
+      : some(collection, function(value) { return value === target; });
+  }
 
   /**
    * Creates an object composed of keys returned from running each element of
@@ -1983,10 +1972,14 @@
    * var even = _.find([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
    * // => 2
    */
-  var find = createIterator(baseIteratorOptions, forEachIteratorOptions, {
-    'init': 'undefined',
-    'inLoop': 'if (callback(value, index, collection)) return value'
-  });
+  function find(collection, callback, thisArg) {
+    var result;
+    callback = createCallback(callback, thisArg);
+    some(collection, function(value, index, collection) {
+      return callback(value, index, collection) && (result = value, true);
+    });
+    return result;
+  }
 
   /**
    * Iterates over a `collection`, executing the `callback` for each element in
@@ -2070,19 +2063,16 @@
    * _.invoke([123, 456], String.prototype.split, '');
    * // => [['1', '2', '3'], ['4', '5', '6']]
    */
-  var invoke = createIterator(mapIteratorOptions, {
-    'args': 'collection, methodName',
-    'top':
-      'var args = slice.call(arguments, 2),\n' +
-      '    isFunc = typeof methodName == \'function\'',
-    'inLoop': {
-      'array':
-        'result[index] = (isFunc ? methodName : value[methodName]).apply(value, args)',
-      'object':
-        'result' + (isKeysFast ? '[ownIndex] = ' : '.push') +
-        '((isFunc ? methodName : value[methodName]).apply(value, args))'
-    }
-  });
+  function invoke(collection, methodName) {
+    var args = slice.call(arguments, 2),
+        isFunc = typeof methodName == 'function',
+        result = [];
+
+    forEach(collection, function(value) {
+      result.push((isFunc ? methodName : value[methodName]).apply(value, args));
+    });
+    return result;
+  }
 
   /**
    * Creates an array of values by running each element in the `collection`
@@ -2105,7 +2095,17 @@
    * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
    * // => [3, 6, 9] (order is not guaranteed)
    */
-  var map = createIterator(baseIteratorOptions, mapIteratorOptions);
+  var map = createIterator(baseIteratorOptions, {
+    'init': 'collection || []',
+    'beforeLoop': {
+      'array':  'result = Array(length)',
+      'object': 'result = ' + (isKeysFast ? 'Array(length)' : '[]')
+    },
+    'inLoop': {
+      'array':  'result[index] = callback(value, index, collection)',
+      'object': 'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '(callback(value, index, collection))'
+    }
+  });
 
   /**
    * Retrieves the maximum value of an `array`. If `callback` is passed,
@@ -2220,13 +2220,13 @@
    * _.pluck(stooges, 'name');
    * // => ['moe', 'larry', 'curly']
    */
-  var pluck = createIterator(mapIteratorOptions, {
-    'args': 'collection, property',
-    'inLoop': {
-      'array':  'result[index] = value[property]',
-      'object': 'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '(value[property])'
-    }
-  });
+  function pluck(collection, property) {
+    var result = [];
+    forEach(collection, function(value) {
+      result.push(value[property]);
+    });
+    return result;
+  }
 
   /**
    * Boils down a `collection` to a single value. The initial state of the
@@ -2248,24 +2248,16 @@
    * var sum = _.reduce([1, 2, 3], function(memo, num) { return memo + num; });
    * // => 6
    */
-  var reduce = createIterator({
-    'args': 'collection, callback, accumulator, thisArg',
-    'init': 'accumulator',
-    'top':
-      'var noaccum = arguments.length < 3;\n' +
-      'callback = createCallback(callback, thisArg)',
-    'beforeLoop': {
-      'array': 'if (noaccum) result = iteratee[++index]'
-    },
-    'inLoop': {
-      'array':
-        'result = callback(result, value, index, collection)',
-      'object':
-        'result = noaccum\n' +
-        '  ? (noaccum = false, value)\n' +
-        '  : callback(result, value, index, collection)'
-    }
-  });
+  function reduce(collection, callback, accumulator, thisArg) {
+    var noaccum = arguments.length < 3;
+    callback = createCallback(callback, thisArg);
+    forEach(collection, function(value, index, collection) {
+      accumulator = noaccum
+        ? (noaccum = false, value)
+        : callback(accumulator, value, index, collection)
+    });
+    return accumulator;
+  }
 
   /**
    * The right-associative version of `_.reduce`.
@@ -2430,7 +2422,6 @@
   function sortBy(collection, callback, thisArg) {
     var result = [];
     callback = createCallback(callback, thisArg);
-
     forEach(collection, function(value, index, collection) {
       result.push({
         'criteria': callback(value, index, collection),
@@ -2494,19 +2485,26 @@
    * _.where(stooges, { 'age': 40 });
    * // => [{ 'name': 'moe', 'age': 40 }]
    */
-  var where = createIterator(filterIteratorOptions, {
-    'args': 'collection, properties',
-    'top':
-      'var props = [];\n' +
-      'forIn(properties, function(value, prop) { props.push(prop) });\n' +
-      'var propsLength = props.length',
-    'inLoop':
-      'for (var pass = true, propIndex = 0; propIndex < propsLength; propIndex++) {\n' +
-      '  var prop = props[propIndex];\n' +
-      '  if (!(pass = value[prop] === properties[prop])) break\n' +
-      '}\n' +
-      'pass && result.push(value)'
-  });
+  function where(collection, properties) {
+    var props = [];
+    forIn(properties, function(value, prop) { props.push(prop); });
+
+    var propsLength = props.length,
+        result = [];
+
+    forEach(collection, function(value) {
+      for (var pass = true, propIndex = 0; propIndex < propsLength; propIndex++) {
+        var prop = props[propIndex];
+        if (!(pass = value[prop] === properties[prop])) {
+          break;
+        }
+      }
+      if (pass) {
+        result.push(value);
+      }
+    });
+    return result;
+  }
 
   /*--------------------------------------------------------------------------*/
 
diff --git a/lodash.min.js b/lodash.min.js
index ad96091e8..0d502f550 100644
--- a/lodash.min.js
+++ b/lodash.min.js
@@ -2,38 +2,38 @@
  Lo-Dash 0.8.2 lodash.com/license
  Underscore.js 1.4.2 underscorejs.org/LICENSE
 */
-;(function(e,t){function s(e){if(e&&e.__wrapped__)return e;if(!(this instanceof s))return new s(e);this.__wrapped__=e}function o(e,t,n){t||(t=0);var r=e.length,i=r-t>=(n||H),s=i?{}:e;if(i)for(n=t-1;++n<r;){var o=e[n]+"";(Z.call(s,o)?s[o]:s[o]=[]).push(e[n])}return function(e){if(i){var n=e+"";return Z.call(s,n)&&-1<T(s[n],e)}return-1<T(s,e,t)}}function u(e,n){var r=e.b,i=n.b,e=e.a,n=n.a;if(e!==n){if(e>n||e===t)return 1;if(e<n||n===t)return-1}return r<i?-1:1}function a(e,t,n){function r(){var u=arguments
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