Sync with Underscore.

Former-commit-id: 2e3aacd53fef6d22d830dbc2d6c220808aea8739

build.js

@@ -31,7 +31,6 @@
     'head': 'first',
     'include': 'contains',
     'inject': 'reduce',
-    'intersect': 'intersection',
     'methods': 'functions',
     'select': 'filter',
     'tail': 'rest',
@@ -48,7 +47,6 @@
     'first': ['head', 'take'],
     'forEach': ['each'],
     'functions': ['methods'],
-    'intersection': ['intersect'],
     'map': ['collect'],
     'reduce': ['foldl', 'inject'],
     'reduceRight': ['foldr'],

build/pre-compile.js

@@ -110,7 +110,6 @@
     'initial',
     'inject',
     'interpolate',
-    'intersect',
     'intersection',
     'invoke',
     'isArguments',

lodash.js

@@ -1154,7 +1154,6 @@
    *
    * @static
    * @memberOf _
-   * @alias intersect
    * @category Arrays
    * @param {Array} [array1, array2, ...] Arrays to process.
    * @returns {Array} Returns a new array of unique values, in order, that are
@@ -1555,9 +1554,6 @@
         result = [],
         seen = [];
 
-    if (length < 3) {
-      isSorted = true;
-    }
     while (++index < length) {
       computed = callback ? callback(array[index]) : array[index];
       if (isSorted
@@ -1719,6 +1715,7 @@
 
     function bound() {
       var args = arguments,
+          isInstance = this instanceof bound,
           thisBinding = thisArg;
 
       if (!isFunc) {
@@ -1731,8 +1728,6 @@
         }
         args = partialArgs;
       }
-
-      var isInstance = this instanceof bound;
       if (isInstance) {
         // get `func` instance if `bound` is invoked in a `new` expression
         noop.prototype = func.prototype;
@@ -3223,7 +3218,6 @@
   lodash.head = first;
   lodash.include = contains;
   lodash.inject = reduce;
-  lodash.intersect = intersection;
   lodash.methods = functions;
   lodash.select = filter;
   lodash.tail = rest;