(func, context, argCount)
| 713 | // of the passed-in callback, to be repeatedly applied in other Underscore |
| 714 | // functions. |
| 715 | function optimizeCb(func, context, argCount) { |
| 716 | if (context === void 0) return func; |
| 717 | switch (argCount == null ? 3 : argCount) { |
| 718 | case 1: return function(value) { |
| 719 | return func.call(context, value); |
| 720 | }; |
| 721 | // The 2-argument case is omitted because we’re not using it. |
| 722 | case 3: return function(value, index, collection) { |
| 723 | return func.call(context, value, index, collection); |
| 724 | }; |
| 725 | case 4: return function(accumulator, value, index, collection) { |
| 726 | return func.call(context, accumulator, value, index, collection); |
| 727 | }; |
| 728 | } |
| 729 | return function() { |
| 730 | return func.apply(context, arguments); |
| 731 | }; |
| 732 | } |
| 733 | |
| 734 | // An internal function to generate callbacks that can be applied to each |
| 735 | // element in a collection, returning the desired result — either `_.identity`, |
no outgoing calls
no test coverage detected