| // 0 -> Array#forEach |
| // 1 -> Array#map |
| // 2 -> Array#filter |
| // 3 -> Array#some |
| // 4 -> Array#every |
| // 5 -> Array#find |
| // 6 -> Array#findIndex |
| var ctx = require('./_ctx') |
| , IObject = require('./_iobject') |
| , toObject = require('./_to-object') |
| , toLength = require('./_to-length') |
| , asc = require('./_array-species-create'); |
| module.exports = function(TYPE, $create){ |
| var IS_MAP = TYPE == 1 |
| , IS_FILTER = TYPE == 2 |
| , IS_SOME = TYPE == 3 |
| , IS_EVERY = TYPE == 4 |
| , IS_FIND_INDEX = TYPE == 6 |
| , NO_HOLES = TYPE == 5 || IS_FIND_INDEX |
| , create = $create || asc; |
| return function($this, callbackfn, that){ |
| var O = toObject($this) |
| , self = IObject(O) |
| , f = ctx(callbackfn, that, 3) |
| , length = toLength(self.length) |
| , index = 0 |
| , result = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined |
| , val, res; |
| for(;length > index; index++)if(NO_HOLES || index in self){ |
| val = self[index]; |
| res = f(val, index, O); |
| if(TYPE){ |
| if(IS_MAP)result[index] = res; // map |
| else if(res)switch(TYPE){ |
| case 3: return true; // some |
| case 5: return val; // find |
| case 6: return index; // findIndex |
| case 2: result.push(val); // filter |
| } else if(IS_EVERY)return false; // every |
| } |
| } |
| return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : result; |
| }; |
| }; |
