diff options
Diffstat (limited to 'node_modules/core-js/modules/es6.array.last-index-of.js')
| -rw-r--r-- | node_modules/core-js/modules/es6.array.last-index-of.js | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/es6.array.last-index-of.js b/node_modules/core-js/modules/es6.array.last-index-of.js new file mode 100644 index 000000000..75c1eabfa --- /dev/null +++ b/node_modules/core-js/modules/es6.array.last-index-of.js @@ -0,0 +1,22 @@ +'use strict'; +var $export = require('./_export') + , toIObject = require('./_to-iobject') + , toInteger = require('./_to-integer') + , toLength = require('./_to-length') + , $native = [].lastIndexOf + , NEGATIVE_ZERO = !!$native && 1 / [1].lastIndexOf(1, -0) < 0; + +$export($export.P + $export.F * (NEGATIVE_ZERO || !require('./_strict-method')($native)), 'Array', { + // 22.1.3.14 / 15.4.4.15 Array.prototype.lastIndexOf(searchElement [, fromIndex]) + lastIndexOf: function lastIndexOf(searchElement /*, fromIndex = @[*-1] */){ + // convert -0 to +0 + if(NEGATIVE_ZERO)return $native.apply(this, arguments) || 0; + var O = toIObject(this) + , length = toLength(O.length) + , index = length - 1; + if(arguments.length > 1)index = Math.min(index, toInteger(arguments[1])); + if(index < 0)index = length + index; + for(;index >= 0; index--)if(index in O)if(O[index] === searchElement)return index || 0; + return -1; + } +});
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