diff options
Diffstat (limited to 'node_modules/core-js/modules/esnext.map.reduce.js')
| -rw-r--r-- | node_modules/core-js/modules/esnext.map.reduce.js | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/esnext.map.reduce.js b/node_modules/core-js/modules/esnext.map.reduce.js new file mode 100644 index 0000000..2b22fda --- /dev/null +++ b/node_modules/core-js/modules/esnext.map.reduce.js @@ -0,0 +1,29 @@ +'use strict'; +var $ = require('../internals/export'); +var IS_PURE = require('../internals/is-pure'); +var anObject = require('../internals/an-object'); +var aFunction = require('../internals/a-function'); +var getMapIterator = require('../internals/get-map-iterator'); +var iterate = require('../internals/iterate'); + +// `Map.prototype.reduce` method +// https://github.com/tc39/proposal-collection-methods +$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, { + reduce: function reduce(callbackfn /* , initialValue */) { + var map = anObject(this); + var iterator = getMapIterator(map); + var noInitial = arguments.length < 2; + var accumulator = noInitial ? undefined : arguments[1]; + aFunction(callbackfn); + iterate(iterator, function (key, value) { + if (noInitial) { + noInitial = false; + accumulator = value; + } else { + accumulator = callbackfn(accumulator, value, key, map); + } + }, { AS_ENTRIES: true, IS_ITERATOR: true }); + if (noInitial) throw TypeError('Reduce of empty map with no initial value'); + return accumulator; + } +}); |
