From e93da8b04da86773247aadb1cbb1912e4f4526b2 Mon Sep 17 00:00:00 2001 From: Priyansh Date: Tue, 22 Dec 2020 17:49:59 +0530 Subject: Rewriting Project --- node_modules/core-js/internals/array-from.js | 41 ++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 node_modules/core-js/internals/array-from.js (limited to 'node_modules/core-js/internals/array-from.js') diff --git a/node_modules/core-js/internals/array-from.js b/node_modules/core-js/internals/array-from.js new file mode 100644 index 0000000..490a3c2 --- /dev/null +++ b/node_modules/core-js/internals/array-from.js @@ -0,0 +1,41 @@ +'use strict'; +var bind = require('../internals/function-bind-context'); +var toObject = require('../internals/to-object'); +var callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing'); +var isArrayIteratorMethod = require('../internals/is-array-iterator-method'); +var toLength = require('../internals/to-length'); +var createProperty = require('../internals/create-property'); +var getIteratorMethod = require('../internals/get-iterator-method'); + +// `Array.from` method implementation +// https://tc39.github.io/ecma262/#sec-array.from +module.exports = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) { + var O = toObject(arrayLike); + var C = typeof this == 'function' ? this : Array; + var argumentsLength = arguments.length; + var mapfn = argumentsLength > 1 ? arguments[1] : undefined; + var mapping = mapfn !== undefined; + var iteratorMethod = getIteratorMethod(O); + var index = 0; + var length, result, step, iterator, next, value; + if (mapping) mapfn = bind(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2); + // if the target is not iterable or it's an array with the default iterator - use a simple case + if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) { + iterator = iteratorMethod.call(O); + next = iterator.next; + result = new C(); + for (;!(step = next.call(iterator)).done; index++) { + value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value; + createProperty(result, index, value); + } + } else { + length = toLength(O.length); + result = new C(length); + for (;length > index; index++) { + value = mapping ? mapfn(O[index], index) : O[index]; + createProperty(result, index, value); + } + } + result.length = index; + return result; +}; -- cgit v1.2.3