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node_modules/core-js/internals/array-iteration.js

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+'use strict';
+var bind = require('../internals/function-bind-context');
+var uncurryThis = require('../internals/function-uncurry-this');
+var IndexedObject = require('../internals/indexed-object');
+var toObject = require('../internals/to-object');
+var lengthOfArrayLike = require('../internals/length-of-array-like');
+var arraySpeciesCreate = require('../internals/array-species-create');
+
+var push = uncurryThis([].push);
+
+// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterReject }` methods implementation
+var createMethod = function (TYPE) {
+  var IS_MAP = TYPE == 1;
+  var IS_FILTER = TYPE == 2;
+  var IS_SOME = TYPE == 3;
+  var IS_EVERY = TYPE == 4;
+  var IS_FIND_INDEX = TYPE == 6;
+  var IS_FILTER_REJECT = TYPE == 7;
+  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+  return function ($this, callbackfn, that, specificCreate) {
+    var O = toObject($this);
+    var self = IndexedObject(O);
+    var boundFunction = bind(callbackfn, that);
+    var length = lengthOfArrayLike(self);
+    var index = 0;
+    var create = specificCreate || arraySpeciesCreate;
+    var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_REJECT ? create($this, 0) : undefined;
+    var value, result;
+    for (;length > index; index++) if (NO_HOLES || index in self) {
+      value = self[index];
+      result = boundFunction(value, index, O);
+      if (TYPE) {
+        if (IS_MAP) target[index] = result; // map
+        else if (result) switch (TYPE) {
+          case 3: return true;              // some
+          case 5: return value;             // find
+          case 6: return index;             // findIndex
+          case 2: push(target, value);      // filter
+        } else switch (TYPE) {
+          case 4: return false;             // every
+          case 7: push(target, value);      // filterReject
+        }
+      }
+    }
+    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+  };
+};
+
+module.exports = {
+  // `Array.prototype.forEach` method
+  // https://tc39.es/ecma262/#sec-array.prototype.foreach
+  forEach: createMethod(0),
+  // `Array.prototype.map` method
+  // https://tc39.es/ecma262/#sec-array.prototype.map
+  map: createMethod(1),
+  // `Array.prototype.filter` method
+  // https://tc39.es/ecma262/#sec-array.prototype.filter
+  filter: createMethod(2),
+  // `Array.prototype.some` method
+  // https://tc39.es/ecma262/#sec-array.prototype.some
+  some: createMethod(3),
+  // `Array.prototype.every` method
+  // https://tc39.es/ecma262/#sec-array.prototype.every
+  every: createMethod(4),
+  // `Array.prototype.find` method
+  // https://tc39.es/ecma262/#sec-array.prototype.find
+  find: createMethod(5),
+  // `Array.prototype.findIndex` method
+  // https://tc39.es/ecma262/#sec-array.prototype.findIndex
+  findIndex: createMethod(6),
+  // `Array.prototype.filterReject` method
+  // https://github.com/tc39/proposal-array-filtering
+  filterReject: createMethod(7)
+};