Rewriting Project

1 files changed, 29 insertions, 0 deletions

diff --git a/node_modules/core-js/internals/array-copy-within.js b/node_modules/core-js/internals/array-copy-within.js
new file mode 100644
index 0000000..70c8edb
--- /dev/null
+++ b/node_modules/core-js/internals/array-copy-within.js
@@ -0,0 +1,29 @@
+'use strict';
+var toObject = require('../internals/to-object');
+var toAbsoluteIndex = require('../internals/to-absolute-index');
+var toLength = require('../internals/to-length');
+
+var min = Math.min;
+
+// `Array.prototype.copyWithin` method implementation
+// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin
+module.exports = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
+  var O = toObject(this);
+  var len = toLength(O.length);
+  var to = toAbsoluteIndex(target, len);
+  var from = toAbsoluteIndex(start, len);
+  var end = arguments.length > 2 ? arguments[2] : undefined;
+  var count = min((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
+  var inc = 1;
+  if (from < to && to < from + count) {
+    inc = -1;
+    from += count - 1;
+    to += count - 1;
+  }
+  while (count-- > 0) {
+    if (from in O) O[to] = O[from];
+    else delete O[to];
+    to += inc;
+    from += inc;
+  } return O;
+};