aboutsummaryrefslogtreecommitdiff
path: root/node_modules/core-js/library/modules/_array-copy-within.js
diff options
context:
space:
mode:
Diffstat (limited to 'node_modules/core-js/library/modules/_array-copy-within.js')
-rw-r--r--node_modules/core-js/library/modules/_array-copy-within.js26
1 files changed, 26 insertions, 0 deletions
diff --git a/node_modules/core-js/library/modules/_array-copy-within.js b/node_modules/core-js/library/modules/_array-copy-within.js
new file mode 100644
index 00000000..d331576c
--- /dev/null
+++ b/node_modules/core-js/library/modules/_array-copy-within.js
@@ -0,0 +1,26 @@
+// 22.1.3.3 Array.prototype.copyWithin(target, start, end = this.length)
+'use strict';
+var toObject = require('./_to-object');
+var toAbsoluteIndex = require('./_to-absolute-index');
+var toLength = require('./_to-length');
+
+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 = Math.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;
+};