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- import hasOwnProp from './has-own-prop';
- export default function extend(a, b) {
- for (var i in b) {
- if (hasOwnProp(b, i)) {
- a[i] = b[i];
- }
- }
- if (hasOwnProp(b, 'toString')) {
- a.toString = b.toString;
- }
- if (hasOwnProp(b, 'valueOf')) {
- a.valueOf = b.valueOf;
- }
- return a;
- }
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