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131 lines
2.1 KiB
131 lines
2.1 KiB
# deepcopy.js |
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[](https://travis-ci.org/sasaplus1/deepcopy.js) |
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[](https://gemnasium.com/sasaplus1/deepcopy.js) |
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[](http://badge.fury.io/js/deepcopy) |
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deep copy for any data |
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## Playground |
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[REPL powered by Tonic](https://tonicdev.com/npm/deepcopy) |
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## Installation |
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```sh |
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$ npm install deepcopy |
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``` |
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## Usage |
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### node.js |
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```js |
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var deepcopy = require("deepcopy"); |
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``` |
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### browser |
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```html |
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<script src="deepcopy.min.js"></script> |
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``` |
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### Example |
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basic usage: |
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```js |
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var base, copy; |
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base = { |
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desserts: [ |
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{ name: "cake" }, |
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{ name: "ice cream" }, |
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{ name: "pudding" } |
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] |
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}; |
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copy = deepcopy(base); |
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base.desserts = null; |
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console.log(base); |
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// { desserts: null } |
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console.log(copy); |
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// { desserts: [ { name: 'cake' }, { name: 'ice cream' }, { name: 'pudding' } ] } |
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``` |
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customize deepcopy: |
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```js |
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function MyClass(id) { |
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this._id = id; |
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} |
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var base, copy; |
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base = { |
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myClasses: [ |
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new MyClass(1), |
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new MyClass(2), |
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new MyClass(3) |
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] |
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}; |
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copy = deepcopy(base, function(target) { |
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if (target.constructor === MyClass) { |
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return new MyClass(target._id); |
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} |
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}); |
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base.myClasses = null; |
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console.log(base); |
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// { myClasses: null } |
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console.log(copy); |
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// { myClasses: [ MyClass { _id: 1 }, MyClass { _id: 2 }, MyClass { _id: 3 } ] } |
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``` |
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## Functions |
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### deepcopy(value[, customizer]) |
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- `value` |
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- `*` - target value |
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- `customizer` |
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- `Function` - customize function |
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- `return` |
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- `*` - copied value |
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support types are below: |
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- Number |
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- String |
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- Boolean |
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- Null |
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- Undefined |
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- Function |
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- shallow copy if it is native function |
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- Date |
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- RegExp |
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- Array |
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- support recursive copy |
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- also can copy if it has circular reference |
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- Object |
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- support recursive copy |
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- also can copy if it has circular reference |
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- Buffer (node.js only) |
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- Symbol |
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## Test |
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```sh |
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$ npm install |
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$ npm test |
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``` |
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## Contributors |
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- [kjirou](https://github.com/kjirou) |
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## License |
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The MIT license. Please see LICENSE file.
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