deep cloning of objects and arrays
offers foolproof _deep cloning_ of objects, arrays, numbers, strings etc. in JavaScript.
npm install clone
(It also works with browserify, ender or standalone.)
~~~ javascript
var clone = require('clone');
var a, b;
a = { foo: { bar: 'baz' } }; // initial value of a
b = clone(a); // clone a -> b
a.foo.bar = 'foo'; // change a
console.log(a); // show a
console.log(b); // show b
~~~
This will print:
~~~ javascript
{ foo: { bar: 'foo' } }
{ foo: { bar: 'baz' } }
~~~
clone masters cloning simple objects (even with custom prototype), arrays,
Date objects, and RegExp objects. Everything is cloned recursively, so that you
can clone dates in arrays in objects, for example.
clone(val, circular, depth)
* val -- the value that you want to clone, any type allowed
* circular -- boolean
Call clone with circular set to false if you are certain that obj
contains no circular references. This will give better performance if needed.
There is no error if undefined or null is passed as obj.
* depth -- depth to which the object is to be cloned (optional,
defaults to infinity)
clone.clonePrototype(obj)
* obj -- the object that you want to clone
Does a prototype clone as
described by Oran Looney.
~~~ javascript
var a, b;
a = { hello: 'world' };
a.myself = a;
b = clone(a);
console.log(b);
~~~
This will print:
~~~ javascript
{ hello: "world", myself: [Circular] }
~~~
So, b.myself points to b, not a. Neat!
npm test
Some special objects like a socket or process.stdout/stderr are known to not
be cloneable. If you find other objects that cannot be cloned, please open an
issue.
If you encounter any bugs or issues, feel free to open an issue at
github or send me an email to
Copyright © 2011-2015 Paul Vorbach and
contributors.
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the “Software”), to deal in
the Software without restriction, including without limitation the rights to
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the Software, and to permit persons to whom the Software is furnished to do so,
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