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August 24, 2017 08:54
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dolly.js
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// | |
// deep object cloning with pure javascript (jquery "extend" function based) | |
// | |
// full documantation : http://api.jquery.com/jquery.extend/ | |
// | |
var dolly = function() { | |
var options, name, src, copy, copyIsArray, clone, target = arguments[0] || {}, i = 1, length = arguments.length, deep = false; | |
if (typeof target === "boolean") { | |
deep = target; target = arguments[ i ] || {}; i++; | |
} | |
if (typeof target !== "object" && !this.isFunction(target)) { | |
target = {}; | |
} | |
if (i === length) { | |
target = this; i--; | |
} | |
for (; i < length; i++) { | |
if ((options = arguments[ i ]) !== null) { | |
for (name in options) { | |
src = target[name]; | |
copy = options[name]; | |
if (target === copy) { | |
continue; | |
} | |
if (deep && copy && ( (this.isPlainObject(copy)) || | |
(copyIsArray = (this.isArray(copy))) )) { | |
if (copyIsArray) { | |
copyIsArray = false; | |
clone = src && (this.isArray(src)) ? src : []; | |
} else { | |
clone = src && (this.isPlainObject(src)) ? src : {}; | |
} | |
target[name] = this.dolly( deep, clone, copy ); | |
} else if (copy !== undefined) { | |
target[name] = copy; | |
} | |
} | |
} | |
} return target; | |
}; |
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