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module.exports = clone;
// via http://stackoverflow.com/a/728694/22617
function clone(obj) {
// Handle the 3 simple types, and null or undefined
if (null === obj || 'object' !== typeof obj) {
return obj;
}
var copy;
// Handle Date
if (obj instanceof Date) {
copy = new Date();
copy.setTime(obj.getTime());
return copy;
}
// Handle Array
if (obj instanceof Array) {
copy = [];
for (var i = 0, len = obj.length; i < len; i++) {
copy[i] = clone(obj[i]);
}
return copy;
}
// Handle Object
if (obj instanceof Object) {
copy = {};
for (var attr in obj) {
if (obj.hasOwnProperty && obj.hasOwnProperty(attr)) {
copy[attr] = clone(obj[attr]);
}
}
return copy;
}
throw new Error('Unable to copy obj! Its type isn\'t supported.');
} |