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var isIndex = require('../internal/isIndex'),
isKey = require('../internal/isKey'),
isObject = require('../lang/isObject'),
toPath = require('../internal/toPath');
/**
* Sets the property value of `path` on `object`. If a portion of `path`
* does not exist it's created.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to augment.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @returns {Object} Returns `object`.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.set(object, 'a[0].b.c', 4);
* console.log(object.a[0].b.c);
* // => 4
*
* _.set(object, 'x[0].y.z', 5);
* console.log(object.x[0].y.z);
* // => 5
*/
function set(object, path, value) {
if (object == null) {
return object;
}
var pathKey = (path + '');
path = (object[pathKey] != null || isKey(path, object)) ? [pathKey] : toPath(path);
var index = -1,
length = path.length,
lastIndex = length - 1,
nested = object;
while (nested != null && ++index < length) {
var key = path[index];
if (isObject(nested)) {
if (index == lastIndex) {
nested[key] = value;
} else if (nested[key] == null) {
nested[key] = isIndex(path[index + 1]) ? [] : {};
}
}
nested = nested[key];
}
return object;
}
module.exports = set;
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