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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | 2x 2x 30x 27x 26x 26x 26x 26x 41x 41x 41x 14x 13x 14x 27x 1x 1x 26x 25x 1x 1x 26x 26x 5x 1x 26x 2x | var $type = require('./type');
var $keyPathSplit = require('../str/keyPathSplit');
/**
* 从对象路径取值(简易版)
* @method obj/get
* @see [lodash.get](https://lodash.com/docs/4.17.15#get)
* @param {Object|Array} obj 要取值的对象或者数组
* @param {String} xpath 要取值的路径
* @param {Any} [defaultValue] 值为 undefined 则取此默认值
* @returns {Any} 取得的值
* @example
* var $get = require('@spore-ui/kit/packages/obj/get');
* var obj = {a: {b: {c: 1}}};
* console.info($get(obj, 'a.b.c'); // 1
* console.info($get(obj, 'e'); // undefined
* console.info($get(obj, 'e', 3); // 3
* var arr = [1, {a: [2, 3]}];
* console.info($get(arr, '[1].a[1]'); // 3
*/
// 引用 lodash/get 会引入超过10kb 代码，用这个方法来精简 sdk 体积
function get(obj, xpath, def) {
if (!obj) return undefined;
if (typeof xpath !== 'string') return undefined;
var arrXpath = $keyPathSplit(xpath);
var point = obj;
var len = arrXpath.length;
var index;
for (index = 0; index < len; index += 1) {
var key = arrXpath[index];
var otype = $type(point);
if (otype === 'array') {
if (/^\d+$/.test(key)) {
key = parseInt(key, 10);
}
point = point[key];
} else if (point === null) {
point = undefined;
break;
} else if (typeof point === 'object') {
point = point[key];
} else {
point = undefined;
break;
}
}
var value = point;
if ($type(value) === 'undefined') {
if ($type(def) !== 'undefined') {
value = def;
}
}
return value;
}
module.exports = get;
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