js集合工具类

/**
*js集合工具类
* Created by cd on 2016/7/14
*/
define('module/statistics/utils/commonUtil', function (require, exports, module) {

var commonUtil = function () {
var that = this;
};

commonUtil.prototype = {
/**
* 抽取对象集合元素形成新的对象集合，并且根据attr过滤重复元素
* @param objList
* @param attrArray
* @returns {Array}
*/
extractToList: function (objList, attrArray) {
var that = this;
var result = [];
var filterKey = '';
for (var i = 0; i < objList.length; i++) {
var obj = objList[i];
var newObj = {};
for (var j = 0; j < attrArray.length; j++) {
var key = attrArray[j];
var value = obj[key];
if (j==0 && value && filterKey.indexOf(value) != -1) {//通过第一个key判断第一个值是否有重复的
break;
}
newObj[key] = value;
if(j==0){
filterKey += value + "_";
}
}
if (!that.isEmptyObject(newObj)) {
result.push(newObj);
}

}
return result;
},
/**
* 判断一个json对象是否为空
* @param obj
* @returns {boolean}
*/
isEmptyObject: function (obj) {
var t;
for (t in obj)
return false;
return true;
},
/**
* 获得 echarts init dom 所需要的宽度
* @returns {*|jQuery}
*/
getEChartsPanelWidth: function () {
return $('.tab-content:first').width();
}

};

module.exports = new commonUtil();
});