utils.js

//记录集中查找位置
    findIndex: function (id, feild, arr) {
        let index = -1,
            tem = [];
        if (id && feild && arr && arr.length) {
            arr.forEach((t, i) => {
                tem.push(t[feild]);
            });
            index = tem.indexOf(id);
        }
        return index;
    },
  
//日期格式化
    formatDate (date, fmt) {
        var o = {
            "M+": date.getMonth() + 1,                 //月份
            "d+": date.getDate(),                    //日
            "h+": date.getHours(),                   //小时
            "m+": date.getMinutes(),                 //分
            "s+": date.getSeconds(),                 //秒
            "q+": Math.floor((date.getMonth() + 3) / 3), //季度
            "S": date.getMilliseconds()             //毫秒
        };
        if (/(y+)/.test(fmt)) {
            fmt = fmt.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
        }
        for (var k in o) {
            if (new RegExp("(" + k + ")").test(fmt)) {
                fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
            }
        }
        return fmt;
    },
  
  //千分位处理
    thousands: function (num) {
        if (typeof num !== 'number') return 0;
        return (num.toFixed(2) + '').replace(/\d{1,3}(?=(\d{3})+(\.\d*)?$)/g, '$&,');
    },
  
  // 首字母大写
    capitalize: function (str) {
        return str.substring(0,1).toUpperCase() + str.substring(1);
    },
    // 处理简写数组
    calcArray: function (list, num, field, name) {
        let arr = [];
        if (list.length) {
            arr = list.map(item => {
                return item[field];
            });
        }
        if (arr.length > num) {
            let s = '';
            for(let i = 0; i < num; i++) {
                if (i > 0) s += ',';
                s += arr[i];
            }
            return s + '等' + arr.length + '个' + name;
        } else return arr.join(',');
    }