总结一些通用的处理方法

/*** 判断当前值是否为不为空的数字* @param {数字} num */static isNumber(num){if(num == "") return false;if(isNaN(num) || parseFloat(num).toString() == "NaN"){return false}else{return true;}}/*** 为一个数字增加千分位* @param {*} num */static thousandsForamt(num){if(!this.isNumber(num)) return numvar res = num.toString().replace(/\d+/, function (n) { // 先提取整数部分return n.replace(/(\d)(?=(\d{3})+$)/g, function ($1) {return $1 + ','})})return res}/*** 为所有传进来的值小数补零* @param {需要补0的数字} num * @param {补零的个数，如果不传则默认为两位} digitNum */static fillNumber (num, digitNum) {if (!this.isNumber(num)) {return num}var digit = ''var round = ''if (num === null || num === undefined || num === '') {num = 0.00}var numStr = num.toString()if (numStr.indexOf('.') != -1) {round = numStr.split('.')[0]digit = numStr.split('.')[1]} else {round = numStr}for (var i = digitNum - digit.length; i > 0; i--) {digit = digit + '0'}return round + '.' + digit}/*** 将数字转换为人民币并返回单位* @param {*} num */static getFormatMoney(num) {var ret = {}if (num >= 100000000) {ret.num = Math.round((num / 100000000) * 100) / 100ret.unit = '亿元'} else if (num >= 10000) {ret.num = Math.round((num / 10000) * 100) / 100ret.unit = '万元'} else if (num > 0) {ret.num = numret.unit = '元'} else if (num < 0) {// 负数var num2 = 0 - numif (num2 >= 100000000) {ret.num = 0 - Math.round((num2 / 100000000) * 100) / 100ret.unit = '亿元'} else if (num2 >= 10000) {ret.num = 0 - Math.round((num2 / 10000) * 100) / 100ret.unit = '万元'} else if (num2 >= 0) {ret.num = 0 - numret.unit = '元'}} else {ret.num = '0'ret.unit = '元'}ret.num = Math.round(ret.num * 100) / 100return ret}// 下面两个一起用 可以统一单位 function getMaxNum (arr) {const arr2 = []for (let i in arr) {if (arr[i] == undefined) {arr[i] = 0}arr2.push(Math.abs(arr[i]))}var index = arr2.indexOf(Math.max.apply(null, arr2))// console.log('max=====' + arr[index])return arr2[index] }function getFormatMoney (num, unit) {var ret = {}// console.log(unit);if (num == '') {ret.num = 0ret.unit = 1ret.unitName = '元'return ret}var computenum = numif (num <= 0) {computenum = 0 - num}if (!unit || unit === 0) {if (computenum >= 100000000) {unit = 100000000} else if (computenum >= 10000) {unit = 10000} else {unit = 1}// unit = 10000; // 默认取万元}switch (unit) {case 10000:ret.num = Math.round((num / 10000) * 100) / 100ret.unitName = '万元'ret.unit = unitbreakcase 100000000:ret.num = Math.round((num / 100000000) * 100) / 100ret.unitName = '亿元'ret.unit = unitbreakdefault:ret.num = numret.unitName = '元'ret.unit = 1break}// ret.num = fillNumber(ret.num,2);// alert(ret.num);return ret }/*** 获取某年的某天是第几周* @param {Number} y* @param {Number} m* @param {Number} d* @returns {Number}*/ function getWeekNumber (date) {var year = date.getFullYear()var month = date.getMonth()var days = date.getDate()// 那一天是那一年中的第多少天for (var i = 0; i < month; i++) {days += getMonthDays(year, i)}// 那一年第一天是星期几var yearFirstDay = new Date(year, 0, 1).getDay() || 7var week = null// if (yearFirstDay == 1) {// week = Math.ceil(days / yearFirstDay)// } else {// days -= (7 - yearFirstDay + 1)// week = Math.ceil(days / 7) + 1// }days -= (7 - yearFirstDay + 1)week = Math.ceil(days / 7) + 1return week }// js获取一年有多少周 function getNumOfWeeks (year) {var d = new Date(year, 0, 1)var yt = ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) ? 366 : 365return Math.ceil((yt - d.getDay()) / 7.0) }/*** 对字符串进行Unicode编码* @param str* @returns {string}*/ function decodeStr (str) {var res = []for (var i = 0; i < str.length; i++)res[i] = ('00' + str.charCodeAt(i).toString(16)).slice(-4);return '\\u' + res.join('\\u') }/*** 对unicode编码格式的字符串进行解码* @param str* @returns {string}*/ function undecodeStr (str) {var result = []var strArr = str.split('\\u') //根据 \u 分割var len = strArr.lengthfor (var i = 0; i < len; i++) {if (strArr[i]) {result.push(String.fromCharCode(parseInt(strArr[i], 16))) //16 转 10}}return result.join('') }// 判断设备 function getDeviceType() {let sUserAgent = navigator.userAgent.toLowerCase();if(/ipad/i.test(sUserAgent))return "iPad";if(/iphone/i.test(sUserAgent))return "iPhone";if(/android/i.test(sUserAgent))return "Android";if(/ipod/i.test(sUserAgent))return "iPod";if(/blackberry/i.test(sUserAgent))return "BlackBerry";if(/windows phone/i.test(sUserAgent))return "Windows Phone";return "PC"; }var new_arr = []; var arr=[1,22,44,55,3,1,2,2,4]; function uniqueArrayObj(data){new_arr=[];for(var i=0;i<data.length;i++) { var items=data[i]; //判断元素是否存在于new_arr中，如果不存在则插入到new_ar中if($.inArray(items,new_arr)==-1) { new_arr.push(items); } }return new_arr; }uniqueArrayObj(arr)

转载于:https://www.cnblogs.com/ljh--/p/9553005.html

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