javascript实用拓展

布满荆棘的人生 2022-06-01 07:38 193阅读 0赞

#### javascript实用拓展 ####

// 清除两边的空格 
    String.prototype.trim = function() {   
        return this.replace(/(^\s*)|(\s*$)/g, '');  
    };  
    // 合并多个空白为一个空白 
    String.prototype.ResetBlank = function() {   
        var regEx = /\s+/g;  
        return this.replace(regEx, ' ');  
    };  
    
    // 保留数字 
    String.prototype.GetNum = function() {   
        var regEx = /[^\d]/g;  
        return this.replace(regEx, '');  
    };  
    
    // 保留中文 
    String.prototype.GetCN = function() {   
        var regEx = /[^\u4e00-\u9fa5\uf900-\ufa2d]/g;  
        return this.replace(regEx, '');  
    };  
    
    // String转化为Number 
    String.prototype.ToInt = function() {   
        return isNaN(parseInt(this)) ? this.toString() : parseInt(this);  
    };  
    
    // 得到字节长度 
    String.prototype.GetLen = function() {   
        var regEx = /^[\u4e00-\u9fa5\uf900-\ufa2d]+$/;  
        if (regEx.test(this)) {  
            return this.length * 2;  
        } else {  
            var oMatches = this.match(/[\x00-\xff]/g);  
            var oLength = this.length * 2 - oMatches.length;  
            return oLength;  
        }  
    };  
    
    // 获取文件全名 
    String.prototype.GetFileName = function() {   
        var regEx = /^.*\/([^\/\?]*).*$/;  
        return this.replace(regEx, '$1');  
    };  
    
    // 获取文件扩展名 
    String.prototype.GetExtensionName = function() {   
        var regEx = /^.*\/[^\/]*(\.[^\.\?]*).*$/;  
        return this.replace(regEx, '$1');  
    };  
    
    //替换所有
    String.prototype.replaceAll = function(reallyDo, replaceWith, ignoreCase) {   
        if (!RegExp.prototype.isPrototypeOf(reallyDo)) {  
            return this.replace(new RegExp(reallyDo, (ignoreCase ? "gi" : "g")), replaceWith);  
        } else {  
            return this.replace(reallyDo, replaceWith);  
        }  
    };  
    //格式化字符串
    String.Format = function() {   
        if (arguments.length == 0) {  
            return '';  
        }  
    
        if (arguments.length == 1) {  
            return arguments[0];  
        }  
    
        var reg = /{(\d+)?}/g;  
        var args = arguments;  
        var result = arguments[0].replace(reg, function($0, $1) {   
            return args[parseInt($1) + 1];  
        });  
        return result;  
    };  
    
    // 数字补零 
    Number.prototype.LenWithZero = function(oCount) {   
        var strText = this.toString();  
        while (strText.length < oCount) {  
            strText = '0' + strText;  
        }  
        return strText;  
    };  
    
    // Unicode还原 
    Number.prototype.ChrW = function() {   
        return String.fromCharCode(this);  
    };  
    
    // 数字数组由小到大排序 
    Array.prototype.Min2Max = function() {   
        var oValue;  
        for (var i = 0; i < this.length; i++) {  
            for (var j = 0; j <= i; j++) {  
                if (this[i] < this[j]) {  
                    oValue = this[i];  
                    this[i] = this[j];  
                    this[j] = oValue;  
                }  
            }  
        }  
        return this;  
    };  
    
    // 数字数组由大到小排序 
    Array.prototype.Max2Min = function() {   
        var oValue;  
        for (var i = 0; i < this.length; i++) {  
            for (var j = 0; j <= i; j++) {  
                if (this[i] > this[j]) {  
                    oValue = this[i];  
                    this[i] = this[j];  
                    this[j] = oValue;  
                }  
            }  
        }  
        return this;  
    };  
    
    // 获得数字数组中最大项 
    Array.prototype.GetMax = function() {   
        var oValue = 0;  
        for (var i = 0; i < this.length; i++) {  
            if (this[i] > oValue) {  
                oValue = this[i];  
            }  
        }  
        return oValue;  
    };  
    
    // 获得数字数组中最小项 
    Array.prototype.GetMin = function() {   
        var oValue = 0;  
        for (var i = 0; i < this.length; i++) {  
            if (this[i] < oValue) {  
                oValue = this[i];  
            }  
        }  
        return oValue;  
    };  
    
    //添加天
    Date.prototype.addDays = function (d) { 
        this.setDate(this.getDate() + d);
    };
    
    //添加周
    Date.prototype.addWeeks = function (w) { 
        this.addDays(w * 7);
    };
    
    //添加月
    Date.prototype.addMonths = function (m) { 
        var d = this.getDate();
        this.setMonth(this.getMonth() + m);
        if (this.getDate() < d)
            this.setDate(0);
    };
    
    //添加年
    Date.prototype.addYears = function (y) { 
        var m = this.getMonth();
        this.setFullYear(this.getFullYear() + y);
        if (m < this.getMonth()) {
            this.setDate(0);
        }
    };
    
    // 获取当前时间的中文形式 
    Date.prototype.GetCNDate = function() {   
        var oDateText = '';  
        oDateText += this.getFullYear().LenWithZero(4) + new Number(24180).ChrW();  
        oDateText += (this.getMonth()+1).LenWithZero(2) + new Number(26376).ChrW();  
        oDateText += this.getDate().LenWithZero(2) + new Number(26085).ChrW();  
        oDateText += this.getHours().LenWithZero(2) + new Number(26102).ChrW();  
        oDateText += this.getMinutes().LenWithZero(2) + new Number(20998).ChrW();  
        oDateText += this.getSeconds().LenWithZero(2) + new Number(31186).ChrW();  
        oDateText += new Number(32).ChrW() + new Number(32).ChrW() + new Number(26143).ChrW() + new Number(26399).ChrW() + new String('26085199682010819977222352011620845').substr(this.getDay() * 5, 5).ToInt().ChrW();  
        return oDateText;  
    };  
    //扩展Date格式化 
    Date.prototype.Format = function(format) {   
        var o = {  
            "M+": this.getMonth() + 1, //月份 
            "d+": this.getDate(), //日 
            "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12, //小时 
            "H+": this.getHours(), //小时 
            "m+": this.getMinutes(), //分 
            "s+": this.getSeconds(), //秒 
            "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
            "S": this.getMilliseconds() //毫秒 
        };  
        var week = {  
            "0": "\u65e5",  
            "1": "\u4e00",  
            "2": "\u4e8c",  
            "3": "\u4e09",  
            "4": "\u56db",  
            "5": "\u4e94",  
            "6": "\u516d"  
        };  
        if (/(y+)/.test(format)) {  
            format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));  
        }  
        if (/(E+)/.test(format)) {  
            format = format.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "\u661f\u671f" : "\u5468") : "") + week[this.getDay() + ""]);  
        }  
        for (var k in o) {  
            if (new RegExp("(" + k + ")").test(format)) {  
                format = format.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));  
            }  
        }  
        return format;  
    }  
    Date.prototype.Diff = function(interval, objDate) {   
        //若参数不足或 objDate 不是日期类型則回传 undefined 
        if (arguments.length < 2 || objDate.constructor != Date) { return undefined; }  
        switch (interval) {  
            //计算秒差 
            case 's': return parseInt((objDate - this) / 1000);  
                //计算分差 
            case 'n': return parseInt((objDate - this) / 60000);  
                //计算時差 
            case 'h': return parseInt((objDate - this) / 3600000);  
                //计算日差 
            case 'd': return parseInt((objDate - this) / 86400000);  
                //计算周差 
            case 'w': return parseInt((objDate - this) / (86400000 * 7));  
                //计算月差 
            case 'm': return (objDate.getMonth() + 1) + ((objDate.getFullYear() - this.getFullYear()) * 12) - (this.getMonth() + 1);  
                //计算年差 
            case 'y': return objDate.getFullYear() - this.getFullYear();  
                //输入有误 
            default: return undefined;  
        }  
    };  
    
    //检测是否为空 
    Object.prototype.IsNullOrEmpty = function() {   
        var obj = this;  
        var flag = false;  
        if (obj == null || obj == undefined || typeof (obj) == 'undefined' || obj == '') {  
            flag = true;  
        } else if (typeof (obj) == 'string') {  
            obj = obj.trim();  
            if (obj == '') {
       //为空 
                flag = true;  
            } else {
       //不为空 
                obj = obj.toUpperCase();  
                if (obj == 'NULL' || obj == 'UNDEFINED' || obj == '{}') {  
                    flag = true;  
                }  
            }  
        }  
        else {  
            flag = false;  
        }  
        return flag;
    }
    
    //判断数组中是否包含某个元素
    Array.prototype.contains = function (obj) { 
        var i = this.length;
        while (i--) {
            if (this[i] === obj) {
    
                return true;
    
            }
        }
        return false;
    }
    
    //求数组中最大
    //Math.max.apply(null,array)
    Array.prototype.max = function(){ 
        return Math.max.apply(null,this);
    }
    //求数组中最小
    //Math.min.apply(null,array)
    Array.prototype.min = function(){ 
        return Math.min.apply(null,this);
    }