Example of string trim () use in JS

This article is mainly to introduce the JavaScript extension method string trim () The use of the guide, very simple and practical, the need for small partners can refer to.

Example one:

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Example two:

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Clear both sides of the space String.prototype.trim = function () {return this.replace (^s*) | ( s*$)/g, ""); }; Merges multiple blanks into a blank String.prototype.ResetBlank = function () {var regex =/s+/g; return this.replace (RegEx, ');  //reserved Number String.prototype.GetNum = function () {var regex =/[^d]/g return This.replace (RegEx, ');  //reserved Chinese String.prototype.GetCN = function () {var regex =/[^u4e00-u9fa5uf900-ufa2d]/g return This.replace (RegEx, ''); };  //String converted to Number String.prototype.ToInt = function () {return isNaN (parseint (this))? This.tostring (): parseint ( this); };  //Get byte length String.prototype.GetLen = function () {var regEx =/^[u4e00-u9fa5uf900-ufa2d]+$/; 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;}};  //Get file Full name String.prototype.GetFileName = function () {var regEx =/^.*/([^/?] *).*$/; Return This.replace (regEx, ' $ '); };  //Get file name extension STRING.PRototype. Getextensionname = function () {var regEx =/^.*/[^/]* (. [ ^.?] *).*$/; Return This.replace (regEx, ' $ '); };  //Replace All 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);}}; format string add by Liu Jingning 2010-12-09 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 ($, $) {return Args[parseint ($) + 1];}); return result; };  /Digital complement 0 Number.prototype.LenWithZero = function (ocount) {var strText = this.tostring (); while (Strtext.length < Ocount) {StrText = ' 0 ' + strText;} return strText; };  //unicode Restore Number.prototype.ChrW = function () {return string.fromcharcode (this);  // Numeric arrays are sorted from small to large 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; };  //numeric array from large to small sort Array.prototype.Max2Min = function () {var ovalue; for (var i = 0; i < this.length; i++) {for (VA R j = 0; J <= I; J + +) {if (This[i] > This[j]) {ovalue = This[i]; This[i] = This[j]; This[j] = Ovalue;}} return this; };  //Get the maximum item Array.prototype.GetMax = function () {var ovalue = 0; for (var i = 0; i < this.length; i++) {if ( This[i] > Ovalue) {ovalue = this[i];} return ovalue; };  //Get the minimum item Array.prototype.GetMin = function () {var ovalue = 0; for (var i = 0; i < this.length; i++) {if ( This[i] < Ovalue) {ovalue = this[i];} return ovalue; };  //Get the Chinese form of the current time Date.prototype.GetCNDate = function () {var odatetext = '; Odatetext + = This.getfullyear (). Lenwithzero (4) +New Number (24180). ChrW (); Odatetext + = This.getmonth (). 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; }; Extended Date Format Date.prototype.Format = function (format) {var o = {"m+": This.getmonth () + 1,//month "d+": this.getdate (),//day "h+": this.gethours ()% 12 = 0? 12:this.gethours ()% 12,//h "h+": this.gethours (),//Hour "m+": this.getminutes (),//min "s+": This.getseconds (),//sec "q+" : Math.floor ((This.getmonth () + 3)/3),//Quarterly "S": this.getmilliseconds ()//millisecond}; 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?) "u661fu671f": "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]): (("+ o[k]"). substr (("" + o[k). length));} return format; Date.prototype.Diff = function (interval, objdate) {//If the parameter is insufficient or objdate is not a date type return undefined if (Arguments.length < 2 | | Objdate.constructor!= Date) {return undefined;} switch (interval) {//Calculate seconds Difference case ' s ': Return parseint ((objdate-this) /1000); Calculate the difference case ' n ': Return parseint ((objdate-this)/60000); Calculate time difference case ' h ': Return parseint ((objdate-this)/3600000); Calculate the day difference case ' d ': return parseint ((objdate-this)/86400000); Calculates the week difference case ' W ': Return parseint ((objdate-this)/(86400000 * 7)); Calculate month difference case ' m ': Return (Objdate.getmonth () + 1) + ((Objdate.getfullyear ()-this.getfullyear ())-(This.getmonth () + 1); Calculate the year difference case ' y ': return objdate.getfullyear ()-this.getfullyear (); Input error default:return undefined; } };  //detection is null 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 = = ') {/is empty flag = true;} els e {//is not null obj = Obj.touppercase (); if (obj = = ' NULL ' | | | obj = = ' UNDEFINED ' | |-obj = = ' {} ') {flag = True;}}} else {flag = false;} return flag;

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