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Example of using string trim () in JS, jstrim
Example 1:
<Head> <title> test JS Extension Method </title> <script type = "text/javascript"> // Merge multiple spaces into one blank String. prototype. resetBlank = function () {// extend var regEx =/\ s +/g; return this. replace (regEx, '') ;}; window. onload = function () {var str = "are you sure you want to be okay? "; Alert (str); str = str. ResetBlank (); // you can call it. It is similar to C! Alert (str) ;}</script>
Example 2:
// Clear the space String on both sides. prototype. trim = function () {return this. replace (/(^ \ s *) | (\ s * $)/g, '') ;}; // Merge multiple spaces 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, '') ;}; // retain the Chinese String. prototype. getCN = function () {var regEx =/[^ \ u4e00-\ u9fa5 \ uf900-\ ufa2d]/ G; return this. replace (regEx, '') ;}; // convert String to Number String. prototype. ToInt = function () {return isNaN (parseInt (this ))? This. toString (): parseInt (this) ;}; // obtain the byte length 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 ;}}; // get the full name of the file String. prototype. getFileName = function () {var regEx =/^. * \/([^ \/\?] *). * $/; Return this. replace (regEx, '$ 1') ;}; // get the file extension String. prototype. getExtensionName = function () {var regEx =/^. * \/[^ \/] * (\. [^ \. \?] *). * $/; Return this. replace (regEx, '$ 1') ;}; // replace all strings. 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 ($0, $1) {return args [parseInt ($1) + 1] ;}); return result ;}; // Add a Number to zero 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) ;}; // The number array is composed Small to large sort 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 ;}; // The number Array is sorted from large to small. 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 ;}; // obtain the largest Array in the number Array. prototype. getMax = function () {var oValue = 0; for (var I = 0; I <this. length; I ++) {if (this [I]> oValue) {oValue = this [I] ;}return oValue ;}; // obtain the smallest Array of numbers. prototype. getMin = function () {var oValue = 0; for (var I = 0; I <this. length; I ++) {if (this [I] <oValue) {oValue = this [I] ;}} return OValue ;}; // obtain the Chinese Date of the current time. 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. getMi Nutes (). 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 ('20140901 '). 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, // Hour "H +": this. getHours (), // Hour "m +": this. getMinutes (), // minute "s +": this. getSeconds (), // second "q +": Math. floor (this. getMonth () + 3)/3), // quarter "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. getFullY Ear () + ""). 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) {// return undefined if (arguments. length <2 | objDate. constructor! = Date) {return undefined;} switch (interval) {// calculate the second difference case's ': return parseInt (objDate-this)/1000 ); // calculate the deviation case 'N': return parseInt (objDate-this)/60000); // calculate the time difference case 'H': return parseInt (objDate-this) /3600000); // calculate the daily variance case 'D': return parseInt (objDate-this)/86400000); // calculate the weekly variance case 'W ': return parseInt (objDate-this)/(86400000*7); // calculate the monthly difference case 'M': return (objDate. getMonth () + 1) + (objDate. getFullYear ()-this. getFullYear () * 12)-(this. getMonth () + 1); // calculate the year difference case 'y': return objDate. getFullYear ()-this. getFullYear (); // incorrect input default: return undefined ;}}; // check whether the Object is empty. 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 = '') {// null flag = true;} else {// not empty obj = obj. toUpperCase (); if (obj = 'null' | obj = 'undefined' | obj = '{}') {flag = true ;}}} else {flag = false;} return flag;
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