* @return*/String.prototype.strStartsWith=function(str) {returnthis.substr(0, str.length) ==str; };/** 判断密码安全级别 * @return*/String.prototype.checkPassWordLevel=function() {varn = 0;if(/\d/.test(this)) n++;//包含数字if(/[a-z]/.test(this)) n++;//包含小写字母if(/[A-Z...
字符串右侧填充(rpad(string,char,length)) 使用方法同lpad,只是一个是左侧,一个是右侧 去除空字符(右侧)(rtrim) 正则切分(str2RegExp) 出入一个正则表达式,对string字符串进行Split操作.代码如下: 1. var strToMatch = "info@proconis.de"; 2. var strReg = "^(\\w+)@([a-zA-Z_]+?)\\.([a-...
if (!String.prototype.includes) { Object.defineProperty(String.prototype, 'includes', { value: function(substring, searchposition) { if (typeof searchposition!== 'number') { searchposition= 0 } if (searchposition+ substring.length > this.length) { return false } else { return this.i...
2017-05-03 17:51 −1、获取字符串最后一位 方法一: 运用String对象下的charAt方法 charAt() 方法可返回指定位置的字符。 代码如下: str.charAt(str.length-1) 方法二: 运用String对象下的substr方法 substr() 方法可在字符串中抽取从start下标开... ...
function checkePlugs(pluginname) { var f = "-" var plugins = navigator.plugins; if (plugins.length > 0) { for (i = 0; i < navigator.pluginslength; i++) { if (navigatorplugins[i].name.indexOf(plugin) >= 0) { f = navigator.plugins[i.descriptionsplit(pluginname)[1...
constarray=[3,8,12,6,10,2];// Find 10 in the given array.functioncheckForN(arr,n){for(leti=0;i<array.length;i++){if(n===array[i]){return`${true}${n}exists at index${i}`;}}return`${false}${n}does not exist in the given array.`;}checkForN(array,10); ...
The other pointer at the end of the string ? let right = cleanedStr.length - 1; Move the pointers inward, checking for character equality ? while (left < right) { left++; right--; } Example Below is an example to find if the string is a palindrome using the Two-Pointer Technique ...
In the above program, an Armstrong number of n digits is checked. When the user enters a number, it is taken as a string. The length property returns the length of a string. The number entered by the user is stored in a temp variable. And a while loop is used to iterate until its...
The string to search for. lengthOptional. The length of the string to search. Default value is the length of the string. Return Value TypeDescription A booleantrueif the string ends with the value, otherwisefalse. More Examples Check if the 11 first characters of a string ends with "world...
对于前端工程师来说, 正则表达式也许是javascript语言中最晦涩难懂的, 但是也往往是最简洁的.工作中遇到的很多问题,诸如搜索,查找, 高亮关键字等都可以使用正则轻松解决,所以有句话说的好: 正则用的好, 加班远离我. 今天笔者就复盘一下javascript正则表达式的一些使用技巧和高级API, 并通过几个实际的案例,来展现正则...