虽然很简单,就是个for循环,if判断。。 但也可能会有同学表示晕啊,看不懂。 看不明白不要紧,我大概讲下,具体怎么比较的。。 首先我们看这个函数,它接收一个数组做为参数, 那传入之后, 在这个函数中的arr就是一个数组,对它使用join方法, 将这个数组转为一个字符串,并用逗号分隔。 然后呢,声明一个变量b,把...
varexp=null;if(isNull(exp)){alert("is null");} 判断字符串是否为空 s 匹配任何空白字符,包括空格、制表符、换页符等等。等价于 fnrtv。 很多情况下,都是用length来直接判断字符串是否为空,如下: 代码如下: 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 varstrings='';if(string.length...
So with the understanding of theindexOfmethod, we can make use of it to check if the string contains spaces by passing a whitespace string to the method. Since the method returns an index when a whitespace exists, we can check if the value is greater than or equal to zero which returns...
var s=parseFloat(trim(name.value));if(isNaN(s)) { alert(str); name.focus();returntrue; }elsereturnfalse; }//---检查输入的值,小数点后的位数---function checknumber(value, num, str) {if(value != "") {if(value.indexOf(".") > 0) { var temp= value.length - (value.indexOf("...
if(index==-1) return false; return true; } /* 用途:检查输入的起止日期是否正确,规则为两个日期的格式正确, 且结束如期>=起始日期 输入: startDate:起始日期,字符串 endDate:结束如期,字符串 返回: 如果通过验证返回true,否则返回false */ function checkTwoDate( startDate,endDate ) { if( !isDate...
Supports filtering of multiple data types, including string, number, dropdown, cascade, region, date, and time. @kolirt/vue-web3-auth - 💎 Web3 authentication for Vue3 apps based on WalletConnect v2 and wagmi zoom-image - A little yet powerful framework agnostic library to zoom image on...
{ "type": "AssignmentExpression", "operator": "=", "left": { "type": "Identifier", "name": "hello" }, "right": { "type": "StringLiteral", "value": "world" } }When one is not capable of true intelligence, it is good to consult with someone of good sense. An advisor will...
string platform: 'web | alipay | wechat' 目标构建平台也可配合构建命令通过约定的环境变量(UAPM_PLATFORM)在package.json的构建命令中进行指定,同时配置取值优先级配置参数高于环境变量 { "name": "", "version": "0.0.1", "scripts": { "build:web": "cross-env UAPM_PLATFORM=web npm run build",...
Bootstrap Icons is an open source SVG icon library featuring over 1,800 glyphs, with more added every release. They're designed to work in any project, whether you use Bootstrap itself or not. Use them as SVGs or icon fonts—both options give you vector scaling and easy customization via...
Type:string If provided, and the element does not already have anid, this value is used as theidof the player element. inactivityTimeout Type:number Video.js indicates that the user is interacting with the player by way of the"vjs-user-active"and"vjs-user-inactive"classes and the"useract...