repeat()方法接收一个整数参数,表示要将字符串复制多少次,然后返回拼接所有副本后的结果。如果传入的这个参数为负值,或者超过了字符串的最大长度,将抛出错误;如果是一个小数,则向下取整。 const str = "abc"; console.log(str.repeat(-1)); // 报错:RangeError: Invalid count value: -1 console.log(str.re...
slice,repeat slice() 方法提取字符串的一部分,并返回一个新的字符串,且不会改动原字符串。 repeat() 构造并返回一个新字符串,按指定数量克隆字符串。 function phone(number,start = 5,len = 4){ number = String(number); return number.slice(0,start-1) + '*'.repeat(len) + number.slice(start...
functioneveryNth(arr, nth) {returnarr.filter((v, i) => i % nth === nth - 1); } 返回数组中第 n 个元素 支持负数 functionnthElement(arr, n = 0) {return(n >= 0 ? arr.slice(n, n + 1) : arr.slice(n))[0]; } 数组乱排 functionshuffle(arr) { let array=arr; let index=...
console.log("现在是:"+year+'年'+month+'月'+dates+'日 '+hours+':'+minutes+':'+seconds+' '+arr[day]);结果:现在是:2022年2月24日 20:54:43 星期四 2、格式化日期 时分秒 function getTime() { let date = new Date(); let year = date.getFullYear(); let month = date.getMonth...
This will callloadExtraFiles()after 5 seconds, which should load the files you need (using$import). You can even have a function at the end of these imported files that does whatever initialization is needed (or calls an existing function to do the initialization). ...
a * num (repeat string <num> times) # Special Operations [[Link]].value (fetch `value` from page `Link`) 使用如下: test:: 测试变量 ```dataviewjs dv.paragraph(dv.evaluate("x + y + z", {x: 1, y: 2, z: 3}).value) // 6 ...
Calculating yrs, months, days, hours, mins, seconds between two dates. SQL Call a Class file in Asp.net Web Application call a vbscript function Call action method from middleware class call anchor tag onclick in aspx.cs file call asmx with HttpWebRequest who returns json Call Async Task ...
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function getSize(e) { //获取目标的宽高 return { height: e.offsetHeight, width: e.offsetWidth, }; } function checkSize(i) { //判断目标大小是否符合要求 var s = getSize(i); //获取目标的宽高 return ( s.height > minHeight &&
function noRepeat(arr){return[...newSet(arr)]; } 查找数组最大 function arrayMax(arr){returnMath.max(...arr); } 查找数组最小 function arrayMin(arr){returnMath.min(...arr); } 返回已 size 为长度的数组分割的原数组 function chunk(arr, size = 1){returnArray.from( {length:Math.ce...