Right in the Center (js string algorithm) codewars https://www.codewars.com/kata/5f5da7a415fbdc0001ae3c69/train/javascript function isInMiddle(seq) { // your goes below let str = seq.replace(/abc/g, `$`); let left = str.slice(0, str.indexOf(`$`)); le…
方案1http://www.cnblogs.com/loogn/archive/2011/06/20/2085165.html String.prototype.format = function(args) { var result = this; if (arguments.length > 0) { if (arguments.length == 1 && typeof (args) == "object") { for (var key in args)…
//https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String//返回对应索引的字符 chartAt() //返回对应所引的字符的统一码(Unicode value) charCodeAt() //Returns a non-negative integer that is the UTF-16 encoded code point value at the given posit…