简化长开关语句

本文介绍了简化长开关语句的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要刷新我的javascript，因为它是我最弱的语言，所以我想嘿，让我们做一个简单的'翻译'程序来测试我的技能。好吧，到目前为止我能够将它翻译成一种方式（我还没有翻译过人们输入的东西），但无论如何，它的方式是通过交换机内部的一系列案例。我想知道无论如何我可以简化代码而不是百万个交换机案例。谢谢，这是我的代码。

I need to brush up on my javascript because it is my weakest language, so I thought "Hey lets make a simple 'translating' program to test my skills". Well I was able to make it translate one way so far(I havent worked on untranslating the stuff people input), but anyway the way it does it is by a series of many cases inside a switch. Im wondering if there is anyway I can simplify the code instead of having a million switch cases. Thanks here is my code.

function main() { var get = prompt("Enter what you would like to encode!","At the current time decoding is still a WIP").toLowerCase(); var ina = [...get]; for(i = 0; i < ina.length; i++) { switch(ina[i]) { case "a": ina[i] = "z"; break; case "b": ina[i] = "y"; break; case "c": ina[i] = "x"; break; case "d": ina[i] = "w"; break; case "e": ina[i] = "v"; break; case "f": ina[i] = "u"; break; case "g": ina[i] = "t"; break; case "h": ina[i] = "s"; break; case "i": ina[i] = "r"; break; case "j": ina[i] = "q"; break; case "k": ina[i] = "p"; break; case "l": ina[i] = "o"; break; case "m": ina[i] = "n"; break; case "n": ina[i] = "m"; break; case "o": ina[i] = "l"; break; case "p": ina[i] = "k"; break; case "q": ina[i] = "j"; break; case "r": ina[i] = "i"; break; case "s": ina[i] = "h"; break; case "t": ina[i] = "g"; break; case "u": ina[i] = "f"; break; case "v": ina[i] = "e"; break; case "w": ina[i] = "d"; break; case "x": ina[i] = "c"; break; case "y": ina[i] = "b"; break; case "z": ina[i] = "a"; break; default: ina[i] = ina[i] }; }; var outa = ina.join(""); document.getElementById("output").innerHTML = outa; };

推荐答案

您可以使用具有

You could use an object with properties like

{ a: 'z', b: 'y', c: 'x', // ... z: 'a' }

使用默认值 ina [i] 。

ina[i] = object[ina[i]] || ina[i];