Question

所以我正在用html5 / javascript编写一个在线疯狂的lib应用程序，截至目前我个人删除了我希望用户替换的单词，并注入了它们的值。我想让程序循环一个字符串（故事）并用数组中的每个字母替换我选择的单词，并输入他们输入的单词。举个例子，如果我想让Noun1成为单词“hill”，他们为Noun1输入的单词是“ferret”，那么每当故事说“hill”时，它将被替换为“ferret”。使用字符串和数组是最好的行动方案还是有更好的方法？你能不能告诉我如何在java脚本中循环一个字符串以及如何替换值？

这就是我现在所拥有的。

 function makeML(){
   //get variables from form
   var firstNoun = window.document.myForm.txtfirstNoun.value;
   var secondNoun = document.myForm.txtsecondNoun.value;
   var firstVerb = document.myForm.txtfirstVerb.value;
   var thirdNoun = document.myForm.txtthirdNoun.value;
   var fourthNoun = document.myForm.txtfourthNoun.value;
   var secondVerb = document.myForm.txtsecondVerb.value;
   var firstBody = document.myForm.txtfirstBody.value;
   var story = "";
   story = "Hansel and Gretel sat by the " ;
   story += firstNoun;
   story += ". and when noon came, each ate a little piece of ";
   story += secondNoun;
   story += ", and as they heard the  ";
   story += firstVerb;
   story += " of the wood-axe, they believed that their father was near. It was not the  axe; however, but a ";
   story += thirdNoun;
   story += " which he had fastened to a ";
   story += fourthNoun;
   story += " which the wind was blowing backwards and forwards. And as they had been ";
   story +=  secondVerb; 
   story += " such a long time, their ";
   story +=  firstBody; 
   story += " closed with fatigue, and they fell fast asleep." 

   story += "!\"  \nThe End.... or is it."

   document.myForm.txtStory.value = story;

我有更多，但没有必要展示，除非你们因为任何原因需要更新。

Answer 1

要替换JavaScript字符串中的值，可以使用.replace（）方法。它有两个参数 - 用于查找匹配项的正则表达式或字符串，以及用于替换匹配项的新字符串。更详细，您可以在http://www.w3schools.com/jsref/jsref_replace.asp阅读。但就我而言，这种方式与使用相同键子串（例如Noun1）的大文本一起使用要好得多。

循环一个字符串并替换特定的值？使用Javascript

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