使用正则表达式替换字符串中的单词

Question

我有一串看起来像这样的句子

Hey {someone}, How are you? 

或

Hey {someone}, Do you want to go out for lunch?

[问题] 现在，我想将上下文中的{someone}替换为一个人的名字，假设具有该人的名字的变量是var personName。

我该如何实现？

Answer 1

您可以简单地将.replace()用作str.replace('{someone}',name)。如果字符串中有多个{someone}，请使用str.replace(/{someone}/g,name)之类的全局替换：

var str = 'Hey {someone}, How are you?';
var name = 'Jack';
var res = str.replace('{someone}',name);
console.log(res);

str = 'Hey {someone}, Do you want to go out for lunch?';
res = str.replace('{someone}',name);
console.log(res);

Answer 2

使用正则表达式和.replace()，您可以简单地使用：

---

const regex   = /\{someone\}/gm;
const someone = 'Jack';
let str       = 'Hey {someone}, Do you want to go out for lunch?';

str = str.replace(regex, someone);

console.log(str);