标签 javascript
<分区>
所以我有一个字符串(房间描述)并想替换部分 <?player>它带有一些新字符串( req.session.player )。
代码如下:
var description = "<?player>, you are in a room.";
description.replace("<?player>", req.session.player);
我已经测试了 req.session.player确实有字符串值。
当我执行替换方法时，没有任何变化。
注意:我也尝试过使用 /<?player>/这也不起作用。
有什么想法吗？
最佳答案
您必须将您的变量分配给新更改的字符串，因为 replace不更新您的变量:
var description = "<?player>, you are in a room.";
description = description.replace('<?player>', req.session.player);
此外，如果您想替换所有出现的 '<\?player>'而不是只有第一个，然后使用正则表达式 g (全局)标志:
var description = "<?player>, you are in a room.";
description = description.replace(/<\?player>/g, req.session.player);
有关完整信息，请阅读 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace .一些引述:
Returns a new string with some or all matches of a
patternreplaced by areplacement.This method does not change the String object it is called on. It simply returns a new string.
To perform a global search and replace, either include the g switch in the regular expression
关于Javascript 字符串替换不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20305833/