如何将变量传递给正则表达式 [英] how to pass a variable to a regex

问题描述

我有一个这样的查找语句

I have a find statement like this

collSession.find({"Venue.type": /.*MT.*/}).toArray(function (err, _clsSession)
        {
            console.log(_clsSession);
        });

给出答案.但是我需要某个变量值，而不是那个杂乱的值MT. 如何实现呢? 谢谢.

It is giving answer.But i need to some value of variable instead of that harcoded value MT. How to achieve this ? Thanks.

更新，我尝试使用"/."+searchterm+"./" 它不起作用.

UPDATE I tried like "/."+searchterm+"./" Its not working.

推荐答案

您也可以使用

Instead of using the inline syntax to create a regular expression, you can also use the RegExp object to create one based on a string

var searchPhrase = "MT";
var regularExpression = new RegExp(".*" + searchPhrase + ".*");
collSession.find({"Venue.type": regularExpression}) [...]

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