Question

101

Javascript: what's the point of RegExp.compile()?

rated 0 times [ 105] [ 4] / answers: 1 / hits: 29465 / 15 Years ago, tue, may 19, 2009, 12:00:00

I've got a situation where I want to get a regexp from the user and run it against a few thousand input strings. In the manual I found that the RegExp object has a .compile() method which is used to speed things up ins such cases. But why do I have to pass the regexp string to it again if I already passed them in the constructor? Perhaps constructor does the compile() itself?

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

elmer

Add To Favorites

Follow

Total Points: 432

Total Questions: 96

Total Answers: 107

Location: Jordan

Member since Wed, Jun 17, 2020

4 Years ago

elmer questions

1 How to redirect to another page with passing data after submitting form in using react-router-dom v6?

Tue, Jan 25, 22, 00:00, 2 Years ago

1 Typescript: Type 'string' is not assignable to type 'numeric | 2-digit' in Date::toLocaleDateString()

Thu, Mar 11, 21, 00:00, 3 Years ago

1 How to set the value of inputs with ReactJS hooks?

Tue, Apr 21, 20, 00:00, 4 Years ago

1 Is there a way to add border on a table of react component?

Mon, Dec 16, 19, 00:00, 5 Years ago

1 Module not found: Can't resolve 'readline'

Wed, Jun 12, 19, 00:00, 5 Years ago

View All

answered 15 Years ago yulissamirandah · Accepted Answer

The RegExp().compile() method is deprecated. It's basically the same as the constructor, which I assume is why it was deprecated. You should only have to use the constructor nowadays.

In other words, you used to be able to do this:

var regexp = new RegExp(pattern);

regexp.compile(new pattern);

But nowadays it is not any different from simply calling:

var regexp = new RegExp(pattern);

regexp = new RegExp(new pattern);