What does the regular expression /_/g mean?

Question

JavaScript:

.replace(/_/g,\" \");

I have it in my code but can\'t remember why or what it does! Can one of you regular expression gurus hel

Answer 1

Like everyone else has said, it replaces all underscores with spaces. So "Hello_there." would become "Hello there."

But along with the answer, I want to suggest something to you. Use comments.

In your code say something like:

// Replaces all underscores so that blah blah blah blah blah..
var hello = "Hello_there."
    .replace(/_/g, ' ');