What is the meaning of the 'g' flag in regular expressions?

Question

What is the meaning of the g flag in regular expressions?

What is is the difference between /.+/g and /.+/?

Answer 1

Will give example based on string. If we want to remove all occurences from a string. Lets say if we want to remove all occurences of "o" with "" from "hello world"

"hello world".replace(/o/g,'');