Quotes when using grep?

Question

Grep acts differently depending on what kind of quotes I surround the regex with. I can\'t seem to get a clear understanding of why this is. Here is an example of the problem:

Answer 1

I do not believe it is grep that is behaving differently, it is the shell. I'm assuming you are using bash

http://www.faqs.org/docs/bashman/bashref_8.html

Basically the quoted versions are behaving differently on the slash, depending on the quoting mechanism.

Both of the quoted examples would have worked without the slash. For the first one, the shell would escape the ( and pass in just show( to the grep for the pattern.