Question

I want to see if a text already is in a file using regexp.

# file.txt
Hi my name is Foo
and I live in Bar
and I have three children.

I want to see if the text:

Hi my name is Foo
and I live in Bar

is in this file.

How can I match it with a regexp?

Answer 1

Use this regular expression:

/Hi my name is Foo
and I live in Bar/

Example usage:

File.open('file.txt').read() =~ /Hi my name is Foo
and I live in Bar/

For something so simple a string search would also work.

File.open('file.txt').read().index('Hi my name...')