strpos() in Ruby?

In PHP there's a useful strpos function that finds the position of first occurrence of a string. Is there a similar way to do this in Ruby?

What is the strpos () function used for?

The strpos() function finds the position of the first occurrence of a string inside another string.

What does Strpos return?

strpos in PHP is a built-in function. Its use is to find the first occurrence of a substring in a string or a string inside another string. The function returns an integer value which is the index of the first occurrence of the string.

str.index(pattern)

Use the index() method. This will return the index if found, otherwise return nil.

Usage:

ruby-1.9.2-p136 :036 > str = "Ruby is awesome"
 => "Ruby is awesome" 
ruby-1.9.2-p136 :037 > str.index("is awesome")
 => 5 
ruby-1.9.2-p136 :038 > str.index("testtest")
 => nil