Ruby: How to count the number of times a string appears in another string?

Question

I\'m trying to count the number of times a string appears in another string.

I know you can count the number of times a letter appears in a string:

strin         


        

Answer 1

It's because the count counts characters, not instances of strings. In this case 'aa' means the same thing as 'a', it's considered a set of characters to count.

To count the number of times aa appears in the string:

string = "aabbccddbb"
string.scan(/aa/).length
# => 1
string.scan(/bb/).length
# => 2
string.scan(/ff/).length
# => 0