substring code snippets in ruby

find the first index of a substring in a string in ruby

find the last index of a substring in a string in ruby

get the first 3 characters and last 5 characters in a string then combine into a new string in ruby

given a string of digits, output all the contiguous substrings of length n in that string in the order that they appear. in ruby

remove a substring from a string in ruby

replace a substring in a string in ruby