Ruby: Check if string contains substring
How to Convert String to Integer in Ruby
In Ruby, can I check if a string contains a letter without using regular expressions? - YouTube
string contains null byte (ArgumentError)"と出たら、ヌル文字が入ってるので消す - Bye Bye Moore
Ruby String Methods (Ultimate Guide) - RubyGuides
String Operators in Ruby - Coding Ninjas
Working With Strings In Ruby – All the Important Methods You Need to Know - DEV Community
Regular Expression in Ruby | Regular Expression in Ruby with Examples
How to break the string into two lines in ruby syntax - Stack Overflow
How to check if a string contains at least one number using regular expression (regex) in JavaScript? - DEV Community
Vérifier Si Une Chaîne Contient Une Sous-Chaîne En Ruby | Ruby
ruby/string.c at master · ruby/ruby · GitHub
Ruby | Arrays - GeeksforGeeks
How to Use Strings in Ruby | Mix & Go
Blog: Let's know about String and Array Methods in Ruby to Clean and Format Your Data. | Tudip
check if a string contains only letters in Ruby
Ruby Basic exercises: Check a given string contains 'i' characters - w3resource
Java String contains() Example | String contains() Method in Java
JavaScript String Contains: Step-By-Step Guide | Career Karma
YAML.safe_load fails when a string contains a non-existent date · Issue #262 · ruby/psych · GitHub
Ruby String Contains a Substring
