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How do I do a diff of two strings or arrays in Ruby?
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In Ruby programs, we use string arrays in many places. We can combine and convert string arrays. Ruby supports operators that act upon entire arrays. Create string arrays.
A string is a sequence of one or more characters that may consist of letters, numbers, or symbols. Strings in Ruby are objects, and unlike other languages, strings are mutable, which means they can be changed in place instead of creating new strings.
In Ruby, we can use the double equality sign == to check if two strings are equal or not. If they both have the same length and content, a boolean value True is returned.
A common method for checking substrings in a string is the include? method. If a substring is found, it returns true; otherwise, it returns false. Add the puts function before Ruby code to display results.
For arrays, use the minus operator. For example:
>> foo = [1, 2, 3] => [1, 2, 3] >> goo = [2, 3, 4] => [2, 3, 4] >> foo - goo => [1] Here the last line removes everything from foo that is also in goo, leaving just the element 1. I don't know how to do this for two strings, but until somebody who knows posts about it, you could just convert each string to an array, use the minus operator, and then convert the result back.
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