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I have the following:
array = ["John", "Mike", "Bob", "Mike", "Bob"] i want to get output:
[["Mike", "Mike"], ["Bob", "Bob"], ["John"]] 
732
The group by creates a hash from the capitalize d version of an album name to an array containing all the strings in list that match it (e.g. "Enter sandman" => ["Enter Sandman", "Enter sandman"] ). The map then replaces each array with its length, so you get e.g. ["Enter sandman", 2] for "Enter sandman" .
The shift() is an inbuilt function in Ruby returns the element in the front of the SizedQueue and removes it from the SizedQueue. Parameters: The function does not takes any element.
A Ruby array is heterogeneous in the sense that it can store multiple data types rather than just one type. Actually, it stores object references rather than the objects themselves, except in the case of immediate values such as Fixnum values.
The group_by() of enumerable is an inbuilt method in Ruby returns an hash where the groups are collectively kept as the result of the block after grouping them. In case no block is given, then an enumerator is returned. Parameters: The function takes an optional block according to which grouping is done.
Here is how to do that in Ruby.
array.group_by{ |x| x }.values If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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