What are Ruby collections and how do I use them?

What are Ruby collections and how do I use them?

Ruby collections refer to data structures like Arrays, Hashes, Sets, and Ranges that store multiple values. They help manage data efficiently.

Can you explain the difference between an Array and a Hash?

Sure! An Array is an ordered list of items, while a Hash is a collection of key-value pairs. Arrays use numeric indices, and Hashes use unique keys.

How do I iterate over a Hash in Ruby?

You can use the each method to iterate over a Hash. For example: my_hash.each do |key, value| puts "#{key}: #{value}" end.

What are some common methods I can use with Arrays?

Common Array methods include push, pop, map, select, and reject. Each serves different purposes for manipulating array data.