LANGUAGE » RUBY

Set

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Basic

Initializing a Set:

myset = Set.new
myset.add(value)

Create a Set from an Array:

myset = myarray.to_set

Method	Description
`to_a`	`Set` → `Array`
`size`	Number of elements.
`empty?`	`true` if there are no elements.
`include?`	Returns `true` if the set includes the specified element.
`map`	Returns a new set with each element updated by the given block.
`collect`	Same as `map`.
`filter`	Returns a new set with only elements evaluated as `true` by the given block.

Check if set includes an element:

ruby

myset.include? 'value'