What is array.collect in Ruby?
Overview
The array.collect or the collect method is used to call the block argument given to it on each element of an array. The block returns a new array after this operation.
Syntax
array.collect{|item|block}
Parameter
item: Represents an item in the array.
block: Contains instructions on what happens to each element.
Return value
A new array that contains values returned by the block.
Example
In the example below, we’ll create an array of numbers and use collect to add 2 to each element. This increases each element of the array by 2 in the returned value.
# create an arrayarray = [1, 2, 3, 4, 5]# use the collect to# add 2 to each element in# the arraynewArray = array.collect{|item| item + 2}# print the returne value to# the console.puts "#{newArray}"
When we click the “Run” button, elements in the original array are incremented by 2 in the new array. This is a typical use of the collect() method.