Delete from Array and return deleted elements in Ruby

If you don't need to retain the object id of a:

a = [1,2,3,4,5,6,7,8,9,10]b, a = a.partition{|e| e < 4}b # => [1, 2, 3]a # => [4, 5, 6, 7, 8, 9, 10]

If you do need to retain the object id of a, then use a temporal array c:

a = [1,2,3,4,5,6,7,8,9,10]b, c = a.partition{|e| e < 4}a.replace(c)

arrays ruby select

Rails 6 now has this:

a = [1, 2, 3]#=> [1, 2, 3]a.extract! { |n| n.even? }#=> [2]a#=> [1, 3]

arrays ruby select

If you were only deleting one item, this doesn't require duplicating the array, etc:

array = [{ id: 1 }, { id: 2 }, {id: 3 }]array.delete_at(array.find_index { |element| element[:id] == 1 })#=> {:id=>1}

CodeHunter