Flowdock
method

group_by

Importance_2

Not found

The exact documentation you were looking for could not be found. Here is the best guess.

group_by() public

Returns a hash, which keys are evaluated result from the block, and values are arrays of elements in enum corresponding to the key.

If no block is given, an enumerator is returned instead.

(1..6).group_by {|i| i%3}   #=> {0=>[3, 6], 1=>[1, 4], 2=>[2, 5]}
Show source
Register or log in to add new notes.
February 12, 2016
0 thanks

group on hash

def group_by_hash hash, value
  hash.group_by do |k,v| 
    v > value ? "Big" : "Small"
  end
end

marks = {"Chair" => 30, "Table" => 40, "Bed" => 60, "stool" => 20}
group_by_hash(marks, 30)