ruby - Combining Arrays and Summing Integers -

i'm working multiple arrays each 1 string , many integers. have managed set duplicates in nested arrays want combine them. loop on parent array outputs this:

[["word", 1, 1, 3, 4], ["word", 2, 1, 3, 4]]  

and example:

[["without", 1, 1, 3, 4], ["without", 2, 1, 3, 4], ["without", 3, 1, 0, 0]] 

i want function combine these 1 array , sum integers. first example above become:

["word", 3, 2, 6, 8] 

i have tried many different techniques inject , reduce. latest attempt isn't elegant:

# data set of array def inject_array(data)   clicks = 0   imps = 0   cost = 0    converted_clicks = 0   data.each |i|     clicks += i[1]     i[1] = clicks     imps += i[2]     i[2] = imps     cost += i[3]     i[3] = cost     converted_clicks += i[4]     i[4] = converted_clicks   end 

it's getting bit messy, there cleaner way?

assuming arrays same length, can use array#transpose transpose array of arrays row-based column-based arrays:

[["word", 1, 1, 3, 4], ["word", 2, 1, 3, 4]].transpose  => [["word", "word"], [1, 2], [1, 1], [3, 3], [4, 4]] 

from there, it's trivial enough sum numbers in each:

[["word", 1, 1, 3, 4], ["word", 2, 1, 3, 4]].transpose.map.with_index |e, i|   == 0 ? e.first : e.inject(:+) end # => ["word", 3, 2, 6, 8]