get first value in hash within hash

Question

Hello,

Is there a simple way, instead of looping my entire array to fetch the first value of every inner array.

so in essence I have the following;

array = [['test', 'test2'...], ['test' ....]]

so I want to grab array[#][0] and store the unqiue values.

EDIT

Is there a similar way to use the transpose method for arrays with Hash?

I essentially want to do the same thing Hash = {1=> {1=> 'test', .....}, 2=> {1=> 'test',....}

so at the end I want to have something like new hash variable and leave my existing hash within hash alone.... = {1 => 'test', 2=> 'test2'}

Answer 1

Not sure if I fully understand the question, but if you have a 2 dimensional array (array in array), and you want to turn that into an array of the first element of the second dimension, you can use the map function

firsts = array.map {|array2| array2.first}

The way map works is that it turns one collection into a second collection by applying a function you provide (the block) to each element.

Answer 2

Maybe this?

array.transpose[0]