Accessing array elements in Ruby

Question

I have an array

Numbers =[ 
       [
        [ [1], [2] ],
        [ [3], [4] ],
       ],
       [
        [ [5], [6] ],
        [ [7], [8] ]
       ]
      ]

I want to get the results like this

[ [ [1], [2] ],[ [3], [4] ]]

and

[ [ [5], [6] ],[ [7], [8] ]]

in Ruby.

Is that possible?

Python equivalent is

for Number in Numbers:
   print Number

mu is too short · Accepted Answer · 2019-03-17 02:56:06Z

3

Use each and inspect:

Numbers.each { |n| puts n.inspect }

For example:

>> Numbers.each { |n| puts n.inspect }
[[[1], [2]], [[3], [4]]]
[[[5], [6]], [[7], [8]]]

BTW, technically you have an array of arrays or arrays, there are no multi-dimensional Arrays in Ruby (unless you create your own class to implement them of course).

edited Mar 17, 2019 at 2:56

answered Mar 4, 2012 at 6:54

mu is too short

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4 Comments

Andrew Marshall Over a year ago

Isn't a multidimensional array essentially just an array of arrays anyway?

mu is too short Over a year ago

@AndrewMarshall: No, a multidimensional array is different. The rows of a 2D array all have the same length (as do the columns) but that doesn't necessarily hold in an AoA; an AoA is not a matrix. The distinction is a bit pedantic I admit.

Andrew Marshall Over a year ago

Ah I see what you're saying, that makes sense. Somehow the length didn't occur to me, probably since they're all usually the same length anyway in most situations. Nothing wrong with being pedantic!

megas Over a year ago

BTW, "puts n.inspect" is equivalent to "p n", just saying

megas · Accepted Answer · 2012-03-04 07:09:40Z

1

Equivalent to Python style:

for number in Numbers do
  p number
end
#=>
    [[[1], [2]], [[3], [4]]]
    [[[5], [6]], [[7], [8]]]

answered Mar 4, 2012 at 7:09

megas

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