How to plus elements in array in Ruby

Question

Like these python below

[m + n for m in 'ABC' for n in 'XYZ']
>>> ['AX', 'AY', 'AZ', 'BX', 'BY', 'BZ', 'CX', 'CY', 'CZ']

How to archive it in ruby in one line?
thanks a lot.

Stefan · Accepted Answer · 2015-07-13 08:33:07Z

2

'ABC'.chars.product('XYZ'.chars).map(&:join)
#=> ["AX", "AY", "AZ", "BX", "BY", "BZ", "CX", "CY", "CZ"]

answered Jul 13, 2015 at 8:33

Stefan

115k14 gold badges157 silver badges234 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

nice one, less block.

shivam · Accepted Answer · 2015-07-13 08:26:40Z

1

In Ruby one way of doing this is:

'ABC'.chars.flat_map { |a| 'XYZ'.chars.map { |b| a + b } }
# => ["AX", "AY", "AZ", "BX", "BY", "BZ", "CX", "CY", "CZ"]

answered Jul 13, 2015 at 8:26

shivam

16.6k3 gold badges62 silver badges72 bronze badges