Hi All, I wish to create array @

Johan De Graeve · Mar 16, 2018

Hi All,

I wish to create array @c from arrays @a and @b

@a = (1, 2, 3)
@b = ("a", "b");

In @c I want all values of @a with all possible combinations of @b

@c = (
[ [1,"a"], [2,"a"], [3,"a"] ]
, [ [1,"a"], [2,"a"], [3,"b"] ]
, [ [1,"a"], [2,"b"], [3,"a"] ]
, [ [1,"b"], [2,"a"], [3,"a"] ]
, [ [1,"b"], [2,"b"], [3,"a"] ]
, [ [1,"b"], [2,"b"], [3,"b"] ]
)

What would we be the best way to accomplish this?

Thanks for helping out.

Johan

SamBones · Mar 16, 2018

What have you tried so far?

mikrom · Mar 18, 2018

Johan De Graeve said:
I want all values of @a with all possible combinations of @b

What you want seems to be variations with repetition or so called n-tuples from a set of m-elements

https://en.wikipedia.org/wiki/Tuple#n-tuples_of_m-sets

In your case m = 2 and n = 3, so the number of all variations with repetition would be 2[sup]3[/sup] = 8, like this:

Code:

[
[[1, "a"], [2, "a"], [3, "a"]],
[[1, "a"], [2, "a"], [3, "b"]],
[[1, "a"], [2, "b"], [3, "a"]],
[[1, "a"], [2, "b"], [3, "b"]],
[[1, "b"], [2, "a"], [3, "a"]],
[[1, "b"], [2, "a"], [3, "b"]],
[[1, "b"], [2, "b"], [3, "a"]],
[[1, "b"], [2, "b"], [3, "b"]]
]

To generate these data I adapted the program from here

https://stackoverflow.com/questions/2366074/code-for-variations-with-repetition-combinatorics

You can use it as template to write your own perl version.

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Hi All, I wish to create array @

Johan De Graeve

Systems Engineer

SamBones

Programmer

mikrom

Programmer

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