CODEWITHSUNDEEP
julia
dukereg
dukereg

Reputation: 722

Iterate through all possibilities in Julia

If I want to do something on each pair of letters, it could look like this in Julia:

for l1 in 'a':'z'
    for l2 in 'a':'z'
        w = l1*l2
        # ... do something with w ...
    end
end

I want to generalise this to words of any length, given a value n specifying the number of letters desired. How do I best do this in Julia?

Upvotes: 2

Views: 68

Answers (1)

Bogumił Kamiński
Bogumił Kamiński

Reputation: 69949

You can use:

for ls in Iterators.product(fill('a':'z', n)...))
    w = join(ls)
    # ... do something with w ...
end

In particular if you wanted to collect them in an array you could write:

join.(Iterators.product(fill('a':'z', n)...))

or flatten it to a vector

vec(join.(Iterators.product(fill('a':'z', n)...)))

Note, however, that in most cases this will not be needed and for larger n it is better not to materialize the output but just iterate over it as suggested above.

Upvotes: 5

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