Finding strings with equal number of 'A's and 'B's

February 21, 2023

A possible solution in J, assuming that the strings are stored in a file called char_count.txt:

p =: 'char_count.txt'
characters =: 'b' freads p
ca =: [: +/ 'A' = ]
cb =: [: +/ 'B' = ]
ceq =: ca = cb
result =: ceq L:0 characters
Go back to the problem.

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