[Jprogramming] If, else on each element of an array

[Marcin Żołek]

Hello,
I need to define a function that will execute function f on the elements of an 
input array that meet a certain condition, and execute function g on the other 
elements as in the following code in C. How to do this efficiently in J?

for (i = 0; i < N; i++) {
   if (condition(input[i])) {
       output[i] = f(input[i]);
   } else {
       output[i] = g(input[i]);
   }
}

Martin
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