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Fuzion • Idioms • Idiom # 20: Return two values

Idiom # 20: Return two values

See programming-idioms.org:

Code

search(m array2 i32, x i32) =>
  for
    # (i,j) in m.index_pairs   // NYI: destructure syntax sugar still missing
    ij in m.index_pairs
    i := ij.0
    j := ij.1
  until m[i,j] = x
    option (i, j)
  else
    nil

What are effects?

Running Example

ex20 is

  search(m array2 i32, x i32) =>
    for
      # (i,j) in m.index_pairs   // NYI: destructure syntax sugar still missing
      ij in m.index_pairs
      i := ij.0
      j := ij.1
    until m[i,j] = x
      option (i, j)
    else
      nil

  data := array2 10 10 i,j->i*j
  (1..100 : 4) ! x ->
      match search data x
        nil     => say "$x not found"
        t tuple => say "$x found at ({t.0},{t.1})"

What are effects?

last changed: 2024-07-01

next: Idiom # 21: Swap values