Fuzion • Idioms • Idiom # 148: Read list of integer numbers from stdin

Idiom # 148: Read list of integer numbers from stdin

Code

# aborts when the first string that can't be
# parsed as i32 is encountered
(io.stdin.reader lm) ! ()->
  for
    l := (io.buffered lm).read_line ? str String => str.parse_i32.as_option | io.end_of_file => nil
  while l.exists

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# aborts when the first string that can't be
# parsed as i32 is encountered
(io.stdin.reader lm) ! ()->
  for
    l := (io.buffered lm).read_line ? str String => str.parse_i32.as_option | io.end_of_file => nil
  while l.exists
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

Running Example

# usage: $ echo -e "1\n2\n3\n" | fz src/idiom148ex.fz
ex =>

  # aborts when the first string that can't be
  # parsed as i32 is encountered
  lm : mutate is
  lm ! ()->
    (io.stdin.reader lm) ! ()->
      for
        l := (io.buffered lm).read_line ? str String => str.parse_i32.as_option | io.end_of_file => nil
      while l.exists
        say l

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# usage: $ echo -e "1\n2\n3\n" | fz src/idiom148ex.fz
ex =>
  # aborts when the first string that can't be
  # parsed as i32 is encountered
  lm : mutate is
  lm ! ()->
    (io.stdin.reader lm) ! ()->
      for
        l := (io.buffered lm).read_line ? str String => str.parse_i32.as_option | io.end_of_file => nil
      while l.exists
        say l
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

last changed: 2025-05-13

next: NYI: Idiom # 149: Rescue the princess