Fuzion • Idioms • Idiom # 70: Use clock as random generator seed

Idiom # 70: Use clock as random generator seed

Random numbers generators in Fuzion are effects. To use a random number generator seeded by a clock, we can use the standard library feature time_seeded_random which installs a time seeded random number generator into the current environment for running the code provided with the function parameter f.

Code

time_seeded_random f

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time_seeded_random f
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

Running Example

The following example calls show_random in the context of an explicitly time seeded random provider:

ex70 is

  show_random (msg String) =>
    for i in 0..5 do
      say "$msg random is {random.next_u32 100}"

  time_seeded_random (()->
    show_random "seeded with time")

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ex70 is
  show_random (msg String) =>
    for i in 0..5 do
      say "$msg random is {random.next_u32 100}"
  time_seeded_random (()->
    show_random "seeded with time")
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

last changed: 2025-05-13

next: Idiom # 71: Echo program implementation