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Idiom # 14: Pick uniformly a random floating point number in [a..b)

See programming-idioms.org:

pick(a, b f64) => a + random.next_f64 * (b-a)
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Running Example

pick(a, b f64) => a + random.next_f64 * (b-a)
for i in 1..10
a := i.as_f64 * 3
b := i.as_f64 * 4
x := pick a b
do
say "$x {if a <= x < b then "ok" else "not ok!"}"
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last changed: 2025-05-13