Programming-Idioms

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2015-09-03, 13:49:52

2015-09-03, 13:50:02

Idiom #15 Pick uniformly a random integer in [a..b]

Pick a random integer greater than or equals to a, inferior or equals to b. Precondition : a < b.

Pick a random integer greater than or equals to a, inferior or equals to b. Precondition : a < b.

function pick(a, b) {
    return a + Math.floor(Math.random() * (b- a+ 1));
}

function pick(a, b) {
    return a + Math.floor(Math.random() * (b - a + 1));
}

You have to build it from a floating-point random number. It is important to use floor , not round .

You have to build it from a floating-point random number. It is important to use floor , not round .

http://stackoverflow.com/a/10134261/871134

http://stackoverflow.com/a/10134261/871134

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