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Switch algorithm to map most things to +1

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Joke Book 2019-03-11 22:01:11 +00:00
parent 7e23168913
commit 7e2012c805
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1 changed files with 3 additions and 6 deletions
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9
src/util/math-util.js
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@ -92,16 +92,13 @@ class MathUtil {
static inclusiveRandIntWithout(lower, upper, excluded) { static inclusiveRandIntWithout(lower, upper, excluded) {
// Note that subtraction is the number of items in the // Note that subtraction is the number of items in the
// inclusive range [lower, upper] minus 1 already // inclusive range [lower, upper] minus 1 already
// (e.g. in the set {3, 4, 5}, 5 - 3 = 2) // (e.g. in the set {3, 4, 5}, 5 - 3 = 2).
const possibleOptions = upper - lower; const possibleOptions = upper - lower;
const randInt = lower + Math.floor(Math.random() * possibleOptions); const randInt = lower + Math.floor(Math.random() * possibleOptions);
if (randInt === excluded) { if (randInt >= excluded) {
// We've picked the excluded number. return randInt + 1;
return upper;
} else { } else {
// We haven't picked the excluded number, so this
// value maps to itself.
return randInt; return randInt;
} }
} }