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28 lines
666 B
JavaScript
28 lines
666 B
JavaScript
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// http://stackoverflow.com/questions/4467539/javascript-modulo-not-behaving
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//
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// A modulo that "behaves" w/ negatives.
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//
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// modulo(5, 5) => 0
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// modulo(4, 5) => 4
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// modulo(3, 5) => 3
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// modulo(2, 5) => 2
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// modulo(1, 5) => 1
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// modulo(0, 5) => 0
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// modulo(-1, 5) => 4
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// modulo(-2, 5) => 3
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// modulo(-3, 5) => 2
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// modulo(-4, 5) => 1
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// modulo(-5, 5) => 0
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//
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export function modulo(i, n) {
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return ((i % n) + n) % n;
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}
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// Does the same that the deprecated d3.round was doing.
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// Possibly imprecise: This https://github.com/d3/d3/issues/210
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export function round(value, decimals = 0) {
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const p = Math.pow(10, decimals);
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return Math.round(value * p) / p;
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}
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