add sign and trunc
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@ -147,6 +147,21 @@ Ox.round = function(number, decimals) {
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return Math.round(number * pow) / pow;
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};
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/*@
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Ox.sign <f> Returns the sign of a number (-1, 0 or 1)
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> Ox.sign(-Infinity)
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-1
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> Ox.sign(-0)
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0
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> Ox.sign(0)
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0
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> Ox.sign(Infinity)
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1
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@*/
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Ox.sign = function(x) {
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return x !== x || x === 0 ? x : x < 0 ? -1 : 1;
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};
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/*@
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Ox.sinh <f> Hyperbolic sine
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Missing from `Math`.
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@ -164,3 +179,12 @@ Ox.tanh <f> Hyperbolic tangent
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Ox.tanh = function(x) {
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return (Math.exp(x) - Math.exp(-x)) / (Math.exp(x) + Math.exp(-x));
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};
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/*@
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Ox.trunc <f> Truncates a number
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> Ox.trunc(-1.5)
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-1
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@*/
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Ox.trunc = function(x) {
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return ~~x;
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};
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