Javascript Math Object Methods-negativos a cero
En Javascript parece que no puedo encontrar un método para establecer negativos a cero?
-90 se convierte en 0
-45 se convierte en 0
0 se convierte en 0
90 se convierte en 90
¿Hay algo así? Acabo de redondear los números.
51
7 answers
Simplemente haz algo como
value = value < 0 ? 0 : value;
O
if (value < 0) value = 0;
O
value = Math.max(0, value);
110
Author: aioobe,
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2011-02-07 18:16:17
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2011-02-07 18:16:17
Supongo que podrías usar Math.max()
.
var num = 90;
num = Math.max(0,num); // 90
var num = -90;
num = Math.max(0,num); // 0
36
Author: RightSaidFred,
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2011-02-07 18:16:48
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2011-02-07 18:16:48
Si quieres ser inteligente:
num = (num + Math.abs(num)) / 2;
Sin Embargo, Math.max
o un operador condicional sería mucho más comprensible.
Además, esto tiene problemas de precisión para grandes números.
6
Author: SLaks,
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2011-02-07 18:18:05
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2011-02-07 18:18:05
Math.positive = function(num) {
return Math.max(0, num);
}
// or
Math.positive = function(num) {
return num < 0 ? 0 : num;
}
3
Author: Juan Mendes,
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2011-02-07 21:14:34
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2011-02-07 21:14:34
x < 0 ? 0 : x
hace el trabajo .
2
Author: Alexandre C.,
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2011-02-07 18:16:51
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2011-02-07 18:16:51
No creo que tal función exista con el objeto Math nativo. Debe escribir un script para completar la función si necesita usarla.
0
Author: jacobangel,
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2011-02-07 18:18:49
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2011-02-07 18:18:49
Recuerde el cero negativo.
function isNegativeFails(n) {
return n < 0;
}
function isNegative(n) {
return ((n = +n) || 1 / n) < 0;
}
isNegativeFails(-0); // false
isNegative(-0); // true
Math.max(-0, 0); // 0
Math.min(-0, 0); // -0
Fuente: http://cwestblog.com/2014/02/25/javascript-testing-for-negative-zero/
0
Author: Killy,
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2018-01-12 08:48:00
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2018-01-12 08:48:00