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#241 Match Math.max and Math.min negative zero handling

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This commit is contained in:
Michael Mclaughlin 2025-01-23 14:13:09 +00:00
parent 08e5a381d2
commit cb60444aaf
2 changed files with 22 additions and 12 deletions
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23
decimal.js
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@ -1222,7 +1222,7 @@
*
P.max = function () {
Array.prototype.push.call(arguments, this);
return maxOrMin(this.constructor, arguments, 'lt');
return maxOrMin(this.constructor, arguments, -1);
};
*/
@ -1234,7 +1234,7 @@
*
P.min = function () {
Array.prototype.push.call(arguments, this);
return maxOrMin(this.constructor, arguments, 'gt');
return maxOrMin(this.constructor, arguments, 1);
};
*/
@ -3245,19 +3245,25 @@
/*
* Handle `max` and `min`. `ltgt` is 'lt' or 'gt'.
* Handle `max` (`n` is -1) and `min` (`n` is 1).
*/
function maxOrMin(Ctor, args, ltgt) {
var y,
function maxOrMin(Ctor, args, n) {
var k, y,
x = new Ctor(args[0]),
i = 0;
for (; ++i < args.length;) {
y = new Ctor(args[i]);
// NaN?
if (!y.s) {
x = y;
break;
} else if (x[ltgt](y)) {
}
k = x.cmp(y);
if (k === n || k === 0 && x.s === n) {
x = y;
}
}
@ -4292,7 +4298,6 @@
// which points to Object.
x.constructor = Decimal;
// Duplicate.
if (isDecimalInstance(v)) {
x.s = v.s;
@ -4593,7 +4598,7 @@
*
*/
function max() {
return maxOrMin(this, arguments, 'lt');
return maxOrMin(this, arguments, -1);
}
@ -4604,7 +4609,7 @@
*
*/
function min() {
return maxOrMin(this, arguments, 'gt');
return maxOrMin(this, arguments, 1);
}

11
test/modules/minAndMax.js
View File

@ -28,18 +28,23 @@ T('min and max', function () {
t(NaN, NaN, [Infinity, -2, NaN, 0, -1, -Infinity]);
t(0, 0, [0, 0, 0]);
t(-2, Infinity, [-2, 0, -1, Infinity]);
t(-0, 0, [-0, 0, 0]);
t(-0, 0, [0, -0, 0]);
t(-0, 0, [0, 0, -0]);
t(-0, 1, [1, 0, -0]);
t(-2, 0, [0, -1, -0, -2]);
t(-2, Infinity, [-2, -1, -0, 0, Infinity]);
t(-Infinity, 0, [-2, 0, -1, -Infinity]);
t(-Infinity, Infinity, [-Infinity, -2, 0, -1, Infinity]);
t(-Infinity, Infinity, [Infinity, -2, 0, -1, -Infinity]);
t(-Infinity, Infinity, [-Infinity, -2, 0, new Decimal(Infinity)]);
t(-2, 0, [-2, 0, -1]);
t(-2, 0, [-2, -1, 0]);
t(-2, 0, [-2, -1, -0, 0]);
t(-2, 0, [0, -2, -1]);
t(-2, 0, [0, -1, -2]);
t(-2, 0, [-1, -2, 0]);
t(-2, 0, [-1, 0, -2]);
t(-2, 0, [-1, 0, -0, -2]);
t(-1, 1, [-1, 0, 1]);
t(-1, 1, [-1, 1, 0]);