| title | tags | expertise | firstSeen | lastUpdated |
|---|---|---|---|---|
Copy sign to number |
math |
beginner |
2020-10-07 23:52:57 +0300 |
2020-10-07 23:52:57 +0300 |
Returns the absolute value of the first number, but the sign of the second.
- Use
Math.sign()to check if the two numbers have the same sign. - Return
xif they do,-xotherwise.
const copySign = (x, y) => Math.sign(x) === Math.sign(y) ? x : -x;copySign(2, 3); // 2
copySign(2, -3); // -2
copySign(-2, 3); // 2
copySign(-2, -3); // -2