webshrine / stdlib/src / negate
Function: negate()
negate<
T>(fn):T
Creates a function that negates the result of the predicate fn.
- Supports async predicates.
Type Parameters
• T extends (...parameters) => boolean | (...parameters) => Promise<boolean>
Parameters
fn
T
Returns
T
Example
ts
function isEven(n) {
return n % 2 == 0;
}
const isOdd = _.negate(isEven);
_.filter([1, 2, 3, 4, 5, 6], isOdd);
// => [1, 3, 5]