44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
|
import _curry2 from "./internal/_curry2.js";
|
||
|
|
import _isFunction from "./internal/_isFunction.js";
|
||
|
|
import lift from "./lift.js";
|
||
|
|
import or from "./or.js";
|
||
|
|
/**
|
||
|
|
* A function wrapping calls to the two functions in an `||` operation,
|
||
|
|
* returning the result of the first function if it is truth-y and the result
|
||
|
|
* of the second function otherwise. Note that this is short-circuited,
|
||
|
|
* meaning that the second function will not be invoked if the first returns a
|
||
|
|
* truth-y value.
|
||
|
|
*
|
||
|
|
* In addition to functions, `R.either` also accepts any fantasy-land compatible
|
||
|
|
* applicative functor.
|
||
|
|
*
|
||
|
|
* @func
|
||
|
|
* @memberOf R
|
||
|
|
* @since v0.12.0
|
||
|
|
* @category Logic
|
||
|
|
* @sig (*... -> Boolean) -> (*... -> Boolean) -> (*... -> Boolean)
|
||
|
|
* @param {Function} f a predicate
|
||
|
|
* @param {Function} g another predicate
|
||
|
|
* @return {Function} a function that applies its arguments to `f` and `g` and `||`s their outputs together.
|
||
|
|
* @see R.both, R.anyPass, R.or
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* const gt10 = x => x > 10;
|
||
|
|
* const even = x => x % 2 === 0;
|
||
|
|
* const f = R.either(gt10, even);
|
||
|
|
* f(101); //=> true
|
||
|
|
* f(8); //=> true
|
||
|
|
*
|
||
|
|
* R.either(Maybe.Just(false), Maybe.Just(55)); // => Maybe.Just(55)
|
||
|
|
* R.either([false, false, 'a'], [11]) // => [11, 11, "a"]
|
||
|
|
*/
|
||
|
|
|
||
|
|
var either =
|
||
|
|
/*#__PURE__*/
|
||
|
|
_curry2(function either(f, g) {
|
||
|
|
return _isFunction(f) ? function _either() {
|
||
|
|
return f.apply(this, arguments) || g.apply(this, arguments);
|
||
|
|
} : lift(or)(f, g);
|
||
|
|
});
|
||
|
|
|
||
|
|
export default either;
|