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48 lines
1.5 KiB
TypeScript
48 lines
1.5 KiB
TypeScript
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// Loaded from https://deno.land/x/ramda@v0.27.2/source/ap.js
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import _concat from './internal/_concat.js';
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import _curry2 from './internal/_curry2.js';
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import _reduce from './internal/_reduce.js';
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import map from './map.js';
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/**
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* ap applies a list of functions to a list of values.
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*
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* Dispatches to the `ap` method of the second argument, if present. Also
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* treats curried functions as applicatives.
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*
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* @func
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* @memberOf R
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* @since v0.3.0
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* @category Function
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* @sig [a -> b] -> [a] -> [b]
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* @sig Apply f => f (a -> b) -> f a -> f b
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* @sig (r -> a -> b) -> (r -> a) -> (r -> b)
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* @param {*} applyF
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* @param {*} applyX
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* @return {*}
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* @example
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*
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* R.ap([R.multiply(2), R.add(3)], [1,2,3]); //=> [2, 4, 6, 4, 5, 6]
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* R.ap([R.concat('tasty '), R.toUpper], ['pizza', 'salad']); //=> ["tasty pizza", "tasty salad", "PIZZA", "SALAD"]
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*
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* // R.ap can also be used as S combinator
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* // when only two functions are passed
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* R.ap(R.concat, R.toUpper)('Ramda') //=> 'RamdaRAMDA'
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* @symb R.ap([f, g], [a, b]) = [f(a), f(b), g(a), g(b)]
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*/
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var ap = _curry2(function ap(applyF, applyX) {
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return (
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typeof applyX['fantasy-land/ap'] === 'function'
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? applyX['fantasy-land/ap'](applyF)
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: typeof applyF.ap === 'function'
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? applyF.ap(applyX)
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: typeof applyF === 'function'
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? function(x) { return applyF(x)(applyX(x)); }
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: _reduce(function(acc, f) { return _concat(acc, map(f, applyX)); }, [], applyF)
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);
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});
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export default ap;
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