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37 lines
1.0 KiB
TypeScript
37 lines
1.0 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/flip.js
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import _curry1 from './internal/_curry1.js';
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import curryN from './curryN.js';
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/**
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* Returns a new function much like the supplied one, except that the first two
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* arguments' order is reversed.
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*
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* @func
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* @memberOf R
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* @since v0.1.0
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* @category Function
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* @sig ((a, b, c, ...) -> z) -> (b -> a -> c -> ... -> z)
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* @param {Function} fn The function to invoke with its first two parameters reversed.
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* @return {*} The result of invoking `fn` with its first two parameters' order reversed.
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* @example
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*
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* const mergeThree = (a, b, c) => [].concat(a, b, c);
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*
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* mergeThree(1, 2, 3); //=> [1, 2, 3]
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*
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* R.flip(mergeThree)(1, 2, 3); //=> [2, 1, 3]
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* @symb R.flip(f)(a, b, c) = f(b, a, c)
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*/
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var flip = _curry1(function flip(fn) {
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return curryN(fn.length, function(a, b) {
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var args = Array.prototype.slice.call(arguments, 0);
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args[0] = b;
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args[1] = a;
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return fn.apply(this, args);
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});
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});
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export default flip;
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