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curry.js
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| function curry( fn, arity ) { | |
| //var arity = fn.length; | |
| return (function resolver() { | |
| let mem = Array.prototype.slice.call( arguments ); | |
| return function() { | |
| let args = mem.slice(); | |
| Array.prototype.push.apply( args, arguments ); | |
| return ( args.length >= arity ? fn : resolver ).apply( null, args ); | |
| }; | |
| }()); | |
| } |
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| let multN = function(...args) { | |
| return args.reduce( (acc, cur) => acc * cur, 1 ) | |
| } | |
| let mult3 = curry(multN, 3) // specify arity as 2nd argument | |
| let mult4 = curry(multN, 4) // specify arity as 2nd argument | |
| console.log( mult3(1,2,3) ) // 6 | |
| console.log( mult3(1,2)(3) ) // 6 | |
| console.log( mult3(1)(2)(3) ) // 6 | |
| console.log( mult4(1)(2)(3)(4) ) // 24 | |
| console.log( mult4(1,2)(3)(4) ) // 24 | |
| console.log( mult4(1,2,3,4) ) // 24 |
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