Created
October 4, 2016 22:08
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Advanced memoization using references for any number of arguments - codewars
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| function memoize(func) { | |
| let mem = {}; | |
| return (...args) => { | |
| let dest = args.reduce((mem, arg) => { | |
| mem.args = mem.args || []; | |
| mem.mems = mem.mems || []; | |
| let idx = mem.args.indexOf(arg); | |
| let obj; | |
| if (idx === -1) { | |
| obj = {}; | |
| mem.args.push(arg); | |
| mem.mems.push(obj); | |
| } else { | |
| obj = mem.mems[idx]; | |
| } | |
| return obj; | |
| }, mem); | |
| if (!('res' in dest)) { | |
| dest.res = func.apply(this, args); | |
| } | |
| return dest.res; | |
| }; | |
| } |
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