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December 26, 2016 18:40
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Look and Say JavaScript
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| function lookNsay (n) { | |
| const o = { | |
| last : null, | |
| count : 0, | |
| _res : '', | |
| get res () { | |
| return this._res + this.count + this.last | |
| } | |
| } | |
| return + n.toString().split('').reduce((acc, x) => { | |
| if (acc.last === x) { | |
| acc.count++ | |
| } else { | |
| if (acc.last) { | |
| acc._res = acc.res | |
| } | |
| acc.count = 1; | |
| acc.last = x | |
| } | |
| return acc | |
| }, o).res | |
| } |
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