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April 10, 2018 15:10
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Save peanutbother/970e40b56317785ec4089585aaff0047 to your computer and use it in GitHub Desktop.
hash string in format `#HASH~HASH_firstChar.HASH_lastChar`
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| const hash= (str = "") => { | |
| let _hash = (str) => | |
| str.split('').reduce((prevHash, currVal) => | |
| (((prevHash << 5) - prevHash) + currVal.charCodeAt(0))|0, 0); | |
| return `#${str.length > 3?_hash(str.slice(1,-1)):_hash(str)}~${_hash(str.charAt(0))}.${_hash(str.charAt(str.length-1))}` | |
| } | |
| // ~ minified ~ | |
| const hash=(t="")=>{let e=t=>t.split("").reduce((t,e)=>(t<<5)-t+e.charCodeAt(0)|0,0);return`#${t.length>3?e(t.slice(1,-1)):e(t)}~${e(t.charAt(0))}.${e(t.charAt(t.length-1))}`}; |
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_hashfunction from https://stackoverflow.com/a/34842797/3793309