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changed the function

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changed the function
This commit is contained in:
Christian Bender
2017-12-26 19:23:01 +01:00
committed by GitHub
parent 6c4ac0b82c
commit 2914132a6a
1 changed files with 13 additions and 13 deletions
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26
snippets/sdbmHashAlgorithm.md
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@ -1,19 +1,19 @@
### sdbmHashAlgorithm
This algorithm is a simple hash-algorithm that hashes it's input string `s` into a whole number.
This algorithm is a simple hash-algorithm that hashs it input string 's' into a whole number.
The function iterates over each character in string `s` and updates the `hashCode` in each iteration.
``` js
const sdbm = s => {
let hashCode = 0;
for (let i = 0; i < s.length; i++) {
hashCode = s.charCodeAt(i) + (hashCode << 6) + (hashCode << 16) - hashCode;
}
return hashCode;
}
/*
console.log(sdbm("name")) // -3521204949
console.log(sdbm("age")) // 808122783
*/
const sdbm = str => {
let arr = str.split('');
return arr.reduce( (hashCode,currentVal) =>{
return hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16) - hashCode;
}
,0)
}
// examples
console.log(sdbm("name")) // -3521204949
console.log(sdbm("age")) // 808122783
```