andras/life-towers
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Create immutable storage

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This commit is contained in:
schmelczerandras 2019-08-31 14:24:54 +02:00
parent 72eaca7a3b
commit ca0bf943f7
8 changed files with 229 additions and 8 deletions
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11
src/app/utils/hash.ts
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@ -1,8 +1,13 @@
export const hash = (text: string): number => {
// Return number between 0 and 1.
// Return number from [0, 1)
if (!text) {
return 0;
}
const hash = Array.prototype.reduce.call(text, (hash, char) => (hash << 5) - hash + char.charCodeAt(0), 7);
return hash / (Math.pow(2, 32) - 1);
const hashValue = Array.prototype.reduce.call(
// tslint:disable-next-line:no-bitwise
text,
(value, char) => ((value << 5) - value + (char.charCodeAt(0) as number)) | 0,
7
);
return hashValue / (Math.pow(2, 32) - 2) + 0.5;
};