24 lines
727 B
JavaScript
24 lines
727 B
JavaScript
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/**
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* Takes an object and gets the JSON stringified version of it to be converted
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* to a hash code. Taken from https://stackoverflow.com/a/8076436
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* @param obj
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*/
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export const hashCode = (obj) => {
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if (!obj) {
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return 0;
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}
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// Use a replacer function to sort the keys of the object so we get the same hashcode
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// regardless of the order of the keys.
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const jsonString = JSON.stringify(obj, Object.keys(obj).sort());
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let hash = 0;
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for (let i = 0; i < jsonString.length; i++) {
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let code = jsonString.charCodeAt(i);
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hash = (hash << 5) - hash + code;
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hash = hash & hash; // Convert to 32bit integer
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}
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// Make sure the hash is positive since we're using it as an ID
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return Math.abs(hash);
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};
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