Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | 8x 8x 8x 54944x 11884x 27338x 5062x 10660x 8303x 3484x 3484x 8580x 3484x 4819x 22x 4797x 4797x 4797x 4797x 4797x 21416x 21416x 4797x | import {sort} from '@jsonjoy.com/util/lib/sort/insertion';
import {hash} from './hash';
/**
* Produces a *structural hash* of a JSON value.
*
* This is a hash that is not sensitive to the order of properties in object and
* it preserves spatial information of the JSON nodes.
*
* The hash is guaranteed to contain only printable ASCII characters, excluding
* the newline character.
*
* @param val A JSON value to hash.
*/
export const structHash = (val: unknown): string => {
switch (typeof val) {
case 'string':
return hash(val).toString(36);
case 'number':
case 'bigint':
return val.toString(36);
case 'boolean':
return val ? 'T' : 'F';
case 'object':
if (val === null) return 'N';
if (Array.isArray(val)) {
const length = val.length;
let res = '[';
for (let i = 0; i < length; i++) res += structHash(val[i]) + ',';
return res + ']';
} else if (val instanceof Uint8Array) {
return hash(val).toString(36);
} else {
const keys = Object.keys(val);
sort(keys);
let res = '{';
const length = keys.length;
for (let i = 0; i < length; i++) {
const key = keys[i];
res += hash(key).toString(36) + ':' + structHash((val as Record<string, unknown>)[key]) + ',';
}
return res + '}';
}
default:
return 'U';
}
};
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