ztimson/utils
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Better applyDeltas
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This commit is contained in:
Zakary Timson
2025-08-01 23:43:43 -04:00
parent 5bb5067abc
commit fcae9e107e
2 changed files with 8 additions and 8 deletions
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2
package.json
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@ -1,6 +1,6 @@
{
"name": "@ztimson/utils",
"version": "0.27.2",
"version": "0.27.3",
"description": "Utility library",
"author": "Zak Timson",
"license": "MIT",

14
src/objects.ts
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@ -7,21 +7,21 @@ export type Delta = { [key: string]: any | Delta | null };
* @param deltas List of deltas to apply
* @returns Mutated target
*/
export function applyDeltas(base: any, ...deltas: any): any {
export function applyDeltas(base: any, ...deltas: any[]): any {
function applyDelta(base: any, delta: any): any {
if(delta === null) return null;
if(typeof base !== 'object' || base === null) return delta === undefined ? base : delta;
const result = Array.isArray(base) ? [...base] : { ...base };
for(const key in delta) {
const val = delta[key];
if (val === undefined) delete result[key];
else if (typeof val === 'object' && val !== null && !(Array.isArray(val))) result[key] = applyDelta(result[key], val);
if(val === undefined) delete result[key];
else if(typeof val === 'object' && val !== null && !Array.isArray(val)) result[key] = applyDelta(result[key], val);
else result[key] = val;
}
return result;
}
for(let d of deltas) base = applyDeltas(base, d);
for(const d of deltas.flat()) base = applyDelta(base, d?.delta ?? d);
return base;
}
@ -40,7 +40,7 @@ export function calcDelta(old: any, updated: any): any {
const newVal = updated?.[key];
if(isObj(oldVal) && isObj(newVal)) {
const nested = calcDelta(oldVal, newVal);
if (nested !== null && Object.keys(nested).length > 0) delta[key] = nested;
if(nested !== null && Object.keys(nested).length > 0) delta[key] = nested;
} else if(JSON.stringify(oldVal) !== JSON.stringify(newVal)) {
delta[key] = newVal;
}
@ -325,8 +325,8 @@ export function JSONSerialize<T1>(obj: T1): T1 | string {
export function JSONSanitize(obj: any, space?: number): string {
const cache: any[] = [];
return JSON.stringify(obj, (key, value) => {
if (typeof value === 'object' && value !== null) {
if (cache.includes(value)) return '[Circular]';
if(typeof value === 'object' && value !== null) {
if(cache.includes(value)) return '[Circular]';
cache.push(value);
}
return value;