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Author SHA1 Message Date
fcae9e107e Better applyDeltas
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2025-08-01 23:43:43 -04:00
2 changed files with 8 additions and 8 deletions

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@ -1,6 +1,6 @@
{ {
"name": "@ztimson/utils", "name": "@ztimson/utils",
"version": "0.27.2", "version": "0.27.3",
"description": "Utility library", "description": "Utility library",
"author": "Zak Timson", "author": "Zak Timson",
"license": "MIT", "license": "MIT",

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@ -7,7 +7,7 @@ export type Delta = { [key: string]: any | Delta | null };
* @param deltas List of deltas to apply * @param deltas List of deltas to apply
* @returns Mutated target * @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 { function applyDelta(base: any, delta: any): any {
if(delta === null) return null; if(delta === null) return null;
if(typeof base !== 'object' || base === null) return delta === undefined ? base : delta; if(typeof base !== 'object' || base === null) return delta === undefined ? base : delta;
@ -15,13 +15,13 @@ export function applyDeltas(base: any, ...deltas: any): any {
for(const key in delta) { for(const key in delta) {
const val = delta[key]; const val = delta[key];
if(val === undefined) delete result[key]; if(val === undefined) delete result[key];
else if (typeof val === 'object' && val !== null && !(Array.isArray(val))) result[key] = applyDelta(result[key], val); else if(typeof val === 'object' && val !== null && !Array.isArray(val)) result[key] = applyDelta(result[key], val);
else result[key] = val; else result[key] = val;
} }
return result; 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; return base;
} }