chore: import merge submodule

Author: lukeed

.gitignore

@@ -5,4 +5,5 @@ node_modules
 *.log
 
 /index.d.ts
+/merge
 /dist

package.json

@@ -14,6 +14,10 @@
       "import": "./dist/index.mjs",
       "require": "./dist/index.js"
     },
+    "./merge": {
+      "import": "./merge/index.mjs",
+      "require": "./merge/index.js"
+    },
     "./package.json": "./package.json"
   },
   "author": {
@@ -30,9 +34,11 @@
   },
   "files": [
     "*.d.ts",
+    "merge",
     "dist"
   ],
   "modes": {
+    "merge": "src/merge.js",
     "default": "src/index.js"
   },
   "keywords": [

src/merge.d.ts

@@ -0,0 +1,2 @@
+export function merge(foo: any, bar: any): any; // TODO
+export function dset<T extends object, V>(obj: T, keys: string | ArrayLike<string | number>, value: V): void;

src/merge.js

@@ -0,0 +1,26 @@
+export function merge(a, b) {
+	if (typeof a === 'object' && typeof b === 'object')  {
+		if (Array.isArray(a) && Array.isArray(b)) {
+			for (let i=0; i < b.length; i++) {
+				a[i] = merge(a[i], b[i]);
+			}
+		} else {
+			for (let k in b) {
+				a[k] = merge(a[k], b[k]);
+			}
+		}
+		return a;
+	}
+	return b;
+}
+
+export function dset(obj, keys, val) {
+	keys.split && (keys=keys.split('.'));
+	var i=0, l=keys.length, t=obj, x, k;
+	for (; i < l;) {
+		k = keys[i++];
+		if (k === '__proto__' || k === 'constructor' || k === 'prototype') break;
+		t = t[k] = (i === l) ? merge(t[k],val) : (typeof(x=t[k])===typeof keys) ? x : (keys[i]*0 !== 0 || !!~(''+keys[i]).indexOf('.')) ? {} : [];
+	}
+}
+