fix: handle number-type values inside keys array;

- ["foo", "10.0"] => object
- ["foo", 10.0] => array
^ matches lodash
- Closes #12

Author: lukeed

index.d.ts

@@ -1 +1 @@
-export function dset<T extends object, V>(obj: T, keys: string | ArrayLike<string>, value: V): void;
+export function dset<T extends object, V>(obj: T, keys: string | ArrayLike<string | number>, value: V): void;

src/index.js

@@ -4,6 +4,6 @@ export function dset(obj, keys, val) {
 	for (; i < l;) {
 		k = keys[i++];
 		if (k === '__proto__' || k === 'constructor' || k === 'prototype') continue;
-		t = t[k] = (i === l) ? val : (typeof(x=t[k])===typeof(keys)) ? x : (keys[i]*0 !== 0 || !!~keys[i].indexOf('.')) ? {} : [];
+		t = t[k] = (i === l) ? val : (typeof(x=t[k])===typeof(keys)) ? x : (keys[i]*0 !== 0 || !!~(''+keys[i]).indexOf('.')) ? {} : [];
 	}
 }

test/index.js

@@ -71,6 +71,24 @@ keys('should add value to key path :: nested :: array', () => {
 	});
 });
 
+keys('should create Array via integer key :: string', () => {
+	let input = {};
+	dset(input, ['foo', '0'], 123);
+	assert.instance(input.foo, Array);
+	assert.equal(input, {
+		foo: [123]
+	})
+});
+
+keys('should create Array via integer key :: number', () => {
+	let input = {};
+	dset(input, ['foo', 0], 123);
+	assert.instance(input.foo, Array);
+	assert.equal(input, {
+		foo: [123]
+	})
+});
+
 keys.run();
 
 // ---
@@ -117,7 +135,7 @@ arrays('should create arrays with hole(s) if needed', () => {
 	});
 });
 
-arrays('should create object from decimal-like key :: array :: zero', () => {
+arrays('should create object from decimal-like key :: array :: zero :: string', () => {
 	let input = {};
 	dset(input, ['x', '10.0', 'z'], 123);
 	assert.not.instance(input.x, Array);
@@ -130,6 +148,16 @@ arrays('should create object from decimal-like key :: array :: zero', () => {
 	});
 });
 
+arrays('should create array from decimal-like key :: array :: zero :: number', () => {
+	let input = {};
+	dset(input, ['x', 10.0, 'z'], 123);
+	assert.instance(input.x, Array);
+
+	let x = Array(10);
+	x.push({ z: 123 });
+	assert.equal(input, { x });
+});
+
 arrays('should create object from decimal-like key :: array :: nonzero', () => {
 	let input = {};
 	dset(input, ['x', '10.2', 'z'], 123);