0.1.2 getKeys now supports one level nested array of keys, will flatten

wrote corresponding tests

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@uci-utils/obj-nested-prop",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "Functions to get set, delete, and search nested properties of an object",
   "main": "src/obj-nested-prop.js",
   "type": "module",

src/obj-nested-prop.js

@@ -71,19 +71,42 @@ function getKeys (path, opts = {}) {
     return false
   }
   if (check.isFunction(opts.split)) return opts.split(path, opts)
+
   const sep = opts.separator || opts.delimiter || '.'
-  if (typeof path === 'symbol') {
+  if (check.isSymbol(path)) {
     return [path]
   }
-  // custom get keys
-  if (typeof opts.split === 'function') {
-    return opts.split(path, opts)
-  }
 
   const regx = new RegExp(`(?<!\\\\)[${sep}]`, 'g')
   const regxr = /\\/ig
-  const splitr = i => i.split(regx).map(e => e.replace(regxr, ''))
-  const keys = Array.isArray(path) ? path.filter(Boolean).map(e => typeof e === 'string' && opts.elSplit !== false ? splitr(e) : e).flat() : splitr(path)
+  const splitr = str => {
+    return str.split(regx).map(e => e.replace(regxr, ''))
+  }
+
+  const keys = check.isArray(path)
+    ? path.filter(Boolean)
+      .map(e => {
+        if (check.isArray(e)) {
+          e = e.filter(Boolean)
+          const splits = new Map()
+          let ne = []
+          e.forEach((en, i) => {
+            if (!check.isArray(en) && check.isString(en) && opts.elSplit !== false) {
+              splits.set(i, splitr(en))
+            }
+          })
+          e.forEach((el, j) => {
+            ne = splits.has(j) ? [...ne, ...splits.get(j)] : [...ne, el]
+          })
+          e = ne
+        }
+        if (check.isString(e) && opts.elSplit !== false) e = splitr(e)
+        return e
+      })
+      .flat()
+    : splitr(path)
+
+  if (keys.find(el => check.isArray(el))) return false // can have more than one nested array
 
   for (let i = 0; i < keys.length; i++) {
     if (!check.isString(keys[i])) break

test/obj-nested-prop.test.js

@@ -296,9 +296,11 @@ describe('helpers', () => {
   it('getKeys: will split path as string or array into array of single keys', () => {
     const test = 'atest'
     const key = Symbol('akey')
+    assert.deepStrictEqual(getKeys(['one', ['two', 'three', 'four']]), ['one', 'two', 'three', 'four'])
+    assert(!getKeys(['one', ['two', ['three']]]))
     assert.deepStrictEqual(getKeys('this.is\\.a.string'), ['this', 'is.a', 'string'])
-    assert.deepStrictEqual(getKeys(['this.is.a.string', key, test]),
-      ['this', 'is', 'a', 'string', key, 'atest'])
+    assert.deepStrictEqual(getKeys(['this.is.a.string', ['some\\.nested.keys', key], key, test]),
+      ['this', 'is', 'a', 'string', 'some.nested', 'keys', key, key, 'atest'])
   })
 
   it('pathToString: converts path with getKeys and returns joined string', () => {