added deepExists util

Author: Salakar

lib/utils/index.js

@@ -36,6 +36,30 @@ export function deepGet(object, path, joiner = '/') {
   return tmp;
 }
 
+/**
+ * Deep check if a key exists.
+ * @website https://github.com/Salakar/deeps
+ * @param object
+ * @param path
+ * @param joiner
+ * @returns {*}
+ */
+export function deepExists(object, path, joiner = '/') {
+  const keys = path.split(joiner);
+
+  let i = 0;
+  let tmp = object;
+  const len = keys.length;
+
+  while (i < len) {
+    const key = keys[i += 1];
+    if (!tmp || !hasOwnProperty.call(tmp, key)) return false;
+    tmp = tmp[key];
+  }
+
+  return tmp !== undefined;
+}
+
 /**
  * Simple is object check.
  * @param item