WIP: npm run tester failed

snippet-template.md

@@ -1,14 +1,56 @@
-### functionName
+### dig
 
-Explain briefly what the snippet does.
+Return the value in a nested JSON object by the key.
 
-Explain briefly how the snippet works.
+Given the key name (or target), it will look up the key in the object recursively and return the first value if found.
 
-```js
-const functionName = arguments =>
-  {functionBody}
+```
+const dig = (obj, target) => {
+  if (!obj) return;
+
+  if (obj[target]) return obj[target];
+  else {
+    return( Object.keys(obj).map(key => {
+     if (typeof(obj[key]) === "object") {
+        return dig(obj[key], target);
+      }
+    }).filter(item => item !== undefined)[0] );
+  }
+};
 ```
 
-```js
-functionName('sampleInput'); // 'sampleOutput'
 ```
+const data = {
+  name: "John Doe",
+  details: {
+    phone: "9876543210",
+    email: "john@example.com",
+    address: {
+      street: "123 ABC St.",
+      state: "CA",
+      zip: "98765"
+    },
+    extra1: {
+      nickName: "Johnny"
+    },
+    extra2: {
+      nickName: "JD"
+    },
+    hobby: "coding",
+    snacks: ["chips", 'candy', 'coke']
+  },
+  l1:{
+    l2:{
+      l3:{
+        l4: "4 levels deep."
+      }
+    }
+  }
+};
+
+const hobby = dig(data, 'hobby');    // "coding"
+const name  = dig(data, 'nickName'); // "Johnny"
+const food  = dig(data, 'snacks');   // ["chips","candy","coke"]
+const level4= dig(data, 'l4');       // "4 levels deep."
+const nada  = dig(data, 'blahblah')  // undefined
+```

tag_database

@@ -55,6 +55,7 @@ detectDeviceType:browser
 difference:array,math
 differenceBy:array,function
 differenceWith:array,function
+dig:object,recursion
 digitize:math,array
 distance:math
 drop:array