Updated find-path.

Author: simdi

find-path/index.js

@@ -0,0 +1,43 @@
+/*
+* @author: Chisimdi Damian Ezeanieto
+* @date: 16/03/2023
+- Should take two params:
+  - object
+  - keys separated by dots as string
+- Return value if it exists at that path inside the object, else return undefined
+*/
+
+// const findPath = (obj, path) => {
+//   if (!path) return undefined;
+  
+//   const keys = path.split('.');
+//   let value = obj;
+//   for (let key of keys) {
+//     if (!value.hasOwnProperty(key)) {
+//       return undefined;
+//     }
+//     value = value[key];
+//   }
+//   return value;
+// };
+
+// const findPath = (obj, path) => {
+//   return path.split('.').reduce((value, key) => value && value[key], obj);
+// };
+
+// Using Recursion
+const findPath = (obj, path) => {
+  const keys = path.split('.');
+  if (keys.length === 1) {
+    return obj[path];
+  } else {
+    const nextKey = keys.shift();
+    const nextObj = obj[nextKey];
+    if (nextObj === undefined) {
+      return undefined;
+    }
+    return findPath(nextObj, keys.join('.'));
+  }
+}
+
+module.exports = findPath;

find-path/test.js

@@ -0,0 +1,42 @@
+/*
+* @author: Chisimdi Damian Ezeanieto
+* @date: 16/03/2023
+*/
+const findPath = require('./index');
+
+const obj = {
+  a: {
+    b: {
+      c: 12,
+      j: false
+    },
+    k: null
+  }
+};
+
+describe('Phone key pad match', () => {
+  test('findPath function is defined', () => {
+    expect(typeof findPath).toEqual('function');
+  });
+  test('Find Path for "a.b.d" === undefined', () => {
+    expect(findPath(obj, 'a.b.d')).toEqual(undefined);
+  });
+  test('Find Path for "a.b.c" === 12', () => {
+    expect(findPath(obj, 'a.b.c')).toEqual(12);
+  });
+  test('Find Path for "a.b.j" === false', () => {
+    expect(findPath(obj, 'a.b.j')).toEqual(false);
+  });
+  test('Find Path for "a.b.j.k" === undefined', () => {
+    expect(findPath(obj, 'a.b.j.k')).toEqual(undefined);
+  });
+  test('Find Path for "a.c" === undefined', () => {
+    expect(findPath(obj, 'a.c')).toEqual(undefined);
+  });
+  test('Find Path for "a.b.c.d.e" === undefined', () => {
+    expect(findPath(obj, 'a.b.c.d.e')).toEqual(undefined);
+  });
+  test('Find Path for "a.k" === null', () => {
+    expect(findPath(obj, 'a.k')).toEqual(null);
+  });
+});