Merge pull request #5 from somekindofwallflower/feature/palindrome

Implement two possible solutions to check if a gven string is palindr…

Author: somekindofwallflower

02_palindrome/index.js

@@ -0,0 +1,14 @@
+
+// Solution 1
+// Reverse the string and store the result in an variable than compare string to the reversed value
+// function palindrome(str) {
+//     // const reverseStr = str.split("").reduce((rev, char) =>  char + rev, "");
+//     const reverseStr = str.split("").reverse().join("");
+//     return reverseStr === str;
+// }
+
+// Solution 2
+function palindrome(str) {
+    return str.split('').every((char, i, arr) => char === arr[arr.length - i - 1])
+}
+module.exports = palindrome;

02_palindrome/test.js

@@ -0,0 +1,34 @@
+const palindrome = require('./index');
+
+test("palindrome function is defined", () => {
+    expect(typeof palindrome).toEqual("function");
+})
+
+
+test("'aba' is palindrome", () => {
+    expect(palindrome("aba")).toBeTruthy();
+})
+
+test("' aba' is not palindrome", () => {
+    expect(palindrome(" aba")).toBeFalsy();
+})
+
+test("'aba ' is not palindrome", () => {
+    expect(palindrome("aba ")).toBeFalsy();
+})
+
+test('"greetings" is not a palindrome', () => {
+    expect(palindrome('greetings')).toBeFalsy();
+});
+
+test('"1000000001" a palindrome', () => {
+    expect(palindrome('1000000001')).toBeTruthy();
+});
+
+test('"Fish hsif" is not a palindrome', () => {
+    expect(palindrome('Fish hsif')).toBeFalsy();
+});
+
+test('"pennep" a palindrome', () => {
+    expect(palindrome('pennep')).toBeTruthy();
+});