Test-cases-practice from 1 to 14 resolved

problems/problem1.js

@@ -2,16 +2,26 @@ var assert = require('assert');
 
 // we need 5 test cases. I provided 1 input
 let inputs = [
-  ""
+  "",
+  "abc",
+  "12345",
+  "hello",
+  "This is a string"
 ]
 
 let outputs = [
-
+  undefined,
+  "a",
+  "1",
+  "h",
+  "T"
 ]
 
 // Make this function return the first letter of the string that is passed to it. If the string does not have a first letter, return undefined
 function f(str) {
-
+  if (str.length > 0){
+    return str.charAt(0);
+  };
 }
 
 function runTest(i) {

problems/problem10.js

@@ -2,11 +2,19 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+    "hey listen",
+    "ALL YOUR BASE ARE BELONG TO US",
+    "the cake is a lie",
+    "sTAY a wHILE aND lISTEN",
+    "FOR THE EMPEROR"
 ]
 
 let outputs = [
-
+  "Hey Listen",
+  "All Your Base Are Belong To Us",
+  "The Cake Is A Lie",
+  "Stay A While And Listen",
+  "For The Emperor"
 ]
 
 /*
@@ -17,7 +25,16 @@ f("ALL YOUR BASE ARE BELONG"); // All Your Base Are Belong
 
 */
 function f(str) {
-
+    var words = str.split(" ");
+    var answer = [];
+
+    for (var i = 0; i < words.length; i++) {
+        var capitalizedWord = words[i].charAt(0).toUpperCase() + words[i].slice(1).toLowerCase();
+        answer.push(capitalizedWord);
+    }
+
+    return answer.join(" ");
+
 }
 
 function runTest(i) {

problems/problem11.js

@@ -2,18 +2,33 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+  [1, 2, 3, 4, 5],
+  [40, 2],
+  ["a", 13],
+  ["x", "y"],
+  []
 ]
 
 let outputs = [
-
+  15,
+  42,
+  13,
+  0,
+  0
 ]
 
 /*
 Make this function return the sum of all the numbers in the input array. If any element in the array is not a number, skip it. If the array is empty, return zero.
 */
 function f(arr) {
-
+    var answer = 0;
+    for (var i = 0; i < arr.length; i++) {
+        if (typeof arr[i] == 'number') {
+            answer = answer + arr[i];
+        }
+    }  
+
+    return answer;
 }
 
 function runTest(i) {

problems/problem12.js

@@ -2,11 +2,19 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+    [[0,1,2,3], [1,3,4,5]],
+    [[1,2,3], [1,2,3]],
+    [[1,2,42], [1,2,13]],
+    [[1], [1]],
+    ["a"]
 ]
 
 let outputs = [
-
+    [0,2,4,5],
+    [],
+    [42,13],
+    [],
+    undefined
 ]
 
 /*
@@ -19,8 +27,40 @@ uniqueElements([0,1,2,3], [1,3,4,5]); // [0,4,5]
 uniqueElements([1,2,3], [1,2,3]); // []
 uniqueElements(2,3); // undefined, not arrays
 */
-function f(arr1, arr2) {
+
+function isPartOfArray(x, list){
+    for (var i = 0; i < list.length; i++) {
+        if (x == list[i]) {
+            return true;
+        }
+    }
+    return false;
+}
+
+function f(arr) {
+    var firstArray = arr[0];
+    var secondArray = arr[1];
+    var answer = [];
+
+    if (Array.isArray(arr) && Array.isArray(firstArray) && Array.isArray(secondArray)) {
+        for (var i = 0; i < firstArray.length; i++) {
+            if (!isPartOfArray(firstArray[i], secondArray) 
+            && !isPartOfArray(firstArray[i], answer)) {
+                answer.push(firstArray[i]);
+            }
+        }
+
+        for (var i = 0; i < secondArray.length; i++) {
+            if (!isPartOfArray(secondArray[i], firstArray) 
+            && !isPartOfArray(secondArray[i], answer)) {
+                answer.push(secondArray[i]);
+            }
+        }
+
+        return answer;
+    }
 
+
 }
 
 function runTest(i) {

problems/problem13.js

@@ -2,11 +2,19 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+    "kayak",
+    "radar",
+    "notakayak",
+    "hello",
+    "worldlrow"
 ]
 
 let outputs = [
-
+    true,
+    true,
+    false,
+    false,
+    true
 ]
 
 /*
@@ -16,7 +24,16 @@ RADAR -> Yes
 JAVASCRIPT -> No
 */
 function f(str) {
-
+    var arr = str.split("");
+    var rev = arr.reverse("");
+    var ans = rev.join("");
+
+    if (str == ans) {
+        return true;
+    }
+    else {
+        return false
+    }
 }
 
 function runTest(i) {

problems/problem14.js

@@ -2,11 +2,28 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+  "Lorem ipsumos dolor sit amet consectetur adipisicing elit. Magni quisquam",
+  "Handshake backing conversion android traction angel investor analytics low hanging fruit ecosystem",
+  "a b c d e f g h i j k l m n o p q r s t u v w x y z",
+  "0123456789012345678901234567890123456789",
+  "This string is too short."
 ]
 
+/*To make sure I had the right position of \n in the expected output*/
+/*var z = "Handshake backing conversion android traction angel investor analytics low hanging fruit ecosystem";
+console.log("39eme = " + z.charAt(38));
+console.log("40eme = " + z.charAt(39));
+console.log("41eme = " + z.charAt(40));
+console.log("79eme = " + z.charAt(78));
+console.log("80eme = " + z.charAt(79));
+console.log("81eme = " + z.charAt(80)); */
+
 let outputs = [
-
+  "Lorem ipsumos dolor sit amet consectetur\nadipisicing elit. Magni quisquam",
+  "Handshake backing conversion android tra\nction angel investor analytics low hangi\nng fruit ecosystem",
+  "a b c d e f g h i j k l m n o p q r s t \nu v w x y z",
+  "0123456789012345678901234567890123456789",
+  "This string is too short."
 ]
 
 /*
@@ -31,7 +48,19 @@ Lorem ipsumos dolor sit amet consectetur
  even though there is a space before the a in adipisicing
 */
 function f(str) {
-
+    var myString = str;
+    ans = [];
+    while (myString.length > 40) {
+        ans.push(myString.slice(0,40) + "\n");
+        myString = myString.slice(40);
+
+        if (myString.charAt(0) == " ") {
+            myString = myString.slice(1);
+        }
+    }
+
+    ans.push(myString);
+    return ans.join("");
 }
 
 function runTest(i) {

problems/problem2.js

@@ -2,16 +2,26 @@ var assert = require('assert');
 
 // we need 5 test cases.
 let inputs = [
-
+  "",
+  "abc",
+  "12345",
+  "hello",
+  "This is a string"
 ]
-
-let outputs = [
 
+let outputs = [
+  undefined,
+  "c",
+  "5",
+  "o",
+  "g"
 ]
 
 // Make this function return the last letter of the string that is passed to it. If the string does not have a last letter, return undefined
 function f(str) {
-
+    if (str.length > 0) {
+        return str.charAt(str.length - 1);
+    }
 }
 
 function runTest(i) {

problems/problem3.js

@@ -3,19 +3,32 @@ var assert = require('assert');
 // we need 7 test cases. I've provided 2.
 let inputs = [
   [2, 4],
-  [-3, 3]
+  [-3, 3],
+  ["a", 8],
+  ["x", "z"],
+  [21, 21],
+  [3, 39],
+  [8, 5]
 ]
 
 let outputs = [
   6,
-  0
+  0,
+  undefined,
+  undefined,
+  42,
+  42,
+  13
 ]
 
 /*
 Make this function return the sum of the two numbers that are passed to it. If one of the numbers is not passed, or if anything other than numbers are passed, return undefined.
 */
-function f(x, y) {
-
+function f(x) {
+  console.log(x)
+  if (!isNaN(x[0]) & !isNaN(x[1])) {
+    return x[0] + x[1];
+  }
 }
 
 function runTest(i) {

problems/problem4.js

@@ -3,25 +3,37 @@ var assert = require('assert');
 // we need 8 test cases. I've provided the first 2
 let inputs = [
   ["hello", 4],
-  ["", 2]
+  ["", 2],
+  ["Hi", 0],
+  ["Lorem Ipsum", 3],
+  ["1orem", 0],
+  ["Lorem lipsum", 6],
+  ["20346127", 1],
+  ["World", 0]
 ]
 
 let outputs = [
   "o",
-  undefined
+  undefined,
+  "H",
+  "e",
+  "1",
+  "l",
+  "0",
+  "W"
 ]
 
 /*
 Make this function return the letter at the specified position in the string. If no such letter exists, it should return undefined.
-
 For example:
-f("hello", 1); // e
-f("", 4); // undefined
-f("abc", 0); // a
-
+f(["hello", 1]); // e
+f(["", 4]); // undefined
+f(["abc", 0]); // a
 */
 function f(str, index) {
-
+  if (str.length > 0 && str.length > index ){
+    return str.charAt(index);
+  };
 }
 
 function runTest(i) {
@@ -38,4 +50,4 @@ runTest(3);
 runTest(4);
 runTest(5);
 runTest(6);
-runTest(7);
+runTest(7);