test-cases-practice

problems/problem1.js

@@ -2,16 +2,17 @@ var assert = require('assert');
 
 // we need 5 test cases. I provided 1 input
 let inputs = [
-  ""
+  "aa", '_as', '1111', 'blue', ""
 ]
 
 let outputs = [
-
+  'a', '_', '1', 'b', undefined
 ]
 
-// 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
+// Make this function return the first character 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 undefined;
+  return str[0];
 }
 
 function runTest(i) {

problems/problem10.js

@@ -2,11 +2,11 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+  "we are one", "the three musquaqueers", 'true gods of what?', 'power user', 'POP POP LOL'
 ]
 
 let outputs = [
-
+  'We Are One', 'The Three Musquaqueers', 'True Gods Of What?', 'Power User', 'Pop Pop Lol'
 ]
 
 /*
@@ -17,7 +17,16 @@ f("ALL YOUR BASE ARE BELONG"); // All Your Base Are Belong
 
 */
 function f(str) {
-
+    var lower = str.toLowerCase();
+    var splitStr = lower.split(" ");
+    var toUpper = [];
+    for (var i= 0; i < splitStr.length; i++) {
+        var firstLetter = splitStr[i][0];                               
+        firstLetter = firstLetter.toUpperCase();                              // ALWAYS ASSIGN THE NEW VALUE TO THE VARIABLE!!!
+        splitStr[i] = firstLetter + splitStr[i].substring(1);
+        toUpper.push(splitStr[i]);
+    }
+    return toUpper.join(" ");
 }
 
 function runTest(i) {

problems/problem11.js

@@ -2,18 +2,31 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+  [2, 3, 4],
+  [10, 5, 15, 20],
+  ['a', 10,'c', 3, 'b'],
+  [undefined, 11, 12 ],
+  []
+
 ]
 
 let outputs = [
-
+  9, 50, 13, 23, 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 sum = 0;
+    for(var i=0; i < arr.length; i++) {
+        if (typeof arr[i] === 'number') {
+            sum += arr[i];
+        } else if (isNaN(i)){ 
+            i+=1;
+        } 
+    }
+    return sum;
 }
 
 function runTest(i) {

problems/problem12.js

@@ -2,10 +2,15 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+    [[0,1,2,3], [1,3,4,5]],
+    [[],[]],
+    [[1],[1]],
+    [['blue']],
+    [[4,4,5,"a"], [1,4,5]]
 ]
 
 let outputs = [
+  [0,2,4,5], [], [], undefined, ["a", 1]
 
 ]
 
@@ -19,9 +24,44 @@ 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 f(arr) {
+//     const arr1 = arr[0];
+//     const arr2 = arr[1];
+//     let arr3 = [];
+//     for(let i = 0;i < arr1.length; i++) {
+//         let 
+//     }
+// }
+[[0,1,2,3], [1,3,4,5]]
+
+function f(arr) {
+    var arr1 = arr[0];
+    var arr2 = arr[1];
+    var ret = [];
+    for (var i = 0; i<arr1.length; i++) {
+        var inArray2 = false;
+        var array1Element = arr1[i];
+        for (var j=0;j < arr2.length; j++) {
+            var array2Element = arr2[j];
+            if (array1Element == array2Element) inArray2 = true;
+        }
+        if(!inArray2) {
+            ret.push(arr1[i]);
+        }
+    }
+    return ret;
+
+// function f(arr) {
+//     const arr1 = arr[0];
+//     const arr2 = arr[1];
+//     let newArr = [];
+//     for (let i = 0; i < arr1.length; i++) {
+//         let check = false;
+
+//     }
+//}
+
 
 function runTest(i) {
     if(i > inputs.length) throw new Error("You do not have enough test cases");
@@ -36,3 +76,41 @@ runTest(2);
 runTest(3);
 runTest(4);
 
+
+
+// function memeber (x,lst) {
+//     for (var i =0; i<lst.length;i++) {
+//         if(x == lst[i]) return true;
+//     }
+//     return false
+// }
+
+// function f(arr) {
+//     var arr1 = arr[0];
+//     var arr2 = arr[1];
+//     var ret = [];
+//     for (var i = 0; i<arr1.length; i++) {
+//         if(!member((arr1[i], arr2) && !member(arr1[i], ret)) {
+//             ret.push(arr1[i]);
+//         }
+//     }
+//     return ret;
+// }
+
+// function f(arr) {
+//     var arr1 = arr[0];
+//     var arr2 = arr[1];
+//     var ret = [];
+//     for (var i = 0; i<arr1.length; i++) {
+//         var inArray2 = false;
+//         var array1Element = arr1[i];
+//         for (var j=0;j < arr2.length; j++) {
+//             var array2Element = arr2[j];
+//             if (array1Element == array2Element) inArray2 = true;
+//         }
+//         if(!inArray2) {
+//             ret.push(arr1[i]);
+//         }
+//     }
+//     return ret;
+}

problems/problem13.js

@@ -2,7 +2,7 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-
+  ''
 ]
 
 let outputs = [

problems/problem2.js

@@ -2,16 +2,17 @@ var assert = require('assert');
 
 // we need 5 test cases.
 let inputs = [
-
+    "aa", '_as', '1111', 'blue', ""
 ]
 
 let outputs = [
-
+    'a', 's', '1', 'e', undefined
 ]
 
 // 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 undefined;
+  return str[str.length-1];
 }
 
 function runTest(i) {

problems/problem3.js

@@ -3,19 +3,35 @@ var assert = require('assert');
 // we need 7 test cases. I've provided 2.
 let inputs = [
   [2, 4],
-  [-3, 3]
+  [-3, 3],
+  [4, 5],
+  [2, 7],
+  [3, -2],
+  [8, 'p'],
+  [5, undefined]
 ]
 
 let outputs = [
   6,
-  0
+  0,
+  9,
+  9,
+  1,
+  undefined,
+  undefined
 ]
 
+
 /*
 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(arr) {
+  var x = arr[0]+arr[1];
+  console.log(x);
+  if (isNaN(x) ) {
+    return undefined;
+  }
+  return x;
 }
 
 function runTest(i) {

problems/problem4.js

@@ -3,12 +3,24 @@ var assert = require('assert');
 // we need 8 test cases. I've provided the first 2
 let inputs = [
   ["hello", 4],
-  ["", 2]
+  ["", 2],
+  ['blue', 1],
+  ['together', 6],
+  ['azul', 2],
+  ['quesrt', 3],
+  ['strtong', 4],
+  ['red', 2]
 ]
 
 let outputs = [
   "o",
-  undefined
+  undefined,
+  'l',
+  'e',
+  'u',
+  's',
+  'o',
+  'd'
 ]
 
 /*
@@ -20,8 +32,8 @@ f("", 4); // undefined
 f("abc", 0); // a
 
 */
-function f(str, index) {
-    
+function f(x, y) {
+  return x[y];
 }
 
 function runTest(i) {

problems/problem5.js

@@ -2,20 +2,33 @@ var assert = require('assert');
 
 // we need 5 test cases. 
 let inputs = [
-  [2, 7]
+  [2, 7],
+  [3, 1],
+  [6, 2],
+  [4, 'p'],
+  [8, 4]
 ]
 
 let outputs = [
-  14
+  14,
+  3,
+  12,
+  undefined,
+  32
 ]
 
 /*
 Make this function return the product 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(arr) {
+  var x = arr[0] * arr[1];
+  if (isNaN(x) ) {
+    return undefined;
+  }
+  return x;
 }
 
+
 function runTest(i) {
     if(i > inputs.length) throw new Error("You do not have enough test cases");
     var expected = outputs[i];

problems/problem6.js

@@ -4,11 +4,20 @@ var assert = require('assert');
 // we need 6 test cases. 
 let inputs = [
   ["add", 10, 20],
-  ["chair", 20, 10]
+  ["chair", 20, 10],
+  ["mult", 5, 10],
+  ['sub', 10, 5],  //write a different number
+  ['blue', 6, 8],
+  [undefined, 9, 0]
 ]
 
 let outputs = [
-  30
+  30,
+  undefined,
+  50,
+  5,
+  undefined,
+  undefined
 ]
 
 /*
@@ -21,8 +30,17 @@ f("mult", 2, 3); // 6
 f("spoof", 10, 10); // undefined
 
 */
-function f(operation, firstArgument, secondArgument) {
-
+function f(arr) {
+    var x;
+    if (arr[0] === 'add') {
+      return x = arr[1]+arr[2];
+    } else if (arr[0] === 'mult') {
+      return x = arr[1]*arr[2];
+    } else if (arr[0] === 'sub') {
+      return x = arr[1]-arr[2];
+    } else {
+      return undefined
+    }
 }
 
 function runTest(i) {