week 2 homework

week-2/1-exercises/B-boolean-literals/exercise.js

@@ -6,6 +6,9 @@
 */
 
 var codeYourFutureIsGreat = true;
+var mozafarIsCool = false;
+var calculationCorrect = true;
+var moreThan10Students = false;
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/C-comparison-operators/exercise.js

@@ -7,14 +7,14 @@
 
 var studentCount = 16;
 var mentorCount = 9;
-var moreStudentsThanMentors; // finish this statement
+var moreStudentsThanMentors = true; // finish this statement
 
 var roomMaxCapacity = 25;
-var enoughSpaceInRoom; // finish this statement
+var enoughSpaceInRoom = false; // finish this statement
 
 var personA = "Daniel";
 var personB = "Irina";
-var sameName; // finish this statement
+var sameName = false; // finish this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/D-predicates/exercise.js

@@ -7,12 +7,12 @@
 
 // Finish the predicate function to test if the passed number is negative (less than zero)
 function isNegative(number) {
-
+        return number < 0;
 }
 
 // Finish the predicate function to test if the passed number is between 0 and 10
 function isBetweenZeroAnd10(number) {
-
+    return number > 0 &&  number < 10;
 }
 
 /* 

week-2/1-exercises/E-conditionals/exercise.js

@@ -8,7 +8,11 @@
 
 var name = "Daniel";
 var danielsRole = "mentor";
-
+if (danielsRole === "mentor") {
+    console.log("Hi, I'm Daniel, I'm a mentor")
+}   else if (danielsRole === "student") {
+    console.log("Hi, I'm Daniel, I'm a student")
+}
 /* 
 EXPECTED RESULT
 ---------------

week-2/1-exercises/F-logical-operators/exercise.js

@@ -11,16 +11,33 @@ var cssLevel = 4;
 
 // Finish the statement to check whether HTML, CSS knowledge are above 5
 // (hint: use the comparison operator from before)
-var htmlLevelAbove5;
-var cssLevelAbove5;
+
+ if (htmlLevel > 5) {
+   var htmlLevelAbove5 = true;
+ } else {false
+  }
+ if (cssLevel > 5) {
+   var cssLevelAbove5 = true;
+ } else {var cssLevelAbove5 = false;}
+
 
 // Finish the next two statement
 // Use the previous variables and logical operators
 // Do not "hardcode" the answers
 var cssAndHtmlAbove5;
 var cssOrHtmlAbove5;
+if (htmlLevel > 5 && cssLevel > 5) {
+    cssAndHtmlAbove5 = true;
+} else {cssAndHtmlAbove5 = false}
+
+if (htmlLevel > 5 || cssLevel > 5) {
+  cssOrHtmlAbove5 = true;
+} else {
+  cssOrHtmlAbove5 = false;
+}
 
 /* 
+
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */
 

week-2/1-exercises/F-logical-operators/exercise2.js

@@ -5,8 +5,23 @@
   Update the code so that you get the expected result.
 */
 
-function isNegative() {}
+function isNegative(number) {
+  return number < 0;
+}
+
+function isBetween5and10 (number)  {
+    return number >= 5 && number <= 10;
+}
 
+function isShortName (name) {
+  let stringLength = name.length;
+  return stringLength < 8;
+
+}
+
+function startsWithD (name) {
+    return name[0] === "D";
+}
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

week-2/1-exercises/G-conditionals-2/exercise-1.js

@@ -7,7 +7,9 @@
 */
 
 function negativeOrPositive(number) {
-
+    if (number < 0) {
+      return "negative";
+    } else {return "positive"}
 }
 
 /* 

week-2/1-exercises/G-conditionals-2/exercise-2.js

@@ -8,7 +8,9 @@
 */
 
 function studentPassed(grade) {
-
+    if (grade < 50) {
+      return "failed";
+    } else {return "passed"}
 }
 
 /* 

week-2/1-exercises/G-conditionals-2/exercise-3.js

@@ -9,8 +9,15 @@
 */
 
 function calculateGrade(mark) {
-
-}
+    if (mark >= 80) {
+      return "A";
+    } else if (mark < 80 && mark > 60) {
+      return "B"
+    } else if (mark < 60 && mark >= 50){
+      return "C"
+    }
+      else {return "F"}
+}     
 
 /* 
 DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/G-conditionals-2/exercise-4.js

@@ -9,6 +9,9 @@
 */
 
 function containsCode(sentence) {
+    if (sentence.includes("code") === true) {
+      return true
+    } else {return false}
 
 }
 

week-2/1-exercises/H-array-literals/exercise.js

@@ -4,8 +4,8 @@
   Declare some variables assigned to arrays of values
 */
 
-var numbers = []; // add numbers from 1 to 10 into this array
-var mentors; // Create an array with the names of the mentors: Daniel, Irina and Rares
+var numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; // add numbers from 1 to 10 into this array
+var mentors = ["Daniel", "Irina", "Rares"]; // Create an array with the names of the mentors: Daniel, Irina and Rares
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/I-array-properties/exercise.js

@@ -6,9 +6,10 @@
 */
 
 function isEmpty(arr) {
-  return; // complete this statement
+  if (arr.length > 0)
+  {return false;} // complete this statement
+ else {return true}
 }
-
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

week-2/1-exercises/J-array-get-set/exercise.js

@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0]; // complete this statement
 }
 
 function last(arr) {
-  return; // complete this statement
+  return arr[arr.length - 1]; // complete this statement
 }
 
 /* 

week-2/1-exercises/J-array-get-set/exercises2.js

@@ -7,7 +7,8 @@
 */
 
 var numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+numbers.push(4);
+numbers[0] = 1;
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

week-2/2-mandatory/1-fix-functions.js

@@ -1,90 +1,110 @@
 // The below functions are syntactically correct but not outputting the right results.
 // Look at the tests and see how you can fix them.
 
-function mood() {
-  let isHappy = true;
-
-  if (isHappy) {
+function mood(isHappy) {
+  if (isHappy === true) {
     return "I am happy";
   } else {
     return "I am not happy";
   }
 }
 
-function greaterThan10() {
-  let num = 10;
-  let isBigEnough;
-
-  if (isBigEnough) {
-    return "num is greater than or equal to 10";
+function greaterThan10(num) {
+  let isBigEnough = 10;
+  if (num > isBigEnough) {
+    return "num is greater than 10";
   } else {
     return "num is not big enough";
   }
 }
 
-function sortArray() {
-  let letters = ["a", "n", "c", "e", "z", "f"];
-  let sortedLetters;
+function sortArray(letters) {
+
+  let sortedLetters = letters.sort();
 
   return sortedLetters;
 }
 
 function first5() {
   let numbers = [1, 2, 3, 4, 5, 6, 7, 8];
-  let sliced;
-
+  numbers.length = 5;
+  let sliced = numbers;
   return sliced;
 }
 
 function get3rdIndex(arr) {
-  let index = 3;
-  let element;
+  let index = arr[3];
+  let element = index;
 
   return element;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
-function test(test_name, expr) {
+const util = require("util");
+function test(test_name, actual, expected) {
   let status;
-  if (expr) {
+  let isEqual;
+  if (Array.isArray(expected)) {
+    isEqual = arraysEqual(actual, expected);
+  } else {
+    isEqual = actual === expected;
+  }
+  if (isEqual) {
     status = "PASSED";
   } else {
-    status = "FAILED";
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
   }
-
   console.log(`${test_name}: ${status}`);
 }
-
 function arraysEqual(a, b) {
   if (a === b) return true;
   if (a == null || b == null) return false;
   if (a.length != b.length) return false;
-
   for (let i = 0; i < a.length; ++i) {
     if (a[i] !== b[i]) return false;
   }
-
   return true;
 }
-
-test("mood function works", mood() === "I am not happy");
+test("mood function works for true", mood(true), "I am happy");
+test("mood function works for false", mood(false), "I am not happy");
 test(
-  "greaterThanTen function works",
-  greaterThan10() === "num is greater than or equal to 10"
+  "greaterThanTen function works for 11",
+  greaterThan10(11),
+  "num is greater than 10"
 );
 test(
-  "sortArray function works",
-  arraysEqual(sortArray(), ["a", "c", "e", "f", "n", "z"])
+  "greaterThanTen function works for 10",
+  greaterThan10(10),
+  "num is not big enough"
 );
-test("first5 function works", arraysEqual(first5(), [1, 2, 3, 4, 5]));
-
+test(
+  "greaterThanTen function works for 9",
+  greaterThan10(9),
+  "num is not big enough"
+);
+test("sortArray function works", sortArray(["a", "n", "c", "e", "z", "f"]), [
+  "a",
+  "c",
+  "e",
+  "f",
+  "n",
+  "z",
+]);
+let numbers = [1, 2, 3, 4, 5, 6, 7, 8];
+test("first5 function works", first5(numbers), [1, 2, 3, 4, 5]);
+if (!arraysEqual(numbers, [1, 2, 3, 4, 5, 6, 7, 8])) {
+  console.log("PROBLEM: first5 changed its input array - it shouldn't!");
+}
 test(
   "get3rdIndex function works - case 1",
-  get3rdIndex(["fruit", "banana", "apple", "strawberry", "raspberry"]) ===
-    "strawberry"
+  get3rdIndex(["fruit", "banana", "apple", "strawberry", "raspberry"]),
+  "strawberry"
 );
 test(
   "get3rdIndex function works - case 2",
-  get3rdIndex([11, 37, 62, 18, 19, 3, 30]) === 18
+  get3rdIndex([11, 37, 62, 18, 19, 3, 30]),
+  18
 );