Homework-Week3

AllouhM · AllouhM · commit 11a428f91a30 · 2018-05-31T03:46:41.000+02:00
diff --git a/Week3/homework/1-step3.js b/Week3/homework/1-step3.js
@@ -2,6 +2,8 @@
 
 function foo(func) {
   // What to do here? 
+  //As the argument is a function so I will call the argument itself.
+  return func();
 }
 
 function bar() {
diff --git a/Week3/homework/2-step3.js b/Week3/homework/2-step3.js
@@ -3,6 +3,31 @@
 function threeFive(startIndex, stopIndex, threeCallback, fiveCallback) {
   const values = [];
   // Add your code here
+  for (let i = startIndex; i <= stopIndex; i++) {
+
+    values.push(i);
+
+    if (i % 3 === 0 && i % 5 === 0) {  // here the order of checking is important.
+      sayThree();
+      sayFive();
+    } else if (i % 3 === 0) {
+      sayThree();
+    } else if (i % 5 === 0) {
+      sayFive();
+    }
+
+  }
+  console.log(values); // just to print out the array when the programme run
+  return values;
+
+}
+
+function sayThree() {
+  console.log("I am Three");
+}
+
+function sayFive() {
+  console.log("I am Five");
 }
 
 threeFive(10, 15, sayThree, sayFive);
diff --git a/Week3/homework/3-step3.js b/Week3/homework/3-step3.js
@@ -1,25 +1,43 @@
 'use strict';
 
 // use a 'for' loop
+
 function repeatStringNumTimesWithFor(str, num) {
-  // add your code here
-  return str;
+  let newStr = '';
+  for (let i = 0; i < num; i++) {
+
+    newStr += str;
+  }
+  return newStr;
 }
 
+
 console.log('for', repeatStringNumTimesWithFor('abc', 3));
 
-// use a 'while' loop
+// // use a 'while' loop
+
 function repeatStringNumTimesWithWhile(str, num) {
-  // add your code here
-  return str;
+  //   // add your code here
+  let newString = "";
+  while (num > 0) {
+    newString += str;
+    num--;
+  }
+  return newString;
 }
 
 console.log('while', repeatStringNumTimesWithWhile('abc', 3));
 
 // use a 'do...while' loop
+
 function repeatStringNumTimesWithDoWhile(str, num) {
-  // add your code here
-  return str;
-}
+  //   // add your code here
+  let string = "";
+  if (num <= 0) return string;
 
-console.log('while', repeatStringNumTimesWithDoWhile('abc', 3));
+  do { string += str; num--; }
+  while (num > 0);
+
+  return string;
+}
+console.log('do..while', repeatStringNumTimesWithDoWhile('abc', 3));
diff --git a/Week3/homework/4-step3.js b/Week3/homework/4-step3.js
@@ -1,2 +1,22 @@
 'use strict';
+
 // paste your freeCodeCamp solutions in here
+
+const Car = function () {
+    this.wheels = 4;
+    this.engines = 1;
+    this.seats = 5;
+};
+
+// Only change code below this line.
+
+const MotorBike = function () {
+    this.wheels = 2;
+    this.engines = 1;
+    this.seats = 1;
+
+};
+
+const forSaleMotorBike = new MotorBike();
+
+console.log(forSaleMotorBike);
diff --git a/Week3/homework/5-step3.js b/Week3/homework/5-step3.js
@@ -1,2 +1,19 @@
 'use strict';
 // paste your freeCodeCamp solutions in here
+function multiplyAll(arr) {
+    let product = 1;
+
+    // Only change code below this line
+
+    for (let i = 0; i < arr.length; i++) {
+        for (let k = 0; k < arr[i].length; k++) {
+            product *= arr[i][k];
+        }
+    }
+    // Only change code above this line
+    return product;
+}
+
+// Modify values below to test your code
+const result = multiplyAll([[1, 2], [3, 4], [5, 6, 7]]);
+console.log(result);
diff --git a/Week3/homework/6-step3.js b/Week3/homework/6-step3.js
@@ -4,3 +4,13 @@ const arr2d = [[1, 2], [3, 4], [5, 6]];
 const arr3d = [[[1, 2], [3, 4]], [[5, 6], [7, 8]]];
 
 // add your solution here, or add a comment on how you would tackle this problem
+// //We use recursive function so it iterates through the array and check every element if
+//it is array so it calls back the same function but with the array element as an argument(as it is also an array)
+// and so on until the number of nested arrays is finished it return the element's value of the last array. 
+
+function printArrayItems(arr) {
+    for (let i = 0; i < arr.length; i++)
+        Array.isArray(arr[i]) ? printArrayItems(arr[i]) : console.log(arr[i]);
+}
+
+printArrayItems(arr3d);
diff --git a/Week3/homework/7-step3.js b/Week3/homework/7-step3.js
@@ -23,3 +23,9 @@ console.log(y);
 
 // Add your explanation as a comment here
 
+ /*This is because const x is a primitive,it is passed by value, that means when we called our function
+and passed x as argument our programme creates a copy of x and used it when the function executed,
+but it doesn't change the original value of x, so x value still the original value which is 9.
+ while const y is an object,it is passed by reference, that means when we called our function and passed y as
+argument.Our programme doesn't make a copy of y value but it takes the original value and used it, 
+so y value is the new value after the function executed which is 10. */
diff --git a/Week3/homework/step4-bonus.js b/Week3/homework/step4-bonus.js
@@ -4,7 +4,18 @@ const values = ['a', 'b', 'c', 'd', 'a', 'e', 'f', 'c'];
 
 // Add your function here. Try and come up with a good name for this function
 
+function unique(arr) {
+
+    const arr2 = [];
+
+    for (let i = 0; i < arr.length; i++) {
+        if (arr2.indexOf(arr[i]) === -1) [
+            arr2.push(arr[i])
+        ]
+    }
+    return arr2;
+}
 // Replace `yourFunction` with the name of the function you just created
-const uniqueValues = yourFunction(values);
+const uniqueValues = unique(values);
 
 console.log(uniqueValues);
diff --git a/Week3/homework/step4.js b/Week3/homework/step4.js
@@ -2,7 +2,17 @@
 
 // Add your code here
 
+function createBase(value) {
+
+    const addNum = function (num) {
+        return value + num;
+    };
+    return addNum;
+}
+
 const addSix = createBase(6);
 
-addSix(10); // returns 16
-addSix(21); // returns 27
+const result1 = addSix(10);
+console.log(result1); // returns 16
+const result2 = addSix(21);
+console.log(result2);// returns 27

Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,8 @@`
`2`	`2`
`3`	`3`	`function foo(func) {`
`4`	`4`	`// What to do here?`
	`5`	`+ //As the argument is a function so I will call the argument itself.`
	`6`	`+ return func();`
`5`	`7`	`}`
`6`	`8`
`7`	`9`	`function bar() {`