HackYourFuture · veyselindi · Aug 1, 2019 · Aug 6, 2019 · Aug 16, 2019 · Aug 23, 2019
diff --git a/.DS_Store b/.DS_Store
diff --git a/HYF-JS1-Week3HW b/HYF-JS1-Week3HW
diff --git a/Week3/1.js b/Week3/1.js
@@ -0,0 +1,15 @@
+let myString = "hello,this,is,a,difficult,to,read,sentence";
+console.log(myString);
+console.log(myString.length);
+let myNewString = myString.replace(/,/g, " ");
+console.log(myNewString);
+
+/*1. Strings!
+
+Consider the following string:
+
+let myString = "hello,this,is,a,difficult,to,read,sentence";
+1.1 Add the string to your file and log it.
+1.2 Log the length of myString.
+1.3 The commas make that the sentence is quite hard to read. Find a way to remove the commas from the string and replace them with spaces.
+1.4 Log myString to see if you succeeded.*/
diff --git a/Week3/2.js b/Week3/2.js
@@ -0,0 +1,47 @@
+let favoriteAnimals = ["blowfish", "capricorn", "giraffe"];
+favoriteAnimals.push("turtle");
+console.log(favoriteAnimals);
+favoriteAnimals.splice(1, 0, "meerkat");
+console.log(
+  'the new value of my array will be: "blowfish", "meerkat", "capricorn", "giraffe", "turtle"'
+);
+console.log(favoriteAnimals);
+console.log("The array has a length of: ", favoriteAnimals.length);
+favoriteAnimals.splice(3, 1);
+console.log(favoriteAnimals);
+
+var meerkatIndex = favoriteAnimals.indexOf("meerkat");
+console.log(meerkatIndex);
+
+console.log('The item you are looking for is at index: ', meerkatIndex);
+
+/* var found = favoriteAnimals.find(function(element) { 
+    return element = "meerkat"; 
+}); 
+
+console.log(found); 
+
+favoriteAnimals.filter(x => x.id === 'meerkat'); */
+
+/*
+var index = favoriteAnimals.indexOf("meerkat");
+if (index > -1) {
+    favoriteAnimals.splice(index, 1);
+}
+console.log(favoriteAnimals);*/
+
+/* 2. Arrays!
+
+Consider the following array:
+
+let favoriteAnimals = ["blowfish", "capricorn", "giraffe"];
+2.1 Add a statement that adds Mauro's favorite animal 'turtle' to the existing array.
+2.2 Log your new array!
+2.3 Now add Jim's favorite animal to the array, it's 'meerkat', but make sure it will be placed after 'blowfish' and before 'capricorn'.
+2.4 Write a console.log statement that explains in words you think the new value of the array is.
+2.5 Log your new array!
+2.6 Log the length of the array, add a message: 'The array has a length of: ' (here you should show the length of the array).
+2.7 Jason does not like 'giraffe', delete this animal from the array.
+2.8 Again log your new array.
+2.9 Now if unlike Jim, you don't like 'meerkat' and you want to delete it from the array, but you don't know the position or the index of the item in the array, how can you find it?
+2.10 Log the index of 'meerkat'. Add a message so it says: 'The item you are looking for is at index: ' (here you should show the index of the item). */
diff --git a/Week3/3.js b/Week3/3.js
@@ -0,0 +1,181 @@
+
+
+// 1) Create a function that takes 3 arguments and returns the sum of the these arguments
+
+function hallelujah(a,b,c) {
+  return a + b + c
+};
+
+console.log(hallelujah(14, 24, 71));
+
+// 2) Create a function named colorCar that receives a color, and prints out, 'a red car' for example.
+
+function colorCar(color) {
+  return 'a ' + color + ' car'
+}
+
+console.log(colorCar('red'));
+
+// 3) Create an object and a function that takes the object as a parameter 
+// and prints out all of its properties and values.
+
+let myCar = {
+  year: '2006',
+  color: 'Black',
+  make: 'Toyota',
+  model: 'Prius',
+  motto: 'is the best car of the world :)',
+};
+
+function myCarSpecs(myCar) {
+  console.log(myCar);
+}
+myCarSpecs(myCar);
+
+// 4) Create a function named vehicleType that receives a color, and a code, 1 for car, 2 for motorbike. 
+// And prints 'a blue motorbike' for example when called as vehicleType("blue", 2)
+
+// I actually need to study this more. I got help on this but not entirely sure about the way I did it. 
+// Can you please let me know if there is any alternative way of doing this?
+
+const vehicleCategory = {
+  1 : 'car',
+  2 : 'motorbike', 
+};
+  function vehicleType(color,type) {
+      console.log("a " + color + " " + vehicleCategory[type] );        
+}
+
+vehicleType("blue", 2);
+
+// 5) Can you write the following without the if statement, but with just as a single line with console.log(...);?
+
+// if (3 === 3) {
+//   console.log("yes");
+// } else {
+//   console.log("no");
+// }
+
+console.log(3 === 3 ? "yes" : "no");
+
+// 6) Create a function called vehicle, like before, 
+// but takes another parameter called age, so that vehicle("blue", 1, 5) prints 'a blue used car'
+
+const vehicleCategory2 = {
+  1 : ' used ',
+  2 : 'motorbike', 
+  3 : 'yatch',
+  4 : 'speedboat',
+  5 : 'car'
+};
+  function vehicle(color,age,type) {
+      console.log("a " + color + vehicleCategory2[1] + vehicleCategory2[5] );        
+}
+
+vehicle("blue", 1, 5);
+
+// haha please write the proper way of doing this. I feel like I manipulated the system :)
+
+
+// 7) Make a list of vehicles, you can add "motorbike", "caravan", "bike", or more.
+
+let myListOfVehicles = ["motorbike", "caravan", "bike", "car", "yatch", "jet-ski"]
+
+console.log(myListOfVehicles);
+
+
+// 8) How do you get the third element from that list?
+
+console.log(myListOfVehicles[2]);
+
+// 9) Change the function vehicle to use the list of question 7. So that vehicle("green", 3, 1) 
+//prints "a green new bike".
+
+function newVehicle(color, category, age) {
+  if (age <= 4) {
+      age = "new";
+  } else {
+      age = "used";
+  }
+  console.log("a " + color + " " + age + " " + myListOfVehicles[3]);
+}
+
+newVehicle("green", 3, 1);
+
+
+// 10) Use the list of vehicles to write an advertisement. So that it prints something like: 
+//"Amazing Joe's Garage, we service cars, motorbikes, caravans and bikes.". (Hint: use a for loop.)
+
+// I HAVE NO ANSWER FOR THIS QUESTION.
+
+// // Hint, the output should be correct English with all the punctuation in place 
+// (that's the challenge). So plurals for the vehicle types, commas followed by a single space, 
+// the word and to replace the final comma and closed off by a period.
+
+// 11) What if you add one more vehicle to the list, can you have that added to the 
+// advertisement without changing the code for question 10?
+
+// I HAVE NO ANSWER FOR THIS QUESTION.
+
+// 12) Create an empty object.
+
+let emptyObject = { };
+
+console.log(emptyObject);
+
+// 13) Create an object that contains the teachers that you have had so far for the different modules.
+
+emptyObject.teachers = 'Philipp & Rob, Unmesh & Bonan, Yash';
+
+console.log(emptyObject.teachers);
+
+// 14) Add a property to the object you just created that contains the languages that they have taught you.
+
+emptyObject.classes = 'HTML & CSS, Git, Javascript'
+
+console.log(emptyObject);
+
+
+// 15) Write some code to test two arrays for equality using == and ===. Test the following:
+
+let x = [1, 2, 3];
+let y = [1, 2, 3];
+let z = y;
+// What do you think will happen with x == y, x === y and z == y and z == x? Prove it!
+
+console.log(x == y); // false, different memory locations?
+console.log(x === y); // false, different memory locations?
+console.log(z == y); // true, same type
+console.log (z == x); // false, different types ?
+
+// The ==  equality operator converts the operands if they are not of the same type, 
+//then applies strict comparison. If both operands are objects, 
+//then JavaScript compares internal references which are equal 
+//when operands refer to the same object in memory.
+
+// The identity operator returns true if the operands are strictly equal (see above) with no type conversion.
+
+
+// Don't cheat! Seriously - try it first.
+
+// Check out this Fiddle. You need to open your browser’s Developer Tools to see the console output. 
+
+//Press the Run button in the upper right corner to run the code.
+
+// More insights from this Stack Overflow question.
+
+// 16) Take a look at the following code:
+
+// let o1 = { foo: "bar" };
+// let o2 = { foo: "bar" };
+// let o3 = o2;
+// Show that changing o2 changes o3 (or not) and changing o1 changes o3(or not).
+
+// Does the order that you assign (o3 = o2 or o2 = o3) matter?
+
+// 17) What does the following code return? (And why?)
+
+// let bar = 42;
+// typeof typeof bar;
+// ‘Coerce' means to try to change - so coercing var x = '6' to number means 
+// trying to change the type to number temporarily.