JAN-25 | MIKIYAS GEBREMICHAEL | DATA FLOWS | Destructuring | SPRINT-1 | WEEK - 1

Sprint-1/destructuring/exercise-1/exercise.js

@@ -3,10 +3,12 @@ const personOne = {
   age: 34,
   favouriteFood: "Spinach",
 };
+let {name, age, favouriteFood} = personOne;
+console.log(`${name} and ${age}`);
 
 // Update the parameter to this function to make it work.
 // Don't change anything else.
-function introduceYourself(___________________________) {
+function introduceYourself({name,age,favouriteFood}) {
   console.log(
     `Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`
   );

Sprint-1/destructuring/exercise-2/exercise.js

@@ -70,3 +70,29 @@ let hogwarts = [
     occupation: "Teacher",
   },
 ];
+//Task 1
+function searchByHouse(arr, houseName) {
+  let result = [];
+  for (let n of arr) {
+    let { firstName, lastName, house } = n;
+    if (house === houseName) {
+      result.push(`${firstName} ${lastName}`);
+    }
+  }
+  return result.join("\n");
+}
+//Task 2
+function havePet(arr) {
+  let result = [];
+  for (let n of arr) {
+    let { firstName, lastName, pet, occupation } = n;
+    if (occupation === "Teacher" && pet !== null && pet !== undefined && pet !== "") {
+      result.push(`${firstName} ${lastName}`);
+    }
+  }
+  return result.join("\n");
+}
+
+// Test the functions
+console.log(searchByHouse(hogwarts, "Gryffindor"));
+console.log(havePet(hogwarts));

Sprint-1/destructuring/exercise-3/exercise.js

@@ -6,3 +6,33 @@ let order = [
   { itemName: "Hot Coffee", quantity: 2, unitPricePence: 100 },
   { itemName: "Hash Brown", quantity: 4, unitPricePence: 40 },
 ];
+
+//this function calculate the total of our array of objects and return the total in pounds.
+function findTotal(arrayInput) {
+  let priceItem = [];
+  for (let n of arrayInput) {
+    let { itemName, quantity, unitPricePence } = n;
+    priceItem.push(unitPricePence * quantity);  //i pushed all individual item prices to my array.
+  }
+  return priceItem.reduce((a, b) => a + b, 0) / 100; //suming using reduce method , and change the value to pounds
+}
+// Print the receipt with itemized list and total
+function receiptPrinter(arrayInput) {
+  let headerLine = "QTY     ITEM                TOTAL";
+  let resultArr = [];
+  let total = findTotal(arrayInput); //i get the total using higher order function findTotal.
+  for (let n of arrayInput) {
+    let { itemName, quantity, unitPricePence } = n;
+    let totalItemPrice = (unitPricePence * quantity) / 100;
+    let quantityCol = String(quantity).padEnd(5); //this makes sure that the quantity column is 5 characters long.
+    let itemCol = itemName.padEnd(20);
+    let priceCol = totalItemPrice.toFixed(2).padStart(5);
+    resultArr.push(`${quantityCol}${itemCol}${priceCol}`); // storing each item's data in an array. no need to make space between the columns since the padEnd and padStart methods are used.
+  }  
+  //the content of the reciept to be seen in the console
+  console.log(headerLine);
+  console.log(resultArr.join("\n"));
+  console.log(`Total: ${total.toFixed(2)}`);
+}
+
+receiptPrinter(order);