London_10-Anna_Hrychaniuk-JavaScript-Core-1-Coursework-Week4

1-exercises/A-array-find/exercise.js

@@ -2,9 +2,6 @@
   You are given an array of names.
   Using .find(), we'd like to find the first name which starts with A and is longer than 7 letters.
 */
-
-// write your code here
-
 let names = [
   "Rakesh",
   "Antonio",
@@ -17,6 +14,16 @@ let names = [
   "Ahmed",
 ];
 
+function ifLonger7(name) {
+  return name.length > 7 && name.startsWith('A');
+}
+
+function findLongNameThatStartsWithA(names) {
+  return names.find(ifLonger7);
+}
+
+
+
 let longNameThatStartsWithA = findLongNameThatStartsWithA(names);
 
 console.log(longNameThatStartsWithA);

1-exercises/B-array-some/exercise.js

@@ -11,6 +11,14 @@ let pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 // If there is a null value in the array exit the program with the error code
 // https://nodejs.org/api/process.html#process_process_exit_code
 // process.exit(1);
+function isNegative(value) {
+  return value === null;
+}
+
+if (pairsByIndex.some(isNegative)) {
+    process.exit(1);
+  }
+
 
 let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];

1-exercises/C-array-every/exercise.js

@@ -5,7 +5,11 @@
 let students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 let group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-let groupIsOnlyStudents; // complete this statement
+function contain(name) {
+  return !students.includes(name);
+}
+
+let groupIsOnlyStudents = group.every(contain); // complete this statement
 
 if (groupIsOnlyStudents) {
   console.log("The group contains only students");

1-exercises/D-array-filter/exercise.js

@@ -8,7 +8,11 @@
 
 let pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-let pairsByIndex; // Complete this statement
+function onlyNumbers (number) {
+    return Array.isArray(number) && number.length === 2;
+}
+
+let pairsByIndex = pairsByIndexRaw.filter(onlyNumbers); // Complete this statement
 
 let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];

1-exercises/E-array-map/exercise.js

@@ -3,9 +3,15 @@
 
 let numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
-let numbersMultipliedByOneHundred; // complete this statement
+let numbersMultipliedByOneHundred = numbers.map(number => number*100); 
+
+let numbersMultiplied = numbers.map(function (number) {return number*100});
+
+let numbersMultipliedByHundred = numbers.map(number => {return number*100});// complete this statement
 
 console.log(numbersMultipliedByOneHundred);
+console.log(numbersMultiplied);
+console.log(numbersMultipliedByHundred);
 
 /* EXPECTED RESULT
 

1-exercises/F-array-forEach/exercise.js

@@ -9,6 +9,21 @@
 
 let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
+function fizzBuzz(item) {
+    if (item % 3 === 0 && item % 5 === 0){
+      item = "FizzBuzz";
+    }
+    else if (item % 3 === 0) {
+      item = "Fizz";
+    } else if (item % 5 === 0) {
+      item = "Buzz";
+    }
+    return item;
+  }
+
+  arr.map(fizzBuzz).forEach(number => console.log(number));
+
+
 /* EXPECTED OUTPUT */
 
 /*

1-exercises/G-array-methods/exercise.js

@@ -4,7 +4,7 @@
 */
 
 let numbers = [3, 2, 1];
-let sortedNumbers; // complete this statement
+let sortedNumbers = numbers.sort(); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/G-array-methods/exercise2.js

@@ -7,7 +7,7 @@
 let mentors = ["Daniel", "Irina", "Rares"];
 let students = ["Rukmini", "Abdul", "Austine", "Swathi"];
 
-let everyone; // complete this statement
+let everyone = mentors.concat(students); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise.js

@@ -15,8 +15,8 @@ let everyone = [
   "Swathi",
 ];
 
-let firstFive; // complete this statement
-let lastFive; // complete this statement
+let firstFive = everyone.slice(0,5); // complete this statement
+let lastFive = everyone.slice(-5); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise2.js

@@ -7,7 +7,11 @@
   Tip: use the string method .split() and the array method .join()
 */
 
-function capitalise(str) {}
+function capitalise(str) {
+  let bigLetter = str.split('');
+  bigLetter[0] = bigLetter[0].toUpperCase();
+  return bigLetter.join('');
+}
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise3.js

@@ -7,7 +7,7 @@
 let ukNations = ["Scotland", "Wales", "England", "Northern Ireland"];
 
 function isInUK(country) {
-  return; // complete this statement
+  return ukNations.includes(country); // complete this statement
 }
 
 /* 

1-exercises/I-string-replace/exercise.js

@@ -13,34 +13,36 @@
 let story =
   "I like dogs. One day I went to the park and I saw 10 dogs. It was a great day.";
 
-let result = story.replace("", "");
+let result = story.replace("dogs", "cats").replace("10 dogs", "100000 cats");
 
 /* EXPECTED OUTPUT */
 
-const util = require("util");
-
-function test(test_name, actual, expected) {
-  console.log("");
-  let status;
-  if (actual === expected) {
-    status = "PASSED";
-  } else {
-    status = `FAILED: \nexpected: ${util.inspect(
-      expected
-    )} \nbut your function returned: ${util.inspect(actual)}`;
-  }
-
-  console.log(`${test_name}: ${status}`);
-}
-
-test(
-  "1. Original story has not been changed",
-  story,
-  "I like dogs. One day I went to the park and I saw 10 dogs. It was a great day."
-);
-
-test(
-  "2. The result of the replace is correct",
-  result,
-  "I like cats. One night I went to the park and I saw 100000 cats. It was a brilliant night."
-);
+console.log(result);
+
+// const util = require("util");
+
+// function test(test_name, actual, expected) {
+//   console.log("");
+//   let status;
+//   if (actual === expected) {
+//     status = "PASSED";
+//   } else {
+//     status = `FAILED: \nexpected: ${util.inspect(
+//       expected
+//     )} \nbut your function returned: ${util.inspect(actual)}`;
+//   }
+
+//   console.log(`${test_name}: ${status}`);
+// }
+
+// test(
+//   "1. Original story has not been changed",
+//   story,
+//   "I like dogs. One day I went to the park and I saw 10 dogs. It was a great day."
+// );
+
+// test(
+//   "2. The result of the replace is correct",
+//   result,
+//   "I like cats. One night I went to the park and I saw 100000 cats. It was a brilliant night."
+// );

1-exercises/J-string-substring/exercise.js

@@ -6,7 +6,7 @@
 
 let statement = "I like programming and dogs";
 
-statement = statement.substring();
+statement = statement.substring(0, 19);
 
 console.log(statement);
 

1-exercises/J-string-substring/exercise2.js

@@ -14,11 +14,11 @@ let names = [
   "Arron Graham",
 ];
 
-names[0] = names[0].substring();
-names[1] = names[1].substring();
-names[2] = names[2].substring();
-names[3] = names[3].substring();
-names[4] = names[4].substring();
+names[0] = names[0].substring(0, 7);
+names[1] = names[1].substring(0, 7);
+names[2] = names[2].substring(0, 5);
+names[3] = names[3].substring(0, 5);
+names[4] = names[4].substring(0, 6);
 
 names.forEach((name) => {
   console.log(name);

1-exercises/J-string-substring/exercise3.js

@@ -8,7 +8,8 @@
 
 let statement = "I do not like programming";
 
-let result = "";
+let result = `${statement.substring(0, 4)}${statement.substring(8, statement.length)} `;
+
 
 console.log(result);
 

2-mandatory/1-create-functions.js

@@ -3,15 +3,17 @@ Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the first five elements of the passed array.
 */
-function first5() {
+function first5(array) {
+ return array.slice(0, 5);
 }
 
 /*
 Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the same elements, except sorted.
 */
-function sortArray() {
+function sortArray(array) {
+  return array.slice().sort();
 }
 
 /*
@@ -24,7 +26,8 @@ Write a function that:
 - Removes any forward slashes (/) in the strings.
 - Makes the strings all lowercase.
 */
-function tidyUpString() {
+function tidyUpString(array) {
+  return array.map(string => string.trim().replace("/", "").toLowerCase());
 }
 
 /*
@@ -33,9 +36,16 @@ Write a function that:
 - Returns a new array containing the same elements, but without the element at the passed index.
 */
 
-function remove() {
+function remove(array, index) {
+  let newArray = array.slice();
+  let firstPart = array.slice(0,index);
+  let lastPart = array.slice(index+1, newArray.length)
+  return firstPart.concat(lastPart); 
+  // return array.filter((_, i) => i !== index);
 }
 
+
+
 /*
 Write a function that:
 - Takes an array of numbers as input.
@@ -44,7 +54,12 @@ Write a function that:
 - Numbers greater 100 must be replaced with 100.
 */
 
-function formatPercentage() {
+function formatPercentage(array) {
+  return array.map(value => {
+    let notOver100 = Math.min(value, 100);
+    let roundedValue = Math.round(100*notOver100) / 100;
+    return `${roundedValue}%`
+  })
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

2-mandatory/2-oxygen-levels.js

@@ -11,7 +11,19 @@
     Some string methods that might help you here are .replace() and .substring().
 */
 
-function findSafeOxygenLevel() {}
+function findSafeOxygenLevel(planet) {
+  let checkPlanet = planet.filter(item => item.includes("%"));
+  let checkPlanet2 = checkPlanet.map(item => item.replace(/%/g, ""));
+  // checkPlanet2.map(item => parseFloat(item));
+  let checkPlanet3 = checkPlanet2.map(Number);
+  let checkPLanet4 = checkPlanet3.filter(item => item >19.5 && item < 23.5);
+  for (let num of checkPLanet4) {
+    if (19.5 < num && num < 23.5) {
+      return `${num}%`;
+    }
+  }
+  return checkPLanet4[0];
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/3-bush-berries.js

@@ -22,7 +22,11 @@
 */
 
 function isBushSafe(berryArray) {
-  //Write your code here
+  if (berryArray.every(berry => berry === "pink")) {
+    return "Bush is safe to eat from"
+  } else {
+    return "Toxic! Leave bush alone!"
+  }
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

2-mandatory/4-space-colonies.js

@@ -15,7 +15,10 @@
 
 */
 
-function getSettlers() {}
+function getSettlers(voyagers) {
+ let families = voyagers.filter(family => family.endsWith("family"));
+ return families.filter(family => family.startsWith("A"));
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/5-eligible-students.js

@@ -7,7 +7,15 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function getEligibleStudents() {}
+function getEligibleStudents(students) {
+  let eligible = [];
+  for (let student of students) {
+    if (student[1] >= 8){
+      eligible.push(student[0]);
+    }
+  }
+  return eligible;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */