Merge 9d4415e83b into 09f408a1b7

solutions/day-01/conditionals-1.js

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+
+
+    //1. Get user input using prompt(“Enter your age:”). If user is 18 or older , give feedback:'You are old enough to drive' but if not 18 give another feedback stating to wait for the number of years he needs to turn 18.
+    let age = prompt('Enter your age: ');
+
+    if (age >= 18) {
+      alert('You are old enough to drive.')
+    } else {
+      alert(`You are left with ${18 - age} years to drive`)
+    };
+
+
+
+
+    //2. Compare the values of myAge and yourAge using if … else. Based on the comparison and log the result to console stating who is older (me or you). Use prompt(“Enter your age:”) to get the age as input.
+    let myAge = 42;
+    let yourAge = prompt('Enter your age: ');
+
+    if (yourAge > myAge) { alert(`you are ${yourAge - myAge} years older than me`) }
+    else if (yourAge < myAge) { alert(`you are ${myAge - yourAge} years younger than me`) }
+    else { alert('we have the same age!')
+    };
+
+
+
+    //3. If a is greater than b return 'a is greater than b' else 'a is less than b'. Try to implement it in two ways using "if else" and "ternary operator".
+    let a = 4;
+    let b = 3;
+
+    a > b ? console.log('a is greater than b') : console.log('a is less than b');
+
+    if (a>b) {console.log('a is greater than b')} else {console.log('a is less than b')};
+
+    //4. Even numbers are divisible by 2 and the remainder is zero. How do you check, if a number is even or not using JavaScript?
+    let evenOrOddNumber = prompt('Enter a number: ')
+    if (evenOrOddNumber % 2 == 0 ) {`${evenOrOddNumber} is an even number`}
+    else {`${evenOrOddNumber} is an odd number`}

solutions/day-01/conditionals-2.js

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+//1. Write a code which can give grades to students according to theirs scores:
+
+    //90-100, A
+    //70-89, B
+    //60-69, C
+    //50-59, D
+    //0-49, F
+
+
+    function gradeGenerator() {
+      let grade = Math.floor(Math.random() * 100)
+
+      switch(true) {
+
+     case (grade > 89) :
+     document.getElementById("result").innerHTML = "Your grade is: " + grade + "% (A)"
+    break;
+
+    case  (grade > 69 && grade < 90) :     document.getElementById("result").innerHTML = "Your grade is: " + grade + "% (B)"
+    break;
+
+    case  (grade > 59 && grade < 70) :     document.getElementById("result").innerHTML = "Your grade is: " + grade + "% (C)"
+    break;
+
+    case  (grade > 49 && grade < 60) :     document.getElementById("result").innerHTML = "Your grade is: " + grade + "% (D)"
+    break;
+
+    case  (grade < 50) :     document.getElementById("result").innerHTML = "Your grade is: " + grade + "% (F)"
+    break;
+
+      }
+    }

solutions/day-01/conditionals-3.js

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+
+  //1. Write a program which tells the number of days in a month.
+
+  //Enter a month: January
+  //January has 31 days.
+
+  //Enter a month: JANUARY
+  //January has 31 day
+
+  //Enter a month: February
+  //February has 28 days.
+
+  //Enter a month: FEbruary
+  //February has 28 days.
+
+  let month = prompt('Enter a month: ');
+  let monthCap = month.toUpperCase();
+
+  if ((monthCap == 'JANUARY') || (monthCap =='MARCH') || (monthCap =='MAY') || (monthCap =='JULY') || (monthCap =='AUGUST') || (monthCap =='OCTOBER') || (monthCap =='DECEMBER')) {alert(`${monthCap} has 31 days`)}
+
+  else if (monthCap == 'FEBRUARY') {alert(`FEBRUARY has 28 days and every four years 29 days`)}
+
+  else if ((monthCap == 'APRIL') || (monthCap =='JUNE') || (monthCap =='SEPTEMBER') || (monthCap =='NOVEMBER')){alert(`${monthCap} has 30 days`)}
+
+  else {alert(`${monthCap} is either not a month or you misspelled
+  the month`)}

solutions/day-01/countries.js

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+const countries = [
+  'Albania',
+  'Bolivia',
+  'Canada',
+  'Denmark',
+  'Ethiopia',
+  'Finland',
+  'Germany',
+  'Hungary',
+  'Ireland',
+  'Japan',
+  'Kenya',
+]
+
+
+//by bagaski

solutions/day-01/level1.js

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+const countries = [
+  'Albania',
+  'Bolivia',
+  'Canada',
+  'Denmark',
+  'Ethiopia',
+  'Finland',
+  'Germany',
+  'Hungary',
+  'Ireland',
+  'Japan',
+  'Kenya',
+]
+
+const webTechs = [
+  'HTML',
+  'CSS',
+  'JavaScript',
+  'React',
+  'Redux',
+  'Node',
+  'MongoDB',
+]
+
+//1. Declare an empty array;
+let arr = [];
+
+//2. Declare an array with more than 5 number of elements
+const arrX = ['food', 'drinks', 'games', 'books', 'sports', 'music', 'clothes'];
+
+//3. Find the length of your array
+const arrXlength = arr1.length;
+
+//4. Get the first item, the middle item and the last item of the array
+const arrX1st = arrX[0];
+const arrXmid = arrX[Math.floor(arrX.length/2)]
+const arrXend = arrX[arrX.length - 1]
+
+//5. Declare an array called mixedDataTypes, put different data types in the array and find the length of the array. The array size should be greater than 5
+let mixedDataTypes = [56, 'year: ', {a: 'height'}, 1978, 'name: ', true, 'Maria'];
+const mDtL = mixedDataTypes.length;
+
+//6. Declare an array variable name itCompanies and assign initial values Facebook, Google, Microsoft, Apple, IBM, Oracle and Amazon
+let itCompanies = ['Facebook', 'Google', 'Microsoft', 'Apple', 'IBM', 'Oracle', 'Amazon']
+
+//7. Print the array using console.log()
+console.log(itCompanies);
+
+//8. Print the number of companies in the array
+console.log(itCompanies.length);
+
+//9. Print out each company
+console.log(itCompanies);
+
+//10. Change each company name to uppercase one by one and print them out
+let itCompaniesStrng = itCompanies.toString();
+let caps = itCompaniesStrng.toUpperCase();
+console.log(caps);
+
+//11. Print the array like as a sentence: Facebook, Google, Microsoft, Apple, IBM, Oracle and Amazon are big IT companies.
+console.log(itCompanies.join(', ') + ' are big IT companies.');
+
+//12. Check if a certain company exists in the itCompanies array. If it exist return the company else return a company is not found
+itCompanies.includes('Nike')?"Nike exists":"Company is not found";
+
+//13. Filter out companies which have more than one 'o' without the filter method
+
+//14. Sort the array using sort() method
+itCompanies.sort();
+
+//15. Reverse the array using reverse() method
+itCompanies.reverse();
+
+//16. Slice out the first 3 companies from the array
+itCompanies.slice(0,3);
+
+//17. Slice out the last 3 companies from the array
+itCompanies.slice(itCompanies.length - 3);
+
+//18. Slice out the middle IT company or companies from the array
+
+
+//19. Remove the first IT company from the array
+itCompanies.shift();
+
+//20. Remove the middle IT company or companies from the array
+
+//21. Remove the last IT company from the array
+itCompanies.pop();
+
+//22. Remove all IT companies
+itCompanies.splice();
+
+//by bagaski

solutions/day-01/level3.js

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+import { countries } from './countries.js';
+
+
+//1. The following is an array of 10 students ages:
+const ages = [19, 22, 19, 24, 20, 25, 26, 24, 25, 24]
+
+//Sort the array and find the min and max age
+const agesOrder = ages.sort();
+const minAge = agesOrder[0];
+const maxAge = agesOrder[agesOrder.length - 1];
+
+//Find the median age(one middle item or two middle items divided by two)
+const medianAge = agesOrder[agesOrder.length * 0.5];
+
+//Find the average age(all items divided by number of items)
+const averageAge; //do i need 'for' loop?
+
+//Find the range of the ages(max minus min)
+const rangeOfAges = maxAge - minAge;
+
+//Compare the value of (min - average) and (max - average), use abs() method
+
+
+//2. Slice the first ten countries from the countries array
+let sliceFirstTenCuuntries = countries.slice(0, 11);
+
+//3. Find the middle country(ies) in the countries array
+const middleCountries = countries[countries.length * 0.5];
+
+//4. Divide the countries array into two equal arrays if it is even. If countries array is not even , one more country for the first half.
+const firstCountries = countries.slice(0, countries.length * 0.5 + 1);
+const secondCountries = countries.slice(countries.length * 0.5 - 1 , countries.length - 1)

solutions/day-01/main.js

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+//1. Create a separate countries.js file and store the countries array into this file, create a separate file web_techs.js and store the webTechs array into this file. Access both file in main.js file
+import { countries } from './countries.js';
+import { webTechs } from './webTechs.js';
+
+//2. First remove all the punctuations and change the string to array and count the number of words in the array
+let text =
+  'I love teaching and empowering people. I teach HTML, CSS, JS, React, Python.'
+
+const words = text.split(" ");
+
+console.log(words);
+console.log(words.length);
+
+//3. In the following shopping cart add, remove, edit items
+const shoppingCart = ['Milk', 'Coffee', 'Tea', 'Honey']
+
+    //add 'Meat' in the beginning of your shopping cart if it has not been already added
+      shoppingCart.shift();
+      shoppingCart.unshift('Meat');
+
+    //add Sugar at the end of you shopping cart if it has not been already added
+    shoppingCart.push('Sugar');
+
+    //remove 'Honey' if you are allergic to honey
+    shoppingCart.splice(3,1);
+
+    //modify Tea to 'Green Tea'
+    shoppingCart[2] = 'Green Tea';
+
+//4. In countries array check if 'Ethiopia' exists in the array if it exists print 'ETHIOPIA'. If it does not exist add to the countries list.
+let ETH = countries.includes('Ethiopia')
+ETH ? (console.log('ETHIOPIA')) : countries.push('Ethiopia')
+
+//5. In the webTechs array check if Sass exists in the array and if it exists print 'Sass is a CSS preprocess'. If it does not exist add Sass to the array and print the array.
+webTechs.includes('Sass') ? console.log('Sass is a CSS preprocess') : webTechs.push('Sass') && console.log(webTechs);
+
+
+//6. Concatenate the following two variables and store it in a fullStack variable.
+const frontEnd = ['HTML', 'CSS', 'JS', 'React', 'Redux'];
+const backEnd = ['Node', 'Express', 'MongoDB'];
+
+const fullStack = frontEnd.concat(backEnd);
+console.log(fullStack);
+
+//by bagaski

solutions/day-01/webTechs.js

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+const webTechs = [
+  'HTML',
+  'CSS',
+  'JavaScript',
+  'React',
+  'Redux',
+  'Node',
+  'MongoDB',
+]
+
+//by bagaski