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102 lines
2.3 KiB
102 lines
2.3 KiB
//console.log(countries)
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//alert('Open the browser console whenever you work on JavaScript')
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//alert('Open the console and check if the countries has been loaded')
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// Exercise Level 1 for Day 5
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// Exercise 1
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const emptyArray = Array();
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console.log(emptyArray);
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// Exercise 2
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const fiveElements = [1,2,3,4,5];
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// Exercise 3
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console.log(fiveElements.length)
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// Exercise 4
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const firstItem = fiveElements[0];
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const lastItem = fiveElements[4];
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const middleItem = fiveElements[2];
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console.log(firstItem)
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console.log(lastItem)
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console.log(middleItem)
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// Exercise 5
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const mixedDataTypes = ['Gideon', [1,2,3,4,5] , 2002, true, null, undefined]
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console.log(mixedDataTypes.length)
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// Exercise 6
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const itCompanies = ['facebook', 'google', 'microsoft', 'apple', 'IBM', 'oracle', 'amazon'];
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// Exercise 7
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console.log(itCompanies);
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// Exercise 8
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console.log(itCompanies.length)
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// Exercise 9
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const firstCompany = itCompanies[0];
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const lastCompany = itCompanies[itCompanies.length - 1];
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const middleIndex = Math.floor(itCompanies.length / 2);
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const middleCompany = itCompanies[middleIndex];
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console.log(firstCompany);
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console.log(lastCompany);
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console.log(middleCompany);
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// Exercise 10
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for (const company of itCompanies) {
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console.log(company);
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}
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// Exercise 11
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console.log(itCompanies[0].toUpperCase());
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console.log(itCompanies[1].toUpperCase());
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console.log(itCompanies[2].toUpperCase());
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console.log(itCompanies[3].toUpperCase());
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console.log(itCompanies[4].toUpperCase());
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console.log(itCompanies[5].toUpperCase());
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console.log(itCompanies[6].toUpperCase());
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// Exercise 12
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const sentence = itCompanies.join(',') + 'are big IT companies.'
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console.log(sentence)
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// Exercise 13
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const checkCompany = prompt('Input IT company: ').toLowerCase();
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if (itCompanies.includes(checkCompany)) {
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console.log(`${checkCompany} is an IT company`);
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} else {
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console.log(`Sorry ${checkCompany} is not found.`);
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}
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// Exercise 14
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// Exercise 15
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console.log(itCompanies.sort())
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// Exercise 16
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console.log(itCompanies.reverse())
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// Exercise 17
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const firstThreeCompanies = itCompanies.slice(0, 3)
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console.log(firstThreeCompanies)
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// Exercise 18
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const lastThreeCompanies = itCompanies.slice(-3)
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console.log(lastThreeCompanies)
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// Exercise 19
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// Exercise 20
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// Exercise 21
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// Exercise 22
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// Exercise 23
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