msb-public
/
30-Days-Of-React
mirror of https://github.com/Asabeneh/30-Days-Of-React
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started to complete the challenge

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pull/396/head
Rimvydas Kersys 2 years ago
parent 8b41cd49c3
commit 0f65db9196
7 changed files with 171 additions and 0 deletions
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129
01_Day_JavaScript_Refresher/01_javascript_refresher/Array Exercises/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
const array = [];
// 2
const array2 = Array.from({length: 6}, (v, i) => i + 1);
// 3
console.log(array2.length + '\n');
// 4
console.log("first item: " + array2[0] + " middle item: " + array2[Math.floor(array2.length / 2)] + " last item: " + array2[array2.length - 1] + "\n");
// 5
const mixedDataTypes = ["string", 1, true, null, undefined, {name: "John"}, [1, 2, 3]];
// 6
let itCompanies = ["facebook", "google", "Microsoft", "Apple", "IBM", "Oracle", "Amazon"];
// 7
console.log(itCompanies);
// 8
console.log("\n" + itCompanies.length + "\n");
// 9
console.log(itCompanies[0], itCompanies[Math.floor(itCompanies.length / 2)], itCompanies[itCompanies.length - 1] + "\n");
// 10
for (let index = 0; index < itCompanies.length; index++) {
console.log(itCompanies[index]);
}
console.log();
// 11
for (let index = 0; index < itCompanies.length; index++) {
itCompanies[index] = itCompanies[index][0].toUpperCase() + itCompanies[index].slice(1);
console.log(itCompanies[index]);
}
console.log();
// 12
console.log(itCompanies.join() + "\n");
// 13
function checkCompanyExists(company) {
let companyList = itCompanies.map(comp => comp.toUpperCase());
if (companyList.includes(company.toUpperCase())) {
return company;
} else {
return company + " not found";
}
}
console.log(checkCompanyExists("Facebook"));
console.log(checkCompanyExists("Amex"));
console.log();
// 14
itCompanies.map(company => {
if (company.indexOf('o') == company.lastIndexOf('o')) return company;
}).forEach(item => {
if (item != undefined)
console.log(item);
})
console.log();
// 15
itCompanies = itCompanies.sort()
console.log(itCompanies);
console.log();
// 16
itCompanies = itCompanies.reverse();
console.log(itCompanies);
console.log();
// 17
console.log(itCompanies.slice(3));
console.log();
// 18
console.log(itCompanies.slice(0, itCompanies.length-3));
console.log();
// 19
console.log(itCompanies.slice(1, itCompanies.length-1));
console.log();
// 20
itCompanies.shift()
console.log(itCompanies);
console.log();
// 21
itCompanies.splice(1, itCompanies.length-2)
console.log(itCompanies);
console.log();
// 22
itCompanies.pop();
console.log(itCompanies);
console.log();
// 23
console.log(itCompanies.splice());
console.log();

9
01_Day_JavaScript_Refresher/01_javascript_refresher/JS_to_webpage/externalScript.html
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<!DOCTYPE html>
<html>
<head>
<title>30DaysOfJavaScript:External script</title>
</head>
<body>
<script src="externalScript.js"></script>
</body>
</html>

1
01_Day_JavaScript_Refresher/01_javascript_refresher/JS_to_webpage/externalScript.js
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console.log('Welcome to 30DaysOfJavaScript');

9
01_Day_JavaScript_Refresher/01_javascript_refresher/JS_to_webpage/inlineScript.html
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<!DOCTYPE html>
<html>
<head>
<title>30DaysOfScript:Inline Script</title>
</head>
<body>
<button onclick="alert('Welcome to 30DaysOfJavaScript!')">Click Me</button>
</body>
</html>

12
01_Day_JavaScript_Refresher/01_javascript_refresher/JS_to_webpage/internalScript.html
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<!DOCTYPE html>
<html>
<head>
<title>30DaysOfScript:Internal Script</title>
</head>
<body>
<button onclick="alert('Welcome to 30DaysOfJavaScript!');">Click Me</button>
<script>
console.log('Welcome to 30DaysOfJavaScript')
</script>
</body>
</html>

10
01_Day_JavaScript_Refresher/01_javascript_refresher/JS_to_webpage/multipleExternalScripts.html
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<!DOCTYPE html>
<html>
<head>
<title>Multiple External Scripts</title>
</head>
<body>
<script src="externalScript.js"></script>
<script src="multipleExternalScripts.js"></script>
</body>
</html>

1
01_Day_JavaScript_Refresher/01_javascript_refresher/JS_to_webpage/multipleExternalScripts.js
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console.log("Hello, World!");
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