JS Reusable Function
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//Array Map
const newArray = ['Harry', 'Ron', 'Jeff', 'Thomas'].map((name) => { return `${name}!`});//callback function
console.log(newArray);
//Array Filter
const truthyArray = [1, '', 'Hallo', 0, null, 'Harry', 14].filter((item) => Boolean(item));
console.log(truthyArray);
const students = [
{
name: 'Harry',
score: 60,
},
{
name: 'James',
score: 88,
},
{
name: 'Ron',
score: 90,
},
{
name: 'Bethy',
score: 75,
}
];
const eligibleForScholarshipStudents = students.filter((student) => student.score > 85);
console.log(eligibleForScholarshipStudents);
//Array Reduce
const murids = [
{
name: 'Harry',
score: 80,
},
{
name: 'James',
score: 88,
},
{
name: 'Ron',
score: 90,
},
{
name: 'Bethy',
score: 75,
}
];
const totalScore = students.reduce((acc, murid) => acc + murid.score, 0);
console.log(totalScore);
//Array Some
const array = [1, 3, 5];
const even = array.some(element => element % 2 === 0);
console.log(even);
//Array Sort
const months = ['March', 'Jan', 'Feb', 'Dec'];
months.sort();
console.log(months);
// output: [ 'Dec', 'Feb', 'Jan', 'March' ];
const array1 = [1, 30, 4, 1000, 101, 121];
array1.sort();
console.log(array1);
// output: [ 1, 1000, 101, 121, 30, 4 ]
const array2 = [1, 30, 4, 1000];
const compareNumber = (a, b) => {
return a - b;
};
const sorting = array2.sort(compareNumber);
console.log(sorting);
//Array Every
const scores = [70,85,90];
const minimumScore = 70;
const examPassed = scores.every(score => score >= minimumScore);
console.log(examPassed);
//Array ForEach
JavaScript
INFO