JavaScript tips and tricks to be a better developer
Hari Haran😎
Posted on May 7, 2020
These are some of the very basic Javascript methods that will help you get better in Javascript.
Let's straightly jump into coding.. 💥
Fill array with data
var myArray = new Array(10).fill('A');
console.log(myArray);
//Output
[ 'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A' ]
Merge Arrays
var bikes = ['TVS', 'BMW', 'Ducati'];
var cars = ['Mercedes', 'Ford', 'Porsche'];
var autoMobiles = [...bikes, ...cars];
console.log(autoMobiles);
//Output
[ 'TVS', 'BMW', 'Ducati', 'Mercedes', 'Ford', 'Porsche' ]
Intersection of arrays
var setA = [5, 10, 4, 7, 1, 3];
var setB = [3, 11, 1, 10, 2, 6];
var duplicatedValues = [...new Set(setA)].filter(x => setB.includes(x));
console.log(duplicatedValues);
//Output
[ 10, 1, 3 ]
Remove falsy values
var mixedArray = [12, 'web development', '', NaN, undefined, 0, true, false];
var whatIsTrue = mixedArray.filter(Boolean);
console.log(whatIsTrue);
//Output
[ 12, 'web development', true ]
Get random value
var numbers = [];
for (let i = 0; i < 10; i++) {
numbers.push(i);
}
var random = numbers[Math.floor(Math.random() * numbers.length)];
console.log(random);
//Output
4
Reverse an Array
var reversedArray = numbers.reverse();
console.log(reversedArray);
//Output
[ 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 ]
Sum of all values in array
var sumOfAllNumbers = numbers.reduce((x, y) => x + y);
console.log(sumOfAllNumbers);
//Output
45
Remove duplicates from array
var duplicatedArray = ['hello','hello','web developers']
var nonDuplicatedArray = [...new Set(duplicatedArray)];
console.log(nonDuplicatedArray);
//Output
[ 'hello', 'web developers' ]
Thanks for reading. I hope this gave you an some insights about the JavaScript array methods. Keep following and Stay tuned for more amazing blogs.
💖 💪 🙅 🚩
Hari Haran😎
Posted on May 7, 2020
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