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JAVASCRIPT CHEATSHEET 1

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Innocent answered on December 9, 2020 Popularity 6/10 Helpfulness 1/10

answer JAVASCRIPT CHEATSHEET 1

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JAVASCRIPT CHEATSHEET 1

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// STRING
// string[index] - get a certain character of a string
// string.length - return the number of characters in a string
// string.split(' ') - returns an array of words of a string
// string.split('') - returns an array of characters of a string
// string.toLowerCase() - returns a lowercased string
// string.toUpperCase() - returns an uppercased string
// string.includes('subtring') - checks whether a substring exists inside of a string [check the characther case]

// ARRAY
// array[index] - returns a certain value from an array
// array.indexOf('value') - returns the index of the first occurance of that value
// array.length - returns the number of elements in the array
// array.join('') - returns a string of array values
// array.push(value) - adds the value to the end of the array
// array.pop() - removes the value from the end of the array
// array.unshift(value) - adds the value to the start of the array
// array.shift() - removes the value from the start of the array
// array.splice(fromIndex, number_of_elements) - removes the number_of_elements, starting from fromIndex from the array
// array.slice(fromIndex, toIndex) - copies a certain part of the array

// for - looping
const emojis = [ 'ðŸ˜€', 'ðŸ˜†', 'ðŸ™ƒ', 'ðŸ˜' ];
const wavingEmojis = [];

for (let i = 0; i < emojis.length; i++) {
   wavingEmojis.push(`ðŸ‘‹${emojis[i]}ðŸ‘‹`);
}

// forEach - array method for looping
emojis.forEach((emoji) => console.log(emoji));

// map - array method for looping BUT IT HAS RETURNS
const wavingEmojis = emojis.map((emoji) => `ðŸ‘‹${emoji}ðŸ‘‹`);

// filter
const numbers = [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ];

const numbersBiggerThanFive = numbers.filter((number) => number > 5);

// sort
const numbers = [ 3, 4, 1, 5, 4, 7, 2, 23, 12 ];

const sortFromSmalles = numbers.sort((a, b) => a - b);
const sortFromLargest = numbers.sort((a, b) => b - a);

// VALUE VS REFERENCE (part 1: intro)
// arrays
const numbers = [ 1, 2, 3, 4 ]; // #123asd
const anotherNumbers = numbers; // #123asd

anotherNumbers.push(5);

// objects
const person = { 
    firstName: 'John', 
    lastName: 'Doe' 
};

const anotherPerson = person;

anotherPerson.lastName = 'DOEEEE';

console.log(numbers === anotherNumbers); // true
console.log(person === anotherPerson) // true

// VALUE VS REFERENCE (part 2: CLONING ARRAYS AND OBJECTS)
// SHALLOW CLONING - ONE LEVEL DEEP
const original = [ 1, 2, 3 ];
const newOriginal = [...original];

// DEEP CLONING - TWO LEVELS DEEP
const users = [ { name: 'John', age: 25 }, { name: 'Victor', age: 25 }, { name: 'Adrian', age: 25 } ];
const newUsers = JSON.parse(JSON.stringify(users));

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: cdn.fs.teachablecdn.com

Tags: javascript

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Contributed on Jun 01 2022

Innocent

0 Answers Avg Quality 2/10

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javascript cheat sheet

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Best Cheat Sheet:
https://websitesetup.org/wp-content/uploads/2020/09/Javascript-Cheat-Sheet.pdf

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 04 2021

Lorenzo Satta Chiris

0 Answers Avg Quality 2/10

javascript cheatsheet

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Finally found out JavaScript Cheatsheet in PDF format :)

Check this 4 JavaScript Cheatsheet in PDF format:
https://buggyprogrammer.com/cheat-sheet-for-javascript

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: buggyprogrammer.com

Tags: javascript j

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Contributed on May 18 2021

Darkstar

0 Answers Avg Quality 2/10

list of javascript cheat sheet

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.every(n => ...) => Boolean // ie9+
.some(n => ..) => Boolean   // ie9+

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: devhints.io

Tags: javascript j

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Contributed on Mar 02 2021

DevLorenz02

0 Answers Avg Quality 2/10

javascript cheatsheet

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//get cheatsheet of other languages too
https://github.com/LeCoupa/awesome-cheatsheets/blob/master/languages/javascript.js
https://github.com/mbeaudru/modern-js-cheatsheet

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: github.com

Tags: javascript j

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Contributed on Mar 24 2022

ekkamrit

0 Answers Avg Quality 2/10

list of javascript cheat sheet

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.find(n => ...)  // es6
.findIndex(...)  // es6

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: devhints.io

Tags: javascript j

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Contributed on Mar 02 2021

DevLorenz02

0 Answers Avg Quality 2/10

list of javascript cheat sheet

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// before -- [_,_,NEW,REF,_,_]
list.splice(list.indexOf(REF), 0, NEW))

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: devhints.io

Tags: javascript j

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Contributed on Mar 02 2021

DevLorenz02

0 Answers Avg Quality 2/10

javascript cheatsheet

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document.getElementById("elementID").innerHTML = "Hello World!";

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: htmlcheatsheet.com

Tags: javascript j

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Contributed on Mar 18 2021

Yucky Yak

0 Answers Avg Quality 2/10

javascript cheat sheet

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-1

/* Convenient interactive cheat sheet */ 'https://htmlcheatsheet.com/js/'
/* PDF VERSION */'https://websitesetup.org/wp-content/uploads/2020/09/Javascript-Cheat-Sheet.pdf'

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Dec 09 2020

Uvays Bakoyev

0 Answers Avg Quality 2/10

list of javascript cheat sheet

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re = list.splice(1)     // re = [b,c,d,e]  list == [a]
re = list.splice(1,2)   // re = [b,c]      list == [a,d,e]

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: devhints.io

Tags: javascript j

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Contributed on Mar 02 2021

DevLorenz02

0 Answers Avg Quality 2/10

list of javascript cheat sheet

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.map(n => ...)   // ie9+
.reduce((total, n) => total) // ie9+
.reduceRight(...)

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: devhints.io

Tags: javascript j

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Contributed on Mar 02 2021

DevLorenz02

0 Answers Avg Quality 2/10

JAVASCRIPT CHEATSHEET 1

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