bobdobbalina

// NUMBER TO STRING
//==========================
const val = 1 + '';

console.log( val ); // Result: "1"
console.log( typeof val ); // Result: "string"

// STRING TO NUMBER
//==========================
let int = '15';

bobdobbalina

let array = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ];
array = array.slice( 0, 4 );

console.log( array ); // Result: [0, 1, 2, 3]


// OR

let array = [0, 1, 2, 3, 4, 5, 6, 6, 8, 9]
array.length = 4

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let array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];

console.log(array.slice(-1)); // Result: [9]
console.log(array.slice(-2)); // Result: [8, 9]
console.log(array.slice(-3)); // Result: [7, 8, 9]

bobdobbalina

Object.keys(myObject).length;

bobdobbalina

/* 
SAMPLE HTML

<div class="demo-grid">
    <div class="demo-card">
        <img width="200" height="200" src="https://placekitten.com/200/200?image=1" alt="" class="demo-img">
        <h1 class="line-clamp demo-title">
            Spill litter box, scratch at owner, destroy all furniture, especially couch
        </h1>
    </div>

bobdobbalina

function dayInYear(date){
  return Math.floor((date - new Date(date.getFullYear(), 0, 0)) / 1000 / 60 / 60 / 24);   
}

dayInYear(new Date()); // 12

bobdobbalina

var randomBoolean = Math.random() >= 0.5;

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let method = (/* True or false */ ? 'start' : 'stop');
array[method]();

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const serializeForm = form =>
  Array.from(new FormData(form), field => field.map(encodeURIComponent).join('=')).join('&');

serializeForm(document.querySelector('form') 
// full-name=Adrian%20Legaspi&email=adrian.luball%40gmail.com&nickname=ImLuyou

bobdobbalina

const formToObject = form =>
Array.from(new FormData(form)).reduce(
  (acc, [key, value]) => ({
    ...acc,
    [key]: value
  }),
  {}
);

formToObject(document.querySelector('form');