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

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

dayInYear(new Date()); // 12

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>

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Object.keys(myObject).length;

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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]

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

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

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

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// If you know multiple values

const items = ['a', 'b', 'c', 'd', 'e', 'f'];
const valuesToRemove = [ 'c', 'd' ];
const filteredItems = items.filter(( item ) => !valuesToRemove.includes( item ));
// ["a", "b", "e", "f"]

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const PromiseArray = [
  Promise.resolve(100),
  Promise.reject(null),
  Promise.resolve("Data release"),
  Promise.reject(new Error('Something went wrong'))];

Promise.all(PromiseArray)
  .then(data => console.log('all resolved! here are the resolve values:', data))
  .catch(err => console.log('got rejected! reason:', err))

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[0, 10, 4, 9, 123, 54, 1].sort((a, b) => a - b);

>>> [0, 1, 4, 9, 10, 54, 123]