historydev

titles = ['title one', 'title two', 'title three']

searcheable.innerHTML = `<ul>
  ${ titles.map( t => `<li>${t}</li>` ).join('') }
</ul>`

/*
<ul>
 <li>title one</li><li>title two</li><li>title three</li>
</ul>
*/

import React, { useEffect } from 'react';

export default function GetContent() {

  const GetData = () =>  {
    ...
  };

  useEffect(() => {
		GetData().then(res => console.log(res));
  }, []);

  return (
    <div>
      	
    </div>
  )
}

year == 2015 ? alert('правильно') : alert('не правильно');

year == 2016 ? alert('правильно') : alert('не правильно');

year == 2015 || year == 2016 ? alert('правильно') : alert('не правильно');

const year = prompt('В каком году появилась спецификация ECMAScript-2015?');
alert( year == '2015' || year == '2016' ? 'правильно' : 'неправильно' );

array.reduce((accumulator, value, index) => {
	if (!(accumulator[index % 2] instanceof Array)) {
		accumulator[index % 2] = [];
	}

	accumulator[index % 2].push(value);

	return accumulator;
}, []);

array.reduce((accumulator, value, index) => {
	accumulator[index % 2].push(value);

	return accumulator;
}, [[], []]);

array.reduce((accumulator, value, index) => (accumulator[index % 2].push(value), accumulator), [[], []]);

array.reduce((a, v, i) => (a[i % 2].push(v), a), [[], []]);

const countOff = (array, count) => array.reduce((accumulator, value, index) => {
	accumulator[index % count].push(value);

	return accumulator;
}, Array.from({ length: count }, () => []));

countOff([1, 2, 3, 4, 5, 6], 2); // [[1, 3, 5], [2, 4, 6]]
countOff([1, 2, 3, 4, 5, 6], 3); // [[1, 4], [2, 5], [3, 6]]