array-method.js

let names = ['daroth','thida','kosal','dara'];
let others = ['sammy', 'gary','wolfgang','mark'];

let lost = [4, 8, 15, 16, 23, 42];
let fibonacci = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55];

var combine = lost.concat(fibonacci);
//console.log(combine);
//console.log(fibonacci.join('~'));
//push , pop

// console.log(lost.shift());
// console.log(lost);

// lost.unshift(1, 2, 3, 4);
// // console.log(lost);
// console.log(names);
// console.log(names.reverse());
// console.log(names.sort());

//console.log(others.indexOf('mark'));

console.log(combine);
console.log(combine.lastIndexOf(1));
//map

 var filtered = combine.filter((x) => {if(x <= 15) return x;});
// console.log(filtered);

// names.forEach((name) => console.log(`Hello ${name}`));
// console.log(filtered.every((num) => num < 10));
console.log(filtered.every((num) => num <  16));

// console.log(fibonacci.some((num) => num > 50));
// console.log(fibonacci.some((num) => num > 100));
console.log('Hello world!');