/**

* Concat, slice and splice

*/

let array1 = [1, 2, 3, 4];

let array2 = [4, 3, 2, 1];

/**

* Concat join two arrays, and return a new instace of Array with the result. Dont alter both originals arrays

*/

const concatArrays = () => {

let array3 = array1.concat(array2);

console.log(array3);

}

/**

* Slice return a copy of part of an array in a new instace of Array. Dont alter original array.

*/

const sliceArrays = () => {

//The begin position is included, and the end position is excluded

let arraySliced = array1.slice(0, 2);

console.log(arraySliced);

}

/**

* Splice returns a part of an array, deleting it from the original array.

*/

const spliceArrays = () => {

//The begin position is included, and the end position is excluded

let arraySpliced = array1.splice(0, 2);

console.log(`Subarray: ${arraySpliced}`);

console.log(`New array: ${array1}`);

}

concatArrays();

sliceArrays();

spliceArrays();