Arrows.java

/*
JavaScript ES6 Arrows

Arrows are a great way to make your code expressive and easier on the eyes. 
Here's some useful videos related to the topic:


Arrows

An arrow function expression (also known as a fat arrow function) has a shorter syntax compared to function expressions. Arrow functions are always anonymous.

SAMPLE CODE

var digits = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
var even_digits = digits.filter( num => num % 2 === 0 );
console.log(even_digits);   // [ 0, 2, 4, 6, 8 ]

var names = [ "Hacker", "Rank", "Website" ];  
var names_length = names.map( name => name.length );
console.log(names_length);  // [ 6, 4, 7 ]
OUTPUT

[ 0, 2, 4, 6, 8 ]
[ 6, 4, 7 ]
Arrows share the same lexical this as their surrounding code.

SAMPLE CODE

var employee = {
    _name : "Vineet",
    _task : ["test the beta.", "debug the code.", "create challenges."],
    _printTask() {
        this._task.forEach( t => console.log(this._name + " has to " + t));
    }
};

employee._printTask();
OUTPUT

Vineet has to test the beta.
Vineet has to debug the code.
Vineet has to create challenges.
Task

You are given a variable, my_function. Your task is to assign it with an arrow function. 
The my_function should take an array as its parameter and return an array with all its even elements incremented by 11, and odd elements decremented by 11.

Note

DON'T use function instead of an arrow function.
DON'T print anything on the console.
Replace the blank (_________) with an arrow function.
The name of the array parameter can be anything. For example, some_array.
*/

// write the correct arrow function here
var my_function = (some_array) => some_array.map((item) => item % 2 === 0? ++item: --item);