Arrow Functions

    // ES6 (fat) Arrow functions
    // works best in callback function scenarios
    // parentheses around input if more than one
    // curly braces around function if more than one line / command
    // return only needed if more than one line of code
     
    let numbers = [123, 234, 345, 456, 567]
    let names = ['Alex', 'Bree', 'Cara', 'Cole', 'Devon', 'Riley'];
    
    // simple function syntax
    // create a new array of values from the array greater than 300 
    let big = numbers.filter(function(item){
        return item > 300;
    });
    
    // arrow function version - 1 parameter
    let bigA = numbers.filter( item => item > 300);
    
    console.log(big); 
    console.log(bigA);

    // simple function syntax
    names.forEach( function (item, index) { 
        console.log(index, item);
    })

    // arrow function version - 2 parameters
    names.forEach ( (item, index) => console.log(index, item) );