Cacher is the code snippet organizer for pro developers

\!h  Passing functions as arguments
var years = [1990, 1965, 1937, 2005, 1998];

function arrayCalc(arr, fn) {
    var arrRes = [];
    for (var i = 0; i < arr.length; i++) {
        arrRes.push(fn(arr[i]));
    }
    return arrRes;
}

function calculateAge(el) {
    return 2016 - el;
}

function isFullAge(el) {
    return el >= 18;
}

function maxHeartRate(el) {
    if (el >= 18 && el <= 81) {
        return Math.round(206.9 - (0.67 * el));
    } else {
        return -1;
    }
}

var ages = arrayCalc(years, calculateAge);
var fullAges = arrayCalc(ages, isFullAge);
var rates = arrayCalc(ages, maxHeartRate);

console.log(ages);
console.log(rates);


\!h   Functions returning functions
function interviewQuestion(job) {
    if (job === 'designer') {
        return function(name) {
            console.log(name + ', can you please explain what UX design is?');
        }
    } else if (job === 'teacher') {
        return function(name) {
            console.log('What subject do you teach, ' + name + '?');
        }
    } else {
        return function(name) {
            console.log('Hello ' + name + ', what do you do?');
        }
    }
}

var teacherQuestion = interviewQuestion('teacher');
var designerQuestion = interviewQuestion('designer');


teacherQuestion('John');
designerQuestion('John');
designerQuestion('jane');
designerQuestion('Mark');
designerQuestion('Mike');

interviewQuestion('teacher')('Mark');