const object = {'a': 1, 'b': 2, 'c' : 3};
for (const [key, value] of Object.entries(object)) { console.log(key, value);
}

let map = new Map();
map.set('key1', 'value1');
map.set('key2', 'value2');
for (let [key, value] of map.entries()) { console.log(key + ' - ' + value)
}

let map1 = new Map();
map1.set('name', 'Jack');
map1.set('age', '27');
// looping through Map
for (let [key, value] of map1) { console.log(key + '- ' + value);
}

let squares = [1,2,3,4].map(function (val) { return val * val;
});
// squares will be equal to [1, 4, 9, 16] 

var myMap = new Map();
myMap.set("0", "foo");
myMap.set(1, "bar");
myMap.set({}, "baz");
for (const [key, value] of Object.entries(myMap)) { console.log(key, value);
}

// Durations are in minutes
const tasks = [ { 'name' : 'Write for Envato Tuts+', 'duration' : 120 }, { 'name' : 'Work out', 'duration' : 60 }, { 'name' : 'Procrastinate on Duolingo', 'duration' : 240 }
];
const task_names = tasks.map(function (task, index, array) { return task.name;
});
console.log(task_names) // [ 'Write for Envato Tuts+', 'Work out', 'Procrastinate on Duolingo' ]

const loadAll = async function (imgArr) { try { let singleImage = imgArrItem => createImage(imgArrItem); // creates 3 promises const imgs = imgArr.map(singleImage); console.log(imgs); } catch (error) { console.log('Images not loaded'); }
};
loadAll(['img/img-1.jpg', 'img/img-2.jpg', 'img/img-3.jpg']);