A couple of lodash methods to whet your appetite

lodash-test.js

// *********** Simple but awesome ***********
console.log("random num", _.random(10, 20));

// *********** Loop it ***********
_.times(5, function(i) {
  console.log("adding", i + 2);
});

let testArr = ["wow", "neat", "cool"];

let myArr = _.times(testArr.length, function(i) {
  return testArr[i].toUpperCase() + "!"
});
console.log("myArr", myArr );

// *********** Map it ***********
// Fetch the name of the first pet from each owner
let ownerArr = [
  {
    "owner": "Colin",
    "pets": [{"name":"dog1"}, {"name": "dog2"}]
  }, 
  {
    "owner": "John",
    "pets": [{"name":"dog3"}, {"name": "dog4"}]
  }
];

// regular JS way
// ownerArr.map(function(owner) {
//   return owner.pets[0].name;
// })

_.map(ownerArr, 'pets[0].name');

// *********** Random element from array ***********
let luckyDraw = ["Colin", "Mary", "Fred", "Emerson", "Joan"];
// // let index = Math.floor(Math.random() * (luckyDraw.length))
// console.log(luckyDraw[index])
// console.log(_.sample(luckyDraw));

let posts = [
    { id: "1abc", title: "First blog post", content: "I love to post" },
    { id: "2abc", title: "Second blog post", content: "Here's my opinion" },
    // more blog posts
    { id: "34abc", title: "The blog post we want", content: "lodash is awesome" }
    // even more blog posts
];

// using JS filter
// let post = posts.filter(function(item) {
//   return item.id === "34abc"
// });
// console.log("post", post[0].content );

posts = _.keyBy(posts, "id");
console.log(posts["34abc"].content);