VincentDamour

var foo = { a: "a property" };
var bar = { b: 4, c: "an other property" }

var result = _.assign({ a: "an old property" }, foo, bar);
// result => { a: 'a property', b: 4, c: 'an other property' }

VincentDamour

function getRandomInteger() {
    return Math.round(Math.random() * 100);
}

var result = _.times(5, getRandomNumber);
// result => [64, 70, 29, 10, 23]

VincentDamour

function validateEmail() {
    // Validate email here and show error message if not valid
}

var emailInput = document.getElementById("email-field");
emailInput.addEventListener("keyup", _.debounce(validateEmail, 500));

VincentDamour

var bar = { foo: { key: "foo" } };
_.set(bar, "foo.items[0]", "An item");
// bar => { foo: { key: "foo", items: ["An item"] } }
var name = _.get(bar, "name", "John Doe");
// name => John Doe

VincentDamour

_.deburr("déjà vu");
// -> deja vu
_.deburr("Juan José");
// -> Juan Jose

VincentDamour

var posts = [
    { id: "1abc", title: "First blog post", content: "..." },
    { id: "2abc", title: "Second blog post", content: "..." },
    // more blog posts
    { id: "34abc", title: "The blog post we want", content: "..." }
    // even more blog posts
];

posts = _.keyBy(posts, "id");

VincentDamour

var users = [
    { name: "John", age: 30 },
    { name: "Jane", age: 28 },
    { name: "Bill", age: 65 },
    { name: "Emily", age: 17 },
    { name: "Jack", age: 30 }
]

var reducedUsers = _.reduce(users, function (result, user) {
    if(user.age >= 18 && user.age <= 59) {

VincentDamour

var original = { foo: "bar" };
var copy = original;
copy.foo = "new value";
// copy -> { foo: "new value" } Yeah!
// original -> { foo: "new value" } Oops!

var original = { foo: "bar" };
var copy = _.cloneDeep(original);
copy.foo = "new value";
// copy -> { foo: "new value" } Yeah!

VincentDamour

var sortedArray = [1, 1, 2, 3, 3, 3, 5, 8, 8];
var result = _.sortedUniq(sortedArray);
// -> [1, 2, 3, 5, 8]

VincentDamour

var users = [
  { firstName: "John", lastName: "Doe", age: 28, gender: "male" },
  { firstName: "Jane", lastName: "Doe", age: 5, gender: "female" },
  { firstName: "Jim", lastName: "Carrey", age: 54, gender: "male" },
  { firstName: "Kate", lastName: "Winslet", age: 40, gender: "female" }
];

var user = _.find(users, { lastName: "Doe", gender: "male" });
// user -> { firstName: "John", lastName: "Doe", age: 28, gender: "male" }