All in all there are two types of important null or falsey checking that you’ll be using in JavaScript: Logical OR (||) Null Coalescence (??) Both of these will help you write better and more maintainable code. And when I say null checking, I mean returning a value other than…

In Dart, optional parameters can be defined by using brackets [ ] to let the compiler know these parameters are optional. Here [String? optional] is an optional parameter. Also note, that whenever you have an optional parameter, it always can be null.

In a function, we can specify optional parameters by using a question mark (?). An optional parameter by be good if passing in this parameter is optional, meaning it can be null or undefined. …

When it comes to object destructuring we usually use a property from an object to destructure in a variable. But what if we’d like to change the name of that variable into something different? We can usually destructure an object like so: // A simple object const myComplextObject = {…

Tuple destructing can be fairly simple in TypeScript. Given a standard tuple with a max of 2 values: // Standard 2 value Tuple const myTuple: [string, boolean] = ['value', false]; One could expect to destructure this tuple like so: const myTuple: [string, boolean] = ['value', false]; // Destructure the Tuple into 2 values const [myTupleString, myTupleBoolean] = myTuple; console.log(myTupleString) // value console.log(myTupleBoolean) // false

In Dart, we can define a simple Tuple with a max length of 2. When Tuples have a length of 2, I like to assign labels as key, value respectively. This is just experimental and a learning process for myself. To define a Tuple, it’s really simple. We will create an immutable class that can be assigned 2 types. A key and a value. This will have a max length of 2. @immutable class Tuple<K, V> { const Tuple(this.key, this.value); final K key; final V value; } void main() { const myTuple = Tuple<String, int>('myKey', 1234); }

A Tuple is a data structure type that has a finite number of properties, 2 specifically in this example. Defining a Tuple in Typescript is pretty easy: let myTuple: [boolean, number]; myTuple = [true, 1]; console.log(myTuple); // [true, 1] Optional Elements We can alternatively define optional types as an element as well…

Sometimes values in TypeScript are not used until they are set after they are created. An example of this in the Dart language would be the late assignment keyword. Check out the code below: var myGlobalString: string; // undefined // Here we use the setGlobalString function to assign a string to…

If you use a Social Provider like Google or Facebook to sign into your application via Flutter Amplify, chances are when you call Amplify.Auth.signOut() and the user requests to sign out via a Logout button somewhere, you will see the web browser pop up to log the user out. To avoid this issue, use isPreferPrivateSession: true to let Amplify know not to open the browser to log the user out. This can be especially useful with IOS in the authentication flow.