Flutter Best Practices — Part 4

Flutter Best Practices — Part 4

Here are the new set of 5 Best practices to become a pro flutter developer

The other parts of this series links are provided at the end of this article.

1. Use final/const keyword for unmodified variables

“final” means single-assignment: a final variable or field must have an initializer. Once assigned a value, a final variable’s value cannot be changed. final modifies variables.

final should be used over const if you don’t know the value at compile time, and it will be calculated/grabbed at runtime.

if you have a const collection, everything inside of that is in const. If you have a final collection, everything inside of that is not final.

There are lot more differences and examples for more understanding.

// Don’t
String firstName = “John”
int a = 1
// Do
final String firstName = “John”
const int a = 1
//or const a = 1

2. Don’t use ‘+’ for concatenating strings, use string interpolation

// Don't
final String firstName = "John";
final String text = firstName + " Doe"