Category: 11. Dart

A package is a mechanism to encapsulate a group of programming units. Applications might at times need integration of some third-party libraries or plugins. Every language has a mechanism for managing external packages like Maven or Gradle for Java, Nuget for .NET, npm for Node.js, etc. The package manager for Dart is pub. Pub helps to…

Dart is an optionally typed language. Collections in Dart are heterogeneous by default. In other words, a single Dart collection can host values of various types. However, a Dart collection can be made to hold homogenous values. The concept of Generics can be used to achieve the same. The use of Generics enforces a restriction on…

Dart, unlike other programming languages, doesn’t support arrays. Dart collections can be used to replicate data structures like an array. The dart:core library and other classes enable Collection support in Dart scripts. Dart collections can be basically classified as − Sr.No Dart collection & Description 1 ListA List is simply an ordered group of objects.…

Object-Oriented Programming defines an object as “any entity that has a defined boundary.” An object has the following − The period operator (.) is used in conjunction with the object to access a class’ data members. Example Dart represents data in the form of objects. Every class in Dart extends the Object class. Given below is a…

With the help of PHP’s built-in functions and libraries, we can handle manipulation of XML data. XML, which stands for eXtensible Markup Language, is a data format for structured document interchange, especially on the Web. XML is a popular file format used for serialization of data storing the data, transmitting it to another location, and…

An interface defines the syntax that any entity must adhere to. Interfaces define a set of methods available on an object. Dart does not have a syntax for declaring interfaces. Class declarations are themselves interfaces in Dart. Classes should use the implements keyword to be able to use an interface. It is mandatory for the implementing class to…

Functions are the building blocks of readable, maintainable, and reusable code. A function is a set of statements to perform a specific task. Functions organize the program into logical blocks of code. Once defined, functions may be called to access code. This makes the code reusable. Moreover, functions make it easy to read and maintain…

An enumeration is used for defining named constant values. An enumerated type is declared using the enum keyword. Syntax Where, Each of the symbols in the enumeration list stands for an integer value, one greater than the symbol that precedes it. By default, the value of the first enumeration symbol is 0. For example Example Live Demo…

Strings are a sequence of characters. Dart represents strings as a sequence of Unicode UTF-16 code units. Unicode is a format that defines a unique numeric value for each letter, digit, and symbol. Since a Dart string is a sequence of UTF-16 code units, 32-bit Unicode values within a string are represented using a special…

Symbols in Dart are opaque, dynamic string name used in reflecting out metadata from a library. Simply put, symbols are a way to store the relationship between a human readable string and a string that is optimized to be used by computers. Reflection is a mechanism to get metadata of a type at runtime like…