Dart tutorial examples/ Flutter By Examples

This is a home page of Dart tutorials and examples.

Dart by examples

• Private Constructor
• Multiple Constructor
• Private variables
• Round double with limit
• Dynamic vs Object
• Check Dart and Flutter Version
• Get Hostname
• initialize final variable
• Round to decimal places
• Phone number validation
• Setter and Getter
• Delay Code execution
• Email validation
• Difference between var,final and dynamic
• Difference between const and final
• Singleton Design pattern
• Generate UUID
• Custom exception and handles it
• Measure elapsed time execution of a function

The following examples categorized based on feature

Operators

Operators are used to apply on operands.

• Cascade Operator
• Runtime check type

Primitive Types

• Check Integer is whole number or not
• Integer Division
• Integer Length
• Number of digits in a number
• Generate Random Number

Strings

String is an immutable object that contains group of characters enclosed in double quotes.

• Future<String to/from String
• Append Strings
• Capitalize first letter of a string
• Check String contains alphabetic or number
• String encode and decode
• String equal or not
• Get First,Last letter of a string
• String replace method
• String reverse
• String into Array
• Trim space in a string
• Check given variable is a string
• Generate Random String
• Print Dollar to a String
• String empty or null check
• String is numeric or not

Conversion programs

• Convert Int to Double viceversa
• Parse double to/from string
• Convert String to/from Int
• Decimal to/from Binary
• Decimal to hexa number
• Decimal to Octal number

Date and time code

• Convert String to Datetime
• Difference between two dates
• Compare two dates
• Current Date and time
• Current Epoch unix timestamp
• Add/Substract years,days,months hours to Current Date
• Dispay greeting message based on time of the day
• Find Last day of week,month,year
• Display Name of the week
• Check Leap year or not
• Dart timer delay
• Convert 24 hours to 12 hours timestamp
• Convert timestamp to Datetime
• Number of days between two dates

Function

• Function returns another Function
• Function return multiple values

Arrays programs

Array is a group of same data type with fixed size.

• Check an object exists in Array
• Sum of numbers

List

List is a group of same data type with dynamic size and elements are in insertion order, allow duplicates

• Duplicate list remove
• Immutable List
• Add an element to List at beginning
• Check sublist contains in a List
• List clone example
• Create an empty List
• Convert List<Dynamic> to List<String>
• List check for empty or null
• Compare two List equal or not
• List filter example
• Flatten a List
• Get First,Last element from a List
• Convert List to Map
• Remove element from a List
• Convert List to Set or viceversa
• Convert List of String to List of numbers
• Convert List to String
• Check variable type is a List
• Difference in List
• Convert FutureList to List
• multiple ways to iterate a List
• Add leading trailing zeroes to number
• Maximum and Minimum from a List
• Create Sequence of numbers
• Sort List of objects in ascending and descending
• Sort List of primitive types

Map, HashMap

Map is a datastructure with key and value pair of elements

• Create an Empty Map
• Check Map is empty or not
• Compare Map equal
• Convert Map to List of Objects
• Check Map is null or not
• Sort Map key and values
• Generate Query String from an Map

Set

Set is a group of same data type with dynamic size and elements are in unordered, does not allow duplicates.

• Create an Empty Set
• Set is Empty or not
• Compare two sets for equal

Objects

• Check Given object variable implements an interface
• Print Object

Enum constants conversions programs

• Convert Enum to Integer
• Convert Enum to String
• Add methods, values using Enum Extension
• Enum comparison operator
• Loop Enum and convert to/from index

File and directory-related code

• Read Image from a disk
• Get Extension and MIME type
• Get Filename and extension

Errors

Other examples

• Read string console
• Currency Number Format example

Logging

• Dart logging

Flutter

• Read pubspec.yaml file