HandyExtensions

Developed with 💙 by Ngonidzashe Mangudya

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Handy Extension is just a simple library with extensions to the core libraries to make them more handy and quicker to use.

I don't know how "deadly" this is but I just use it anyway.

Extensions On:

• BuildContext
• String
• int
• List
• DateTime
• Num
• Map
• Iterable
• Nullable String (probably useless 😂 but it's there)

Getting started

Add as a dependency

dependencies:
  handy_extensions: <version>

Usage

BuildContext

Navigate To A Page

context.goTo(page: const Home());

Navigate To A Page Replacing The Current Page

context.goTo(page: const Home(), replace: true);

Go Back To The Previous Page

context.goBack();

Navigate To A Page And Remove History

context.goToRefresh(page: const Login());

Notify The User Using A SnackBar

context.notify(message: 'Hello World', isError: false); // You can pass the isError argument or leave it, it will default to false

Get Screen Size (based on MediaQuery)

// Height
context.height;
// Width
context.width;

String

Country Emoji

String country = 'ZW';
String emoji = country.countryEmoji; // => 🇿🇼 (String)

Title Case

String title = 'hello world';
String titleCase = title.titleCase; // => Hello world

Heading Case

String heading = 'hello world';
String headingCase = heading.headingCase; // => Hello World

doubleOrNull

String? number = '1';
double? doubleNumber = number.doubleOrNull; // => 1.0 (double) or null (null)

intOrNull

String? number = '1';
int? intNumber = number.intOrNull; // => 1 (int) or null (null)

Map

swap

Map<String, int> map = {'a': 1, 'b': 2};
map.swap; // {1: 'a', 2: 'b'}

copy

Map<String, int> map = {'a': 1, 'b': 2};
map.copy; // {'a': 1, 'b': 2}

removeNulls

Map<String, int?> map = {'a': 1, 'b': null};
map.removeNulls; // {'a': 1}

adjustOrder

Map<String, int> map = {'a': 1, 'b': 2};
map.adjustOrder(1, 0); // {'b': 2, 'a': 1}

List

Partition into chunks

[1,2,3,4,5,6].partition(chunkSize: 3); // => [[1,2,3],[4,5,6]] (List<List<int>>). By default it will partition into chunks of 2

Random Item

// Will return a random item from the list of type T
["Hello", "World", "iAMNGONI"].randomItem();

Random Items

// Will return a list of random items from the list of type T. By default this may return a
// list with only one item
["Hello", "World", "iAMNGONI"].randomItems(count: 2);

firstWhereOrNull

List<String> list = ['a', 'b', 'c'];
String? character = list.firstWhereOrNull( (String item) => item == 'a'); // => 'a' (String) or null (null)

groupBy

[1,2,3,4,5,6].groupBy((i) => i % 2 == 0); // {true: [2, 4, 6], false: [1, 3, 5]}

swap

List<int> list = [1, 2, 3, 4, 5];
list.swap(0, 4); // [5, 2, 3, 4, 1]

swapRange

List<int> list = [1, 2, 3, 4, 5];
list.swapRange(0, 2, 3); // [4, 5, 3, 1, 2]

hasDuplicates

List<int> list = [1, 2, 3, 4, 5, 1];
list.hasDuplicates; // true

intersperse

List<int> list = [1, 2, 3, 4, 5, 1];
list.intersperse(100);
// [1, 100, 2, 100, 3, 100, 4, 100, 5, 100, 1]

updateWhere

List<int> numbers = [1, 2, 3, 4, 5];
numbers.updateWhere(
    (n) => n.isEven,  // predicate
    (n) => n * 2,     // update function
);
// [1, 4, 3, 8, 5]

// Works with any type
List<String> words = ['hello', 'world', 'dart'];
words.updateWhere(
    (s) => s.length <= 4,
    (s) => s.toUpperCase(),
);
// ['HELLO', 'world', 'DART']

Int

microsecond

Duration microsecond = 1.microsecond; // => 1

milliseconds

Duration milliseconds = 1.milliseconds; // => 1

seconds

Duration seconds = 1.seconds; // => 1

minutes

Duration minutes = 1.minutes; // => 1

hours

Duration hours = 1.hours; // => 1

days

Duration days = 1.days; // => 1

weeks

Duration weeks = 1.weeks; // => 1

Example usage of the above duration items

Duration duration = 1.weeks + 2.days + 3.hours + 4.minutes + 5.seconds + 6.milliseconds + 7.microseconds;

General

Check if variable is null

String? name = null;
name.isNull; // => true (bool)

Nullable Int

isInt

int? number = 1;
number.isInt; // => true (bool)

int? number = null;
number.isInt; // => false (bool)

Nullable String

isString

String? name = 'Ngoni';
name.isString; // => true (bool)

String? name = null;
name.isString; // => false (bool)

orEmpty

String? name = null;
name.orEmpty; // => '' (String)

String? name = 'Ngoni';
name.orEmpty; // => 'Ngoni' (String)

isNotReallyEmpty

String? name = null;
name.isNotReallyEmpty; // => false (bool)

String? name = ' ';
name.isNotReallyEmpty; // => false (bool)

String? name = 'Ngoni';
name.isNotReallyEmpty; // => true (bool)

Additional information

You can add in more extensions of your own -> share with the rest of the world.

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