About this package
This package contains extensions that you may find useful in your projects. Developers familiar with the Kotlin language will find many familiar things for themselves, since the package contains many methods from this language and not only😊 Flutter extensions will be added in next versions.
Contributing
Please, consider contributing👍
- Add new feature
- Fix a bug
- Participate in discussions
- Provide documentation
- Create pull request
Dart
Custom classes
Pair
final Pair<int, int> x = Pair(2, 2);
Bool extensions
.not()
if(email.isEmpty.not()){
checkEmailIsValid(email);
}
.and()
if(isEmailValid.and(isPasswordValid)){
register(email, password);
}
.or()
if(hasGoodMarks.or(hasBenefits)){
// Action()
}
Object extensions
Logging
Just use indside your custom class methods
logInfo(String message, [dynamic error]);
// or
logError(String message, [dynamic error]);
// or
logDebug(String message, [dynamic error]);
// or
logWarning(String message, [dynamic error]);
// or
logWtf(String message, [dynamic error]);
Scope functions
final String? nullableString = null;
nullableString?.let((it) {
// Do something if string isn't null
});
final List<int> list = [1, 2, 3];
list.also((self) => print('List length ${self.length}'));
Iterable extensions
.elementAtOrNull()
final List<int> numbers = [1, 2, 3, 4, 5];
numbers.elementAtOrNull(numbers.length) // null
.find()
final List<int> numbers = [1, 2, 3, 4, 5];
numbers.find((e) => e >= 3) // 3
.getRandom()
final List<int> numbers = [1, 2, 3, 4, 5];
numbers.getRandom() // returns number from 1 to 5
.zip()
final List<int> firstList = [1, 2, 3];
final List<double> secondList = [1.0, 2.0, 3.0];
final List<Pair<int, double>> zipRes = firstList.zip(secondList).toList();
.mapIndexed()
final List<int> firstList = [1, 2, 3, 4, 5];
final List<int> secondList = [1, 2, 3, 4, 5];
firstList.mapIndexed((index, item) => item + secondList[index]);
.filter()
final List<Person> people = [Person('John', 14), Person('Max', 22)];
people.filter((e) => e.age > 18); // [Person('Max', 22)]
.filterNot()
final List<Person> people = [Person('John', 14), Person('Max', 22)];
people.filterNot((e) => e.age > 18); // [Person('John', 14)]
.filterNotNull()
final List<Person?> people = [Person('John', 14), null, Person('Max', 22)];
people.filterNotNull(); // [Person('John', 14), Person('Max', 22)]
.forEachIndexed()
final List<int> numbers = [1, 2, 3, 4, 5];
numbers.forEachIndexed((index, item) => print(index)});
List extensions
.plus()
final List<int> numbers = [1, 2, 3];
numbers.plus(1); // [2, 3, 4]
.minus()
final List<int> numbers = [1, 2, 3];
numbers.minus(1); // [0, 1, 2]
.multiply()
final List<int> numbers = [1, 2, 3];
numbers.multiply(2); // [2, 4, 6]
.divide()
Only available for list of doubles
final List<double> numbers = [2.0, 4.0, 3.0];
numbers.divide(2); // [1.0, 2.0, 1.5]
Full list of extensions
Custom classes
Pair
Bool extensions
.not()
.and(other)
.or(other)
Object extensions
Logging
logInfo(message, [error])
logError(message, [error])
logDebug(message, [error])
logWarning(message, [error])
logWtf(message, [error])
Scope functions
.let()
.also()
Iterable extensions
.elementAtOrNull(index)
.find(predicate)
.getRandom()
.zip(collection)
.mapIndexed()
.forEachIndexed()
.filter(predicate)
.filterNot(predicate)
.filterNotNull()
List extensions
.plus(number)
.minus(number)
.multiply(number)
.divide(number)
String extensions
.isNullOrEmpty
.isNotBlank
.last
.isAlphabetOnly()
.isEmailValid([pattern])
.isPasswordLengthLonger()
.anyChar(predicate)
.toInt()
.toIntOrNull()
.toDouble()
.toDoubleOrNull()
.capitalizeFirst()
.removeAllWhiteSpace()
.reversed()
.replaceAfter(delimiter, replacement, [defaultValue])
.replaceBefore(delimiter, replacement, [defaultValue])
DateTime extensions
.isToday
.isYesterday
.isTomorrow
.date
.isSameDay(dateTime)
.isAtSameYearAs(dateTime)
.isAtSameMonthAs(dateTime)
.isAtSameDayAs(dateTime)
.isAtSameHourAs(dateTime)
.isAtSameMinuteAs(dateTime)
.isAtSameSecondAs(dateTime)
.copyWith(year, month, day, hour, minute, second, millisecond, microsecond)
.min(dateTime)
.max(dateTime)
.differenceInDays(dateTime)
.differenceInHours(dateTime)
.differenceInMinutes(dateTime)
.differenceInSeconds(dateTime)