useful_extensions

Description:

useful extensions

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);
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Bool extensions #
.not() #
if(email.isEmpty.not()){
checkEmailIsValid(email);
}
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.and() #
if(isEmailValid.and(isPasswordValid)){
register(email, password);
}
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.or() #
if(hasGoodMarks.or(hasBenefits)){
// Action()
}
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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]);
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Scope functions #
final String? nullableString = null;

nullableString?.let((it) {
// Do something if string isn't null
});
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final List<int> list = [1, 2, 3];

list.also((self) => print('List length ${self.length}'));
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Iterable extensions #
.elementAtOrNull() #
final List<int> numbers = [1, 2, 3, 4, 5];

numbers.elementAtOrNull(numbers.length) // null
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.find() #
final List<int> numbers = [1, 2, 3, 4, 5];

numbers.find((e) => e >= 3) // 3
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.getRandom() #
final List<int> numbers = [1, 2, 3, 4, 5];

numbers.getRandom() // returns number from 1 to 5
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.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();
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.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]);
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.filter() #
final List<Person> people = [Person('John', 14), Person('Max', 22)];

people.filter((e) => e.age > 18); // [Person('Max', 22)]
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.filterNot() #
final List<Person> people = [Person('John', 14), Person('Max', 22)];

people.filterNot((e) => e.age > 18); // [Person('John', 14)]
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.filterNotNull() #
final List<Person?> people = [Person('John', 14), null, Person('Max', 22)];

people.filterNotNull(); // [Person('John', 14), Person('Max', 22)]
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.forEachIndexed() #
final List<int> numbers = [1, 2, 3, 4, 5];

numbers.forEachIndexed((index, item) => print(index)});
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List extensions #
.plus() #
final List<int> numbers = [1, 2, 3];

numbers.plus(1); // [2, 3, 4]
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.minus() #
final List<int> numbers = [1, 2, 3];

numbers.minus(1); // [0, 1, 2]
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.multiply() #
final List<int> numbers = [1, 2, 3];

numbers.multiply(2); // [2, 4, 6]
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.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]
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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)

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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