dart_extensions

Extensions for different types similar to kotlin

Available classes and their usage

Added class Pair like in other languages

Pair<int, String> pair = Pair();

Available method and their usage

listOf - To create list from Iterable repeat - Executes the given function action specified number of times.
run - Calls the specified function operation with this value as its receiver and returns its result.
let - Calls the specified function operation with this value as its argument and returns its result.
also - Calls the specified function operation with this value as its argument and returns this value.

String extensions

isNullOrEmpty - Returns true if this nullable char sequence is either null or empty.
isNotNullOrEmpty - Returns false if this nullable char sequence is either null or empty.
reversed - Returns a progression that goes over the same range in the opposite direction with the same step.
toInt - Returns the value of this number as an int.
toIntOrNull - Returns the value of this number as an int or null if can not be parsed.
toDouble - Returns the value of this number as an double.
toDoubleOrNull - Returns the value of this number as an double or null if can not be parsed.
toBoolean - Returns true if 'this' is "true", otherwise - false.
replaceAfter - Replaces part of string after the first occurrence of given delimiter with the replacement string.
replaceBefore - Replaces part of string before the first occurrence of given delimiter with the replacement string.
anyChar - Returns true if at least one element matches the given predicate.
containsIgnoreCase - Returns true if string contains another without matching case.

Bool extension

not - Returns the inverse of this boolean.
and - Logical and.
or - Logical or.
xor - Logical xor.

Iterable extensions

isNullOrEmpty - Returns true if this nullable iterable is either null or empty.
isNotNullOrEmpty - Returns false if this nullable iterable is either null or empty.
any - Returns true if at least one element matches the given predicate.
toSet - Convert iterable to set.
intersect - Returns a set containing all elements that are contained by both this set and the specified collection.
subtract - Returns a set containing all elements that are contained by this collection and not contained by the specified collection.
union - Returns a set containing all distinct elements from both collections.
countWhere - Returns count of elements that matches the given predicate.
distinctBy - Returns a list containing only elements from the given collection having distinct keys returned by the given selector function.
forEachIndexed - Performs the given action on each element on iterable, providing sequential index with the element.
groupBy - Groups elements of the original collection by the key returned by the given function applied to each element and returns a map where each group key is associated with a list of corresponding elements.
filter - Returns a list containing only elements matching the given predicate.
filterNot - Returns a list containing all elements not matching the given predicate.
filterNotNull - Returns a list containing all elements that are not null.
take - Returns a list containing first n elements.
firstOrNull - Returns first element or null otherwise.
firstWhereOrNull - Returns first element by given predicate or null otherwise.

Libraries

dart_extension_methods