darq 1.0.0-dev.1

The power of lazy-evaluated enumerables in your hands! (A port of functional LINQ from the .NET library.)

[1.0.0-dev.1]

• Null safety!
• The default named parameter of methods which take a default value are now marked as required (but can still be explicitly set to null if the generic type argument of the iterable is a nullable type). This affects the following methods: elementAtOrDefault, firstOrDefault, firstWhereOrDefault, lagSelect, lag, lastOrDefault, lastWhereOrDefault, leadSelect, lead, padEnd, padStart
• The fillBackward, fillForward, and fillMissing extensions have been reconfigured to only target iterables of nullable types
• EqualityComparer.forType has been refactored to return a default EqualityComparer when a patching comparer for the requested type was not found. The previous behavior has been converted into the new EqualityComaprer.tryForType method which instead returns null when a match is not found.
• • As a reminder, the default EqualityComparer has a comparer of (a, b) => a == b, a hasher of (a) => a.hashCode, and a sorter of (a, b) => 0
• Removed all calls to checkNullError and argument null checks as they are now redundant
• Fixed a misordering of the parameters in aggregateRight and tryAggregateRight that led to incorrect results in cases where the aggregation depended on concatenation (e.g. strings)

[0.5.1]

• Added identifiers to parameters for all function types to aid with IntelliSense (Issue #4)
• Tweaked various types' documentation for clarity
• Overrode toList on MemoizedIterable to return the cached list if the cache had already been filled
• sum, average converted to use generic type arguments instead of num. (@rodion-m)
• Fixed typo in grouping generic type parameters that was resulting in groups defaulting to Grouping<dynamic, dynamic> (Issue #3, @Miiite)

[0.5.0]

• Added a ton more extension methods, effectively quadrupling the number of methods added to Iterable (from 40 up to 160). Many of these methods were ported from the MoreLINQ library and modified to be more idiomatic to Dart.
• New methods:
  • aggregateRight
  • aggregateRightSelect
  • aggregateSelect
  • appendAll
  • assertAll
  • assertAny
  • assertCount
  • atLeast
  • atMost
  • awaitAll
  • awaitAny
  • batch
  • batchSelect
  • between
  • cartesian
  • cartesianSelect
  • compareCount
  • concatAll
  • consume
  • countBy
  • defaultRangeIfEmpty
  • endsWith
  • exclude
  • excludeAt
  • excludeRange
  • fillBackward
  • fillForward
  • fillMissing
  • flatten
  • index
  • insert
  • insertAll
  • insertOrAppend
  • interleave
  • interleaveAll
  • lag
  • lagSelect
  • lead
  • leadSelect
  • memoize
  • move
  • nonNull
  • padEnd
  • padStart
  • pairwise
  • partition
  • permutations
  • prependAll
  • preScan
  • randomSubset
  • repeat
  • scan
  • skipLast
  • split
  • startsWith
  • subsets
  • takeEvery
  • takeLast
  • toHashMap
  • toLinkedHashMap
  • toSplayTreeMap
  • toStream
• Added "try" variants of several methods which will return null or a default value upon a failed iteration rather than throwing an error.
  • tryAggregate
  • tryAggregateRight
  • tryInsert
  • tryInsertAll
  • trySingleOrDefault
  • trySingleWhereOrDefault
• Added "X" variants of several methods with more parameters to perform the same operation multiple times. (The "X" ranges from 2 to 9, representing the number of parameters in the method.)
  • appendX
  • cartesianX
  • cartesianSelectX
  • concatX
  • insertX
  • insertOrAppendX
  • ofTypeX
  • prependX
  • tryInsertX
• Breaking changes:
  • aggregate
    • Returns the same type as the source iterable. (Old functionality moved to aggregateSelect.)
  • segment
    • Renamed to batch
• New utility types:
  • TupleX
    • Members are accessed by itemX, where X is the zero-based index of the item to get in the tuple.
    • Members can also be accessed using an indexer with list-style notation.
    • Tuples also extend Iterable so the members can be iterated and the tuple also has access to all iterable methods.

[0.4.0+1]

• Fixing a bug in the documentation

[0.4.0]

• Enumerable and all related subclasses have been removed. The package has changed over to using static extension methods on Iterable.
  • Related, the trailing "E" in method names as well as the utility factory E have been removed.
• Enumerable factory constructors have been converted into standalone factory classes (if not made redundant by existing Iterable constructors).
  • Enumerable.empty -> Iterable.empty
  • Enumerable.from -> redundant
  • Enumerable.generate -> Iterable.generate
  • Enumerable.repeat -> RepeatIterator
• A new factory class has been created: RangeIterator
  • Generates an iterable whose elements represent a range of integral values.
• Some methods have been renamed so as to not conflict with existing Iterable methods of the same name.
  • join -> joinMap
• Some methods have had functionality tweaked so as to maintain a separate identity from existing Iterable methods.
  • select: Selector argument now requires (T element, int index) as the parameters.
  • selectMany: Selector argument now requires (T element, int index) as the parameters.
• Some methods have been removed as existing methods in Iterable make them fully redundant.
  • cast
  • elementAt
  • first
  • last
  • single
  • take
  • takeWhile
  • skip
  • skipWhile
  • toList
  • toSet
  • where
• A new method has been added: segment
  • Groups the iterable into segments of an indicated size. Can optionally include any partial chunks at the end of the iterable.
• Extension getters have also been added to String to facilitate easy conversion to Iterable<String>.
  • iterable: Returns an iterable of the characters in the string.
  • iterableRunes: Returns an iterable of the characters in the string while respecting rune boundaries.

[0.3.1]

• Typedefs have been converted from a shorthand form to the full form. This should help with some type inference issues.

[0.3.0]

• Unit tests have been added to ensure Iterable built-in functions behave as expected.
• Default reducers for methods where a comparator is optional (such as aggregatorE, sumE, and orderByE) have been extended to also support Duration and BigInt.
• Custom error types have been overhauled to utilize default Dart error types:
  • UnexpectedStateError, KeyExistsError, and IntegerOverflowError now extend StateError instead of Error.
  • ConversionError now extends CastError instead of Error.
  • IncompatibleTypeError now extends UnsupportedError instead of Error.
  • NullEnumerableError, EmptyEnumerableError, and ElementNotFoundError have been merged into EnumerableError which extends StateError.
  • OperationError has been removed. Code that threw OperationError now throws StateError with a descriptive message.
• Added subtype support for ValueEnumerable for specialized behavior when the source Iterable supports various actions. (Currently the only specialized subtype is ListIterator which enables short-circuiting for countE and elementAtE methods to call the list's length property and indexer, respectively.)
• Changed countE to call the underlying iterable's length property when condition is not specified. This should enable O(1) length calculations for default Dart collections that internally implement EfficientLengthIterable.
• Changed EqualityComparer to enable global setting of default comparers of new types. For example, for a custom type Foo, the static method EqualityComparer.addDefaultEqualityComparer<Foo>(comparer) will set the global default comparer for Foo to the passed comparer values. Following this call, all calls to LINQ methods that take an optional EqualityComparer<Foo> will default to using the previously registered comparer when a comparer is not specified.

Known Issues:

• joinE and groupJoinE have a problem with the type inference of the parameters, causing the types to default to dynamic. When calling these methods while specifying an EqualityComparer, it may be necessary to explicitly state the type parameters as well as the types of parameters in any closure functions to get type inference to work properly.

[0.2.0]

• The naming convention of the enumerable methods has been changed so that they are suffixed by the letter "e" (such as selectE, joinE, whereE). This is an attempt at a compromise between keeping the names of the methods consistent with their .NET origins while avoiding conflicts with existing Iterable methods.
• Added two new factory methods to Enumerable: fromString and generator. fromString converts a String into an Enumerable that iterates over each individual character, while generator allows an iterable to be created of the specified length using a given generator function.
• countIfE has been merged with countE so that countE now has a Condition as an optional parameter. If the Condition is provided, the behavior is identical to countIfE, and if not, the behavior is identical to the original countE.
• Fixed an issue where several of the enumerable methods were not asserting on required parameters.

[0.1.2]

• Addressing pub description warnings.

[0.1.1]

• Addressing pub formatting warnings and issues.

[0.1.0]

• Initial release.