LINQ to Objects is missing a few desirable features.

This project enhances LINQ to Objects with extra methods, in a manner which keeps to the spirit of LINQ.

MoreLINQ is available for download and installation as NuGet packages.

Documentation for the stable and beta releases can be found at morelinq.github.io.

To build MoreLINQ from sources, you will need:

• .NET Core 2.0 with SDK 2.1
• Mono 5.0 if building on other platforms than Windows

Then run either build.cmd if building on Windows or build.sh if building on macOS or a Linux distribution supported by .NET Core.

Some code in the project is generated using T4 templates. To regenerate the code from modified templates, run MoreLinq\tt.cmd (Windows) or MoreLinq/tt.sh depending on your platform.

Building the documentation is supported on Windows only and requires Sandcastle Help File Builder (SHFB). Executing builddocs.cmd generates the documentation in the docs/api directory. It can be browsed locally using any HTTP server of static files, like http-server.

Ensures that a source sequence of objects are all acquired successfully. If the acquisition of any one fails then those successfully acquired till that point are disposed

Applies a right-associative accumulator function over a sequence. This operator is the right-associative version of the Aggregate LINQ operator.

This method has 3 overloads.

Asserts that all elements of a sequence meet a given condition otherwise throws an object.

This method has 2 overloads.

Asserts that a source sequence contains a given count of elements.

This method has 2 overloads.

Determines whether or not the number of elements in the sequence is greater than or equal to the given integer.

Determines whether or not the number of elements in the sequence is lesser than or equal to the given integer.

Batches the source sequence into sized buckets.

This method has 2 overloads.

Returns the Cartesian product of two sequences by combining each element of the first set with each in the second and applying the user=define projection to the pair

Applies a function to each element of the source sequence and returns a new sequence of result elements for source elements where the function returns a couple (2-tuple) having a true as its first element and result as the second.

Compares two sequences and returns an integer that indicates whether the first sequence has fewer, the same or more elements than the second sequence.

Returns a sequence consisting of the head element and the given tail elements.

This method has 2 overloads.

Completely consumes the given sequence. This method uses immediate execution, and doesn't store any data during execution

Determines whether or not the number of elements in the sequence is between an inclusive range of minimum and maximum integers.

Applies a key-generating function to each element of a sequence and returns a sequence of unique keys and their number of occurrences in the original sequence.

This method has 2 overloads.

Provides a countdown counter for a given count of elements at the tail of the sequence where zero always represents the last element, one represents the second-last element, two represents the third-last element and so on.

Returns all distinct elements of the given source, where "distinctness" is determined via a projection and the default equality comparer for the projected type.

This method has 2 overloads.

Determines whether the end of the first sequence is equivalent to the second sequence.

This method has 2 overloads.

Returns a projection of tuples, where each tuple contains the N-th element from each of the argument sequences.

This method has 3 overloads.

Determines whether or not the number of elements in the sequence is equals to the given integer.

Returns the set of elements in the first sequence which aren't in the second sequence, according to a given key selector.

This method has 2 overloads.

Excludes elements from a sequence starting at a given index

Returns the elements of a sequence and falls back to another if the original sequence is empty.

Returns a sequence with each null reference or value in the source replaced with the following non-null reference or value in that sequence.

This method has 3 overloads.

Returns a sequence with each null reference or value in the source replaced with the previous non-null reference or value seen in that sequence.

This method has 3 overloads.

Flattens a sequence containing arbitrarily-nested sequences.

This method has 2 overloads.

Returns the result of applying a function to a sequence with 1 to 16 elements.

This method has 16 overloads.

Immediately executes the given action on each element in the source sequence.

This method has 2 overloads.

Returns a sequence containing the values resulting from invoking (in order) each function in the source sequence of functions.

This method has 4 overloads.

Performs a Full Group Join between the and sequences.

This method has 4 overloads.

Performs a full outer join between two sequences.

This method has 4 overloads.

Returns a sequence of values consecutively generated by a generator function

Returns a sequence of values based on indexes

Groups the adjacent elements of a sequence according to a specified key selector function.

This method has 4 overloads.

Incremental was redundant with Pairwise and so deprecated since version 2.1. It was eventually removed in version 3.0.

Returns a sequence of where the key is the zero-based index of the value in the source sequence.

This method has 2 overloads.

Inserts the elements of a sequence into another sequence at a specified index.

Interleaves the elements of two or more sequences into a single sequence, skipping sequences as they are consumed.

This method has 2 overloads.

Produces a projection of a sequence by evaluating pairs of elements separated by a negative offset.

This method has 2 overloads.

Produces a projection of a sequence by evaluating pairs of elements separated by a positive offset.

This method has 2 overloads.

Performs a left outer join between two sequences.

This method has 4 overloads.

Returns the maxima (maximal elements) of the given sequence, based on the given projection.

This method has 2 overloads.

Returns the minima (minimal elements) of the given sequence, based on the given projection.

This method has 2 overloads.

Returns a sequence with a range of elements in the source sequence moved to a new offset.

Produces a sequence from an action based on the dynamic generation of N nested loops who iteration counts are defined by

Sorts the elements of a sequence in a particular direction (ascending, descending) according to a key.

This method has 2 overloads.

Merges two ordered sequences into one. Where the elements equal in both sequences, the element from the first sequence is returned in the resulting sequence.

This method has 7 overloads.

Pads a sequence with default values if it is narrower (shorter in length) than a given width.

This method has 3 overloads.

Pads a sequence with default values in the beginning if it is narrower (shorter in length) than a given width.

This method has 3 overloads.

Returns a sequence resulting from applying a function to each element in the source sequence and its predecessor, with the exception of the first element which is only returned as the predecessor of the second element

Combines OrderBy (where element is key) and Take in a single operation.

Combines OrderBy and Take in a single operation.

Partitions a sequence by a predicate, or a grouping by Boolean keys or up to 3 sets of keys.

This method has 10 overloads.

Generates a sequence of lists that represent the permutations of the original sequence

Executes the given action on each element in the source sequence and yields it

Prepends a single value to a sequence

Performs a pre-scan (exclusive prefix sum) on a sequence of elements

Returns an infinite sequence of random integers using the standard .NET random number generator.

This method has 6 overloads.

Returns an infinite sequence of random double values between 0.0 and 1.0.

This method has 2 overloads.

Returns a sequence of a specified size of random elements from the original sequence.

This method has 2 overloads.

Ranks each item in the sequence in descending ordering using a default comparer.

This method has 2 overloads.

Ranks each item in the sequence in descending ordering by a specified key using a default comparer.

This method has 2 overloads.

Repeats the sequence indefinitely or a specific number of times.

This method has 2 overloads.

Performs a right outer join between two sequences.

This method has 4 overloads.

Run-length encodes a sequence by converting consecutive instances of the same element into a KeyValuePair<T, int> representing the item and its occurrence count.

This method has 2 overloads.

Peforms a scan (inclusive prefix sum) on a sequence of elements.

This method has 2 overloads.

Peforms a right-associative scan (inclusive prefix) on a sequence of elements. This operator is the right-associative version of the Scan operator.

This method has 2 overloads.

Divides a sequence into multiple sequences by using a segment detector based on the original sequence.

This method has 3 overloads.

Generates a sequence of integral numbers within the (inclusive) specified range.

This method has 2 overloads.

Bypasses a specified number of elements at the end of the sequence.

Skips items from the input sequence until the given predicate returns true when applied to the current source item; that item will be the last skipped

Extracts elements from a sequence at a particular zero-based starting index

Merges two or more sequences that are in a common order (either ascending or descending) into a single sequence that preserves that order.

This method has 2 overloads.

Splits the source sequence by a separator.

This method has 12 overloads.

Determines whether the beginning of the first sequence is equivalent to the second sequence.

This method has 2 overloads.

Returns a sequence of representing all of the subsets of any size that are part of the original sequence.

This method has 2 overloads.

Returns a sequence resulting from applying a function to each element in the source sequence with additional parameters indicating whether the element is the first and/or last of the sequence

Returns every N-th element of a source sequence

Returns a specified number of contiguous elements from the end of a sequence

Returns items from the input sequence until the given predicate returns true when applied to the current source item; that item will be the last returned

Performs a subsequent ordering of elements in a sequence in a particular direction (ascending, descending) according to a key.

This method has 2 overloads.

Creates an array from an IEnumerable where a function is used to determine the index at which an element will be placed in the array.

This method has 6 overloads.

Appends elements in the sequence as rows of a given object with a set of lambda expressions specifying which members (property or field) of each element in the sequence will supply the column values.

This method has 4 overloads.

Creates a delimited string from a sequence of values. The delimiter used depends on the current culture of the executing thread.

This method has 30 overloads.

Creates a dictionary from a sequence of key-value pair elements or tuples of 2.

This method has 4 overloads.

Returns a of the source items using the default equality comparer for the type.

This method has 2 overloads.

Creates a lookup from a sequence of key-value pair elements or tuples of 2.

This method has 4 overloads.

Transposes the rows of a sequence into columns.

Traverses a tree in a breadth-first fashion, starting at a root node and using a user-defined function to get the children at each node of the tree.

Traverses a tree in a depth-first fashion, starting at a root node and using a user-defined function to get the children at each node of the tree.

Traces the elements of a source sequence for diagnostics.

This method has 3 overloads.

Returns a sequence generated by applying a state to the generator function, and from its result, determines if the sequence should have a next element and its value, and the next state in the recursive call.

This method has 2 overloads.

Processes a sequence into a series of subsequences representing a windowed subset of the original

Returns a projection of tuples, where each tuple contains the N-th element from each of the argument sequences

Returns a projection of tuples, where each tuple contains the N-th element from each of the argument sequences.

This method has 3 overloads.

THESE METHODS ARE EXPERIMENTAL. THEY MAY BE UNSTABLE AND UNTESTED. THEY MAY BE REMOVED FROM A FUTURE MAJOR OR MINOR RELEASE AND POSSIBLY WITHOUT NOTICE. USE THEM AT YOUR OWN RISK. THE METHODS ARE PUBLISHED FOR FIELD EXPERIMENTATION TO SOLICIT FEEDBACK ON THEIR UTILITY AND DESIGN/IMPLEMENTATION DEFECTS.

Use of experimental methods requires importing the MoreLinq.Experimental namespace.

Creates a sequence query that streams the result of each task in the source sequence as it completes asynchronously.

This method has 2 overloads.

Creates a sequence that lazily caches the source as it is iterated for the first time, reusing the cache thereafter for future re-iterations. If the source is already cached or buffered then it is returned verbatim.