InfoQ Homepage LINQ Content on InfoQ
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Using ParseTree for LINQ-style queries and extracting metadata
Whether it's LISP macros or LINQ's expression trees - access to the AST of code is a powerful tool. We look at how ParseTree allows this in Ruby - and how it's being used in libraries like Ambition, Sequel and the web framework Merb.
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Get a Grasp on Expression Trees
Developers familiar with functional programming languages might not need an explanation as to why expression trees are useful. For the rest of us expression trees are the most striking concept of all the new features in C# 3.0 or VB 9.0.
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Up and Running with SQLite on .NET in 3 Minutes
SQLite is an open source database that has been growing in popularity. It's footprint is small and is used in a wide-variety of types of applications.
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InfoQ Interview: Jimmy Nilsson on LINQ to SQL
Floyd interviews Jimmy Nilsson on Microsoft's data access mechanism, LINQ to SQL.
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LINQ Grouping Techniques
For the most part LINQ works very much like SQL. Sources, joins, selects, and where clauses are all pretty standard fare. The Group/By/Into clause is where this breaks down. Unlike SQL, which always returns a rectangular dataset, LINQ is capable of returning hierarchical data. This brings new challenges of its own.
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Vendors Line Up Behind ADO.NET Entity Framework
Eight vendors have are planning to release drivers for ADO.NET Entity Framework within three months of RTM. IBM, MySQL AB, and a host for 3rd party vendors are targeting databases such as DB2, MySQL, and Oracle.
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Declarative, Imperative, and Task-based Parallelism in .NET
Daniel Moth has released four videos on Parallel Extensions for .NET. These cover the new declarative, imperative, and task-based parallelism APIs for the .NET framework.
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A Look inside LINQ
Writing LINQ Providers will become an essential skill for framework developers over the coming years. In the future all .NET libraries that expose a data store will be expected to have LINQ support, and with the recent release of .NET 3.5, the clock has started ticking.
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Post-VS 2008-Technology: LINQ to XSD and LINQ to Stored XML
Today, Shyam Pather, Principal Development Lead on the Data Programmability Team at Microsoft, is giving a presentation on LINQ to XML: Visual Studio 2008, Silverlight, and Beyond at the XML 2007 Conference in Boston. He talks about the current and future technologies surrounding LINQ to XML.
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PLINQ Has Been Released As Parallel Extensions
A community tech preview of Parallel Extensions, originally known as PLINQ, has been released. Parallel Extensions goes beyond what was found in PLINQ and will include imperative data parallel APIs.
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The Dark Side of Closures
Closures are not a new concept and in LINQ have proven to be incredibly useful. But they do have a dark side when used to break encapsulation. When two seemingly independent functions are tied together, unexpected results can occur.
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Abstracting Data Query in Ruby with Ambition Ambition
The .NET community is familiar with the general purpose query facilities added to the .NET Framework by the project LINQ. Ruby was missing such an abstraction layer. Chris Wanstrath brings his own solution: Ambition.
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Quaere: LINQ Arrives for Java
Anders Noras introduced the Quaere library, billed as LINQ for Java, last week at JavaZone. Quaere is a DSL providing query functionality against any structure implementing Iterable or its Queryable interface.
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More on Parallel LINQ
MSDN Magazine has spilled the beans on Parallel LINQ. Parallel LINQ, also known as PLINQ, is a set of LINQ extensions that hide the dirty work of distributing LINQ queries across multiple cores.
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LINQ Aggregates in VB and C#
An aggregate is a function that takes a collection of values and returns a scalar value. Examples from T-SQL include min, max, and sum. Both VB and C# have support for aggregates, but in very different ways.