A lambda is an expression that acts as an anonymous function. Use this tag if you would like to discuss the appropriateness of a lambda or anonymous function in your code.
-1
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Converting LINQ query to lambda, having issues [closed]
Trying to convert a LINQ statement to a Lambda expression, but seem to be having trouble. Can't figure out where the issue is, but keep getting the same error message. Regular LINQ statement is below, ...
2
votes
1answer
76 views
Is there better way to shorten this Lambda expression's result selector?
I'm new in LINQ and Lambda expression. I'm not sure is there a way to shorten the result on this o.z.cust.cust.cust.bintAccountNo. As you can see below, the more ...
8
votes
1answer
176 views
EF6-Lambda Expressions deep big-tree query
I am looking to improve the following query.
We are using EF6 (CodeFirst) and C# Lambda Expressions, and Repository/Unit of Work patterns. Also, we needed to restrict the query in a way that we ...
4
votes
2answers
124 views
Platform independant thread pool v3
This is a continuation of this question, v4 can be found here
Taking the advise given previously, the deadlock was fixed in the non-yielding code. The next problem comes from the suggestion to make ...
1
vote
1answer
51 views
Refactor Oracle Entity Framework lambda query
I had a ugly problem and wrote an ugly query.
Query creates a cache that is used to get person id when I have {full_name, id_code?, birth_date?}. By question mark I mean that it is perfectly valid ...
3
votes
1answer
63 views
Exception handling with expression lambda in Presenter class
Following is a code snippet from MVP Win Forms application.
My DAL doesn't handle exceptions and it will be propagated up to the calling method in the presenter classes where the exception will be ...
2
votes
3answers
34 views
Boost::range::for_each + functor
I would like your comments on my code in C++ (C++98 + Boost)
I have written some code to use the functors with the boost::range::for_each algorithm.
My main ...
1
vote
2answers
62 views
Validate fields in Python dictionary using dictionary of lambdas
I would love some feedback on this. I use it to validate web-form objects before persisting them in the dangerously-lazy MongoDb. I have a class and many validators for each of my collections. Is ...
2
votes
1answer
29 views
2
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2answers
469 views
Sum(), ForEach() with Lambda in a hierarchical List Collection
I have to list the number of documents related to items in a hierarchical tree.
The specification states:
The tree will only ever be 2 levels deep.
The higher level items will list not only the ...
13
votes
1answer
199 views
Python Dictionary Black Magic
I am defining a subclass of a the python dictionary object mpCmd where every item is converted to a lambda. The intended usage is that every item in the dictionary ...
2
votes
2answers
87 views
Mixing Linq queries and Linq lambdas
I have been given a change to rewrite an old framework we use, and to implement the repository and unit of work patterns, but in an attempt to not rewriting all queries I have ended up with a weird ...
11
votes
6answers
917 views
Increment up the build number in AssemblyInfo.cs on every build
I just wrote this short little program to increment up the build number for my projects every time I build them.
After compiling this exe, I just call it in the pre-build command line.
I did take ...
17
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2answers
427 views
Dynamically call lambda based on stream input
Some context: I have code that looks like this (minor issue noted here):
...
13
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3answers
677 views
Effective use of multiple streams
I am experimenting with streams and lambdas in Java 8. This is my first serious foray using functional programming concepts; I'd like a critique on this code.
This code finds the Cartesian product of ...
10
votes
2answers
200 views
Basic Rock-Paper-Scissors implementation
So I decided to try to make a simple RPS implementation in Java 8, the following notes should be said first:
At a later point it should support RPSLS aswell, as any other Gesture-game variant.
At a ...
5
votes
2answers
65 views
Beta Reducer in Haskell
This is my first Haskell application, so any non-name-calling tips will be taken extremely well! It is just a beta reducer:
...
5
votes
1answer
63 views
Combining contents of files by reading them in a human ordering
This code review is inspired by the this StackOverflow question and written in Java 8.
The code is supposed to:
Order all files, with syntax jobXXX.script, where ...
3
votes
2answers
43 views
Elegant way of making a List of an attribute from a list of objects containing that attribute
If this is my class:
class Something
{
UUID id;
// Other members
}
Given a List<Something> things and I want to ...
4
votes
2answers
195 views
Project Euler “Largest product in a grid” (#11) in Java 8
I have come up with a Java 8 solution for the following problem:
In the 20×20 grid below, four numbers along a diagonal line have been marked in red (bold here).
08 02 22 97 38 15 00 40 00 75 ...
6
votes
1answer
2k views
A generic way to use LINQ to Entity with types and operations unknown until run time
A question was asked here about reflection and LINQ to entity. I'm trying to modify the code that was presented to fit my needs.
Here's what I am trying to accomplish: I'm writing back-end support ...
4
votes
1answer
107 views
Elixir pipes and anonymous functions
I recently got started with Elixir. I'm used to F#'s pipes, and Seq.map and LINQ's .Select statements. Things are different in ...
2
votes
2answers
116 views
Unwanted return values in lambda functions?
From a previous question, I got the idea of moving boilerplate code structures into a helper function and passing in a lambda function to it.
I then applied the idea to a data access class (code ...
3
votes
2answers
316 views
Removing hackery from pair of radix functions
I like the radix function and found a really neat way to compute its inverse in Python with a lambda and reduce() (so I really feel like I'm learning my cool ...
3
votes
2answers
856 views
C++11 factory pattern with lambdas
Anonymous functions are one of the best features of C++11. They make everything so beautiful!
However, one can get carried away and start overusing them.
This code calls a function that reads ...
1
vote
1answer
185 views
Excessive use of lambda with variant of Sieve of Eratosthenes?
This is a function which produces the sum of primes beneath (not including) a certain number (using a variant on the sieve of Eratosthenes).
...
6
votes
1answer
937 views
Fixed point combinator in C++1x
This has been tested and compiled under Visual Studio 2010. Are there any serious problems with this implementation?
PS. This implementation is fully lambda expression based. If I can make ...
