Code Review newsletter

Top new questions this week:

KISS my... unit of work

I've seen many, many UoW+Repository implementations. Whenever one was built on top of Entity Framework, I'd cringe at the added complexity. Sure the complexity buys you (sometimes) full decoupling …

c# design-patterns entity-framework repository

asked by Mat's Mug 22 votes answered by Ben Aaronson 14 votes

If she floats then she is not a witch like we thought

Continuing my C++ saga, this is the third project for my CS1 class: Buoyancy is the ability of an object to float. Archimedes' principle states that the buoyant force is equal to the weight of …

c++ beginner c++11 homework

asked by syb0rg 17 votes answered by Morwenn 20 votes

Count number of ways to paint a fence with N posts using K colors

A friend sent me this question, and I'd love somebody to review this and give his opinion. Write an algorithm that counts the number of ways you can paint a fence with N posts using K colors …

python algorithm combinatorics

asked by thomas 14 votes answered by Gareth Rees 16 votes

C++ function composition

What is a good way to compose std::function objects in C++? I tried the following, and it seems to work well: template<typename ... Fs> struct compose_impl { compose_impl(Fs&& ... …

c++ c++14 higher-order-functions

asked by davidhigh 12 votes answered by Morwenn 5 votes

Project Euler #1 in PHP

The code below works & as far as I can tell the result is correct. Would you please review and let me know what I could have done better? I tried to use variables as much as possible, that way it …

php beginner array programming-challenge

asked by Phrancis 11 votes answered by Brythan 2 votes

Counting the number of character occurrences

I've written some code that uses a SortedDictionary to count the number of occurrences of a character in a string. How can I improve this code? What should I be doing differently? Any advice at all …

c# beginner

asked by user9993 11 votes answered by Anna Lear 8 votes

"Who are you, and where do you live?" — a Q&A exercise

This is my first attempt at a programme. Is it good form? Does it follow best practice? Or am I completely off the mark? #include "stdafx.h" #include <iostream> #include <string> …

c++ beginner validation console io

asked by Barrie 11 votes answered by Edward 14 votes

Greatest hits from previous weeks:

Remove-Last-Comma-Problem

is there a more elegant way to solve this problem? List<String> paramList = new ArrayList<String>( ); paramList.add( "param1" ); paramList.add( "param2" ); StringBuilder result = new …

java strings

asked by Jonas 66 votes answered by Adeel Zafar Soomro 58 votes

What are the best practices with multithreading in C#?

For a while I have been interested in seeing if some tasks work well when split across multiple threads. On the one project I have been busy with I have been creating a lot of small utility apps, to …

c# .net multithreading

asked by JonathanPeel 23 votes answered by Eric Lippert 51 votes

Can you answer these?

Computing values with several large numeric vectors

I have several large numeric vectors (close to 1e6 entries each) and I need to make some computations with their values: iters=100 iters2=100 set.seed(91) sampleSubset<-sample(1:1e6, iters) mR12 …

performance r

asked by jpcgandre 2 votes

MySQL natural search and like search

I have written two queries for searching, but I want to simplify them as it seems needed. def searching(term: String): List[String] = { DB.withConnection { implicit c => var list = …

mysql mvc scala search

asked by Govind Singh Nagarkoti 2 votes

printf-like formatting for std::ostream ~ (not exactly) boost::format

cout << format( "%? %?!\n" // Hello world! "%1% %3% :)\n" // Hello again :) "%%05X: %05X\n" // %05X: 01234 "%%g: %g\n" // %g: 3.14159 "%%.3f: …

c++ strings c++11 stream

asked by firda 5 votes