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Calculate a Running Total in SQL Server
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Update, if you are running SQL Server 2012 see: https://stackoverflow.com/a/10309947
The problem is that the SQL Server implementation of the Over clause is somewhat limited.
Oracle (and ANSI-SQL) allow you to do things like:
SELECT somedate, somevalue,
SUM(someval...
Can lambda functions be templated?
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Have a look at Boost.Phoenix for polymorphic lambdas: http://www.boost.org/doc/libs/1_44_0/libs/spirit/phoenix/doc/html/index.html
Does not require C++0x, by the way :)
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converting a .net Func to a .net Expression
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JB Evain from the Cecil Mono team is doing some progress to enable this
http://evain.net/blog/articles/2009/04/22/converting-delegates-to-expression-trees
Open files in 'rt' and 'wt' modes
...hese functions generally wrap the fopen function which is described here:
http://www.cplusplus.com/reference/cstdio/fopen/
As you can see it mentions the use of b to open the file in binary mode.
The document link you provided also makes reference to this b mode:
Appending 'b' is useful even on ...
Java switch statement multiple cases
...case
Default case
Default case
Default case
Second case
Second case
Src: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/switch.html
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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
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#!/bin/bash
# by Dennis Williamson
# 2010-10-06, revised 2010-11-10
# for http://stackoverflow.com/q/3869072
# designed to fit an 80 character terminal
dw=5 # description column width
w=6 # table column width
t () { printf '%-*s' "$w" " true"; }
f () { [[ $? == 1 ]] && printf '%-*s...
ROW_NUMBER() in MySQL
...n a WordPress Implementation. I needed ROW_NUMBER() and it wasn't there.
http://www.explodybits.com/2011/11/mysql-row-number/
The example in the article is using a single partition by field. To partition by additional fields you could do something like this:
SELECT @row_num := IF(@prev_value...
C# Set collection?
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I use Iesi.Collections http://www.codeproject.com/KB/recipes/sets.aspx
It's used in lot of OSS projects, I first came across it in NHibernate
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Repository Pattern vs DAL
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My personal opinion is that it is all about mapping, see: http://www.martinfowler.com/eaaCatalog/repository.html. So the output/input from the repository are domain objects, which on the DAL could be anything. For me that is an important addition/restriction, as you can add a reposi...
How to validate an email address using a regular expression?
... use.
One RFC 5322 compliant regex can be found at the top of the page at http://emailregex.com/ but uses the IP address pattern that is floating around the internet with a bug that allows 00 for any of the unsigned byte decimal values in a dot-delimited address, which is illegal. The rest of it a...