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How can I initialize base class member variables in derived class constructor?
...n you get this done? Like this:
class A
{
public:
A(int a, int b) : a_(a), b_(b) {};
int a_, b_;
};
class B : public A
{
public:
B() : A(0,0)
{
}
};
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How to handle WndProc messages in WPF?
...
WM_MOUSEWHEEL for example, the only way to reliably trap those messages was by adding the WndProc to a WPF window. This worked for me, whereas the official MouseWheelEventHandler simply didn't work as expected. I was unable t...
How to delete all rows from all tables in a SQL Server database?
...have any referential integrity set.
In that case, this will work:
EXEC sp_MSForEachTable 'DISABLE TRIGGER ALL ON ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'DELETE FROM ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'
GO
EXEC sp_M...
How to list variables declared in script in bash?
...t using temporary files: VARS="`set -o posix ; set`"; source script; SCRIPT_VARS="`grep -vFe "$VARS" <<<"$(set -o posix ; set)" | grep -v ^VARS=`"; unset VARS; . This will also output the vars in a ready-to-save format. The list will include the variables that the script changed (it depends...
Using Sinatra for larger projects via multiple files
...layout.haml
login.haml
main.haml
config.ru
root = ::File.dirname(__FILE__)
require ::File.join( root, 'app' )
run MyApp.new
app.rb
# encoding: utf-8
require 'sinatra'
require 'haml'
class MyApp < Sinatra::Application
enable :sessions
configure :production do
set :haml, {...
Does Go have “if x in” construct similar to Python?
...it, like this:
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
If you want to be able to check for membership without iterating over the whole list, you need to use a map instead of an a...
Reading an Excel file in PHP [closed]
...
You have 2 choices as far as I know:
Spreadsheet_Excel_Reader, which knows the Office 2003 binary format
PHPExcel, which knows both Office 2003 as well as Excel 2007 (XML). (Follow the link, and you'll see they upgraded this library to PHPSpreadSheet)
PHPExcel uses Sprea...
Rebase a single Git commit
... commits you don't want to include in the rebase.
git rebase -i <target_branch> where target_branch is the branch you want to rebase on to
Then you will edit the file that is opened and pick the commits you do want and drop (or d for short) all the commits you don't want to bring along.
...
Setting a property by reflection with a string value
...http://weblogs.asp.net/pjohnson/archive/2006/02/07/Convert.ChangeType-doesn_2700_t-handle-nullables.aspx
A wrapper was written a few years ago to handle this but that isn't perfect either.
http://weblogs.asp.net/pjohnson/archive/2006/02/07/Convert.ChangeType-doesn_2700_t-handle-nullables.aspx
...
How to atomically delete keys matching a pattern using Redis
In my Redis DB I have a number of prefix:<numeric_id> hashes.
23 Answers
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