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C++ equivalent of java's instanceof
...e of course).
As pointed out dynamic_cast doesn't come for free. A simple and consistently performing hack that handles most (but not all cases) is basically adding an enum representing all the possible types your class can have and check whether you got the right one.
if(old->getType() == BOX...
How can I find all of the distinct file extensions in a folder hierarchy?
On a Linux machine I would like to traverse a folder hierarchy and get a list of all of the distinct file extensions within it.
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cd into directory without having permission
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Enter super user mode, and cd into the directory that you are not permissioned to go into. Sudo requires administrator password.
sudo su
cd directory
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YAML Multi-Line Arrays
...['string1', 'string2', 'string3',
'string4', 'string5',
'string6']
and even have multi-line strings in single-line arrays:
key: ['string1', 'long
string', 'string3', 'string4', 'string5', 'string6']
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How do I create a message box with “Yes”, “No” choices and a DialogResult?
I want to make simple Yes/No choiced MessageBox, but I think it is nonsense to design a form for that. I thought I could use MessageBox, add buttons, etc. to accomplish this. It is simple, but since there is no DialogResult returned, how do I retrieve the result?
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PHP code to remove everything but numbers
...9]/', '', '604-619-5135');
preg_replace uses PCREs which generally start and end with a /.
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multiple tags
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Yes, absolutely. You can have multiple header, nav, and footer tags sans penalty.
As long as you're making sure you are using tags semantically and you aren't putting them in invalid places (they're block-level elements, so you can't put them inside an inline element, for exa...
How to Set Focus on Input Field using JQuery
... so used to it, when I see the space I automatically think "child element" and it takes a second to de-confuse myself. But hey, that's just me. It's cool that it works either way.
– simshaun
Jul 18 '11 at 20:19
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ORDER BY the IN value list
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@user80168 What if there are thousands values in IN clause? because I have got to do it for thousands records
– kamal
Oct 20 '16 at 10:35
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How to copy data to clipboard in C#
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There are two classes that lives in different assemblies and different namespaces.
WinForms: use following namespace declaration, make sure Main is marked with [STAThread] attribute:
using System.Windows.Forms;
WPF: use following namespace declaration
using System.Windows;
co...