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DROP IF EXISTS VS DROP?
...ent platforms might support it with different syntax, or not support it at all. In PostgreSQL, the syntax is
DROP TABLE IF EXISTS table_name;
The first one will throw an error if the table doesn't exist, or if other database objects depend on it. Most often, the other database objects will be fo...
How create table only using tag and Css
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Thank you! Someone who actually answered his question and not just say that "that's a dumb idea." I hate it when people don't answer the questions... If he asked it, it should be answered
– Brian Leishman
May 5 '1...
In a bootstrap responsive page how to center a div
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</div>
</div>
It's a simple example of a horizontally and vertically div centered in all screen sizes.
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Forcing a WPF tooltip to stay on the screen
...(after nearly 6 years years, sorry) as the correct answer because this actually works on all supported versions of Windows and keeps it open for 49 days, which should be long enough :p
– TimothyP
Mar 30 '15 at 9:12
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Why can't I call read() twice on an open file?
...ntents of a given file twice using the read() method. Strangely, when I call it the second time, it doesn't seem to return the file content as a string?
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Why Func instead of Predicate?
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Well, actually you have to place that in the context of the guideline, which is about writing a LINQ provider. So yeah, for LINQ operators, the guideline is to use Func<> and Expression<> as parameters for the extension met...
How do I update a Linq to SQL dbml file?
...y in the Properties pane of the DBML. This works for simple changes, like allowing nulls on a field.
The DBML designer is not installed by default in Visual Studio 2015, 2017 or 2019. You will have to close VS, start the VS installer and modify your installation. The LINQ to SQL tools is the feat...
I don't understand -Wl,-rpath -Wl,
...separated list of arguments to the linker. So
gcc -Wl,aaa,bbb,ccc
eventually becomes a linker call
ld aaa bbb ccc
In your case, you want to say "ld -rpath .", so you pass this to gcc as -Wl,-rpath,. Alternatively, you can specify repeat instances of -Wl:
gcc -Wl,aaa -Wl,bbb -Wl,ccc
Note tha...
Merging two images in C#/.NET
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basically i use this in one of our apps:
we want to overlay a playicon over a frame of a video:
Image playbutton;
try
{
playbutton = Image.FromFile(/*somekindofpath*/);
}
catch (Exception ex)
{
return;
}
Image frame;
try...
android on Text Change Listener
I have a situation, where there are two fields. field1 and field2 . All I want
to do is empty field2 when field1 is changed and vice versa. So at the end only
one field has content on it.
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