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Most efficient way to check for DBNull and then assign to a variable?
...sks again what OP wants to avoid. By writing row.IsNull(columnName) you're reading it once already and reading it again. Not saying that will make a difference, but theoretically it can be less efficient..
– nawfal
Feb 6 '13 at 16:31
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Is it possible to change icons in Visual Studio 2012?
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Look at this thread:
Solution Explorer - custom icons for my folders
I think it's also applicable for vs2012
If not -> you can manually find solution explorer's icon resources with ResHack (or Resource Hacker) and simply replace it!
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How to specify a multi-line shell variable?
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Use read with a heredoc as shown below:
read -d '' sql << EOF
select c1, c2 from foo
where c1='something'
EOF
echo "$sql"
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Portable way to get file size (in bytes) in shell?
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If I'm not mistaken, though, wc in a pipeline must read() the entire stream to count the bytes. The ls/awk solutions (and similar) use a system call to get the size, which should be linear time (versus O(size))
– jmtd
May 7 '11 at 16:40...
Storing Python dictionaries
...e third argument to pickle.dump, too. If the file doesn't need to be human-readable then it can speed things up a lot.
– Steve Jessop
Aug 18 '11 at 0:11
12
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Useless use of cat?
...equent single greps you learn the placement of the file argument and it is ready knowledge that the first is the pattern and the later ones are file names.
It was a conscious choice to use cat when I answered the question, partly because of a reason of "good taste" (in the words of Linus Torvalds) ...
MongoDB and “joins” [duplicate]
... as if they were a single table (you "join two tables into one").
You can read more about DBRef here:
http://docs.mongodb.org/manual/applications/database-references/
There are two possible solutions for resolving references. One is to do it manually, as you have almost described. Just save a docu...
Is there a difference between copy initialization and direct initialization?
... that when the copy constructor is explicit, then the first one will fail. Read 8.6/14
double b1 = 0.5;
double b2(0.5);
This is doing the same because it's a built-in type (this means not a class type here). Read 8.6/14.
A c1;
A c2 = A();
A c3(A());
This is not doing the same. The first defau...
Bash variable scope
...and while are in same subshell):
#!/bin/bash
cat /tmp/randomFile | (while read line
do
LINE="$LINE $line"
done && echo $LINE )
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Why can't strings be mutable in Java and .NET?
...no effort on your part.
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Immutable objects are inherently thread-safe; they require no synchronization. They cannot be corrupted by multiple threads
accessing them concurrently. This is far and away the easiest approach
to achieving thread safety. In fact, no thread can ever obser...