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Postgres unique constraint vs index
... master values (0, 0);
INSERT 0 1
test=# insert into master values (0, 1);
ERROR: duplicate key value violates unique constraint "master_con_id_key"
DETAIL: Key (con_id)=(0) already exists.
test=# insert into master values (1, 0);
ERROR: duplicate key value violates unique constraint "master_uniq...
CKEditor instance already exists
...elow is not a good solution as it is an internal API that can also produce errors, it is always better to use instance.destroy(true)
– Bala Clark
May 14 '12 at 12:43
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What do the different readystates in XMLHttpRequest mean, and how can I use them?
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Errors in the transfer still update readyState to 4. However, a completely interrupted transfer will reset readyState to 0. So, an error in the transfer that's a result of a redirect isn't really an "error" and you can choose...
Writing outputs to log file and console
... running the user script like log file name and path, redirect outputs and errors to log file, database connection details, etc ) which redirects all the outputs ( echo messages ) and errors to the log file from the executed script using the following code:
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Difference between 'struct' and 'typedef struct' in C++?
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If you just said:
struct Foo { ... };
Foo x;
you would get a compiler error, because Foo is only defined in the tag namespace.
You'd have to declare it as:
struct Foo x;
Any time you want to refer to a Foo, you'd always have to call it a struct Foo. This gets annoying fast, so you can add...
Nokogiri installation fails -libxml2 is missing
...:
sudo apt-get install libxslt-dev libxml2-dev
If you still receive the error, you may be missing a compiler toolchain:
sudo apt-get install build-essential
You'll get the "libxml2 is missing" error if you're missing a build toolchain (at least I ran into this issue on Debian Lenny).
The Noko...
How do you force Visual Studio to regenerate the .designer files for aspx/ascx files?
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Just wanted to say that I was having the same error and tried everything on this page, with nothing working. Turned out I was missing a ">" close tag on a div that had runat="server". Running VS-2008.
– Ber53rker
May 16 '12 at 14...
Running Bash commands in Python
...ss = subprocess.Popen(bashCommand.split(), stdout=subprocess.PIPE)
output, error = process.communicate()
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Eclipse - no Java (JRE) / (JDK) … no virtual machine
...ter - I have run it before with no problems, but now I keep getting this error:
34 Answers
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How do I copy an entire directory of files into an existing directory using Python?
...parameters for the root directory of the src tree;
it doesn't raise shutil.Error for errors at the root level of src;
in case of errors during copying of a subtree, it will raise shutil.Error for that subtree instead of trying to copy other subtrees and raising single combined shutil.Error.
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