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Create unique constraint with null columns
...rom favo_3col_uni_idx and your requirements are still enforced.
The index, now comprising the whole table, overlaps with the other one and gets bigger. Depending on typical queries and the percentage of NULL values, this may or may not be useful. In extreme situations it might even help to maintain ...
How to change users in TortoiseSVN
... didn't have a username/password, so I logged in with my credentials. We now have a username/password for him.
6 Answers
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If using maven, usually you put log4j.properties under java or resources?
...s>
</execution>
</executions>
</plugin>
Now the log4j.properties file will be right next to your JAR file, independently configurable.
To run your application directly from Eclipse, add the resources directory to your classpath in your run configuration: Run->R...
How to use C++ in Go
...cplusplus
}
#endif
(I use a void* instead of a C struct so the compiler knows the size of Foo)
The implementation is:
//cfoo.cpp
#include "foo.hpp"
#include "foo.h"
Foo FooInit()
{
cxxFoo * ret = new cxxFoo(1);
return (void*)ret;
}
void FooFree(Foo f)
{
cxxFoo * foo = (cxxFoo*)f;
delete ...
How to read a single char from the console in Java (as the user types it)?
...ter key required.) On UNIX systems, the 'stty' command can change modes.
Now, with respect to Java... see Non blocking console input in Python and Java. Excerpt:
If your program must be console based,
you have to switch your terminal out
of line mode into character mode, and
remember to...
Can I get JSON to load into an OrderedDict?
...ython-dev/2016-September/146327.html). This means that the json library is now order preserving by default. Observe the difference in behaviour between python 3.5 and 3.6. The code:
import json
data = json.loads('{"foo":1, "bar":2, "fiddle":{"bar":2, "foo":1}}')
print(json.dumps(data, indent=4))
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How many constructor arguments is too many?
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I know this as the "Named Parameter Idiom": parashift.com/c++-faq-lite/ctors.html#faq-10.18. Related: There is also the "Named Constructor Idiom": parashift.com/c++-faq-lite/ctors.html#faq-10.8
– Frank
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Is it safe to delete a void pointer?
...
No, of course not. It still says it's UB. Even more so, now it states it normatively that deleting void* is UB :)
– Johannes Schaub - litb
Jun 3 '09 at 16:52
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List all the modules that are part of a python package?
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@chrisleague I was using ur method with python 2.7, but now I need to move on with python 3.4, so you know that in python 3 pkutil.iter_modules yields (module_finder, name, ispkg) instead of (module_loader, name, ispkg). What can I do to make it work like the previous one ?
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Are HTML Image Maps still used?
...y moved to GitHub. Do we send people back to Google to find where it lives now? Or do we help them go from here? The Australia example is the same example it just lives somewhere different.
– David Newcomb
Apr 5 '16 at 1:26
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