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Why can't I use switch statement on a String?
...the hash code of the label. The corresponding case is an if statement that tests string equality; if there are collisions on the hash, the test is a cascading if-else-if. The second switch mirrors that in the original source code, but substitutes the case labels with their corresponding positions. T...
How to check command line parameter in “.bat” file?
...
if "%1"=="" goto :done
echo %1
shift
goto :loop
:done
echo Done.
Let's test it:
C:\> argq bla bla
bla
bla
Done.
Seems to work. But now, lets switch to second gear:
C:\> argq "bla bla"
bla""=="" was unexpected at this time.
Boom This didn't evaluate to true, neither did it evaluate to...
Show pending migrations in rails
...ere is an example of the output after having just generated and not run a 'test' migration
rails_project theIV$ rake db:abort_if_pending_migrations
(in /Users/theIV/Sites/rails_project/)
You have 1 pending migrations:
20090828200602 Test
Run "rake db:migrate" to update your database then try agai...
What is the exact meaning of IFS=$'\n'?
...
ANSI C-quoted strings is a key point. Thanks to @mklement0 .
You can test ANSI C-quoted strings with command od.
echo -n $'\n' | od -c
echo -n '\n' | od -c
echo -n $"\n" | od -c
echo -n "\n" | od -c
Outputs:
0000000 \n
0000001
0000000 \ n
0000002
0000000 \ n
0000002
000...
Deleting folders in python recursively
... os.chmod(name, stat.S_IWRITE)
os.remove(name)
if os.path.exists("test/qt_env"):
shutil.rmtree('test/qt_env',onerror=del_evenReadonly)
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What are the differences between Autotools, Cmake and Scons?
... ARCANE m4 macro syntax combined with verbose, twisted shell scripting for tests for "compatibility", etc.
If you're not paying attention, you will mess up cross-compilation ability (It
should clearly be noted that Nokia came up with Scratchbox/Scratchbox2 to side-step highly broken Autotools build ...
mysql -> insert into tbl (select from another table) and some default values [duplicate]
... '1', citydb.city_name, NULL, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP) select test.cities.city as city_name from test.cities as citydb; i am using this query it give me error can any one help me to solve this error?
– Chintan Mathukiya
Apr 7 at 12:57
...
Unmangling the result of std::type_info::name
...tr_base;
}
It prints:
Type of ptr_base: Base*
Type of pointee: Derived
Tested with g++ 4.7.2, g++ 4.9.0 20140302 (experimental), clang++ 3.4 (trunk 184647), clang 3.5 (trunk 202594) on Linux 64 bit and g++ 4.7.2 (Mingw32, Win32 XP SP2).
If you cannot use C++11 features, here is how it can be do...
Sample settings.xml for maven
... local
| environment.
|
| For example, if you have an integration testing plugin - like cactus -
| that needs to know where your Tomcat instance is installed, you can
| provide a variable here such that the variable is dereferenced during the
| build process to configure the cactus...
Compare if BigDecimal is greater than zero
...e. Every time I encounter an expression like this, I find myself writing a test to reassure myself that I've got it the right way around. Perhaps the fact that recently added classes, like LocalDate include isBefore is an indication that Oracle feel the same way. It's not ideal, but I think it's mar...