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Optimistic vs. Pessimistic locking
...essential that the data is accurately read, with no un-shown changes - the extra locking overhead is worth it.
Oh, and Microsoft SQL server defaults to page locking - basically the row you're reading and a few either side. Row locking is more accurate but much slower. It's often worth setting your...
Python unittest - opposite of assertRaises?
...the correct solution in fact. The solution proposed by user9876 is conceptually flawed: if you test for the non-raising of say ValueError, but ValueError is instead raised, your test must exit with a failure condition, not an error one. On the other hand, if in running the same code you would raise ...
How to sort two lists (which reference each other) in the exact same way
...s problem is to use the "decorate, sort, undecorate" idiom, which is especially simple using python's built-in zip function:
>>> list1 = [3,2,4,1, 1]
>>> list2 = ['three', 'two', 'four', 'one', 'one2']
>>> list1, list2 = zip(*sorted(zip(list1, list2)))
>>> list1
...
Why does sun.misc.Unsafe exist, and how can it be used in the real world?
...}, such as {@link
java.util.concurrent.atomic.AtomicLongArray}, require extra memory ordering
guarantees which are generally not needed in these algorithms and are also
expensive on most processors.
SoyLatte - java 6 for osx javadoc excerpt
/** Base class for sun.misc.Unsafe-based F...
Exporting functions from a DLL with dllexport
...ain C exports, use a C project not C++. C++ DLLs rely on name-mangling for all the C++isms (namespaces etc...). You can compile your code as C by going into your project settings under C/C++->Advanced, there is an option "Compile As" which corresponds to the compiler switches /TP and /TC.
If you ...
Rails 2.3-style plugins and deprecation warnings running task in Heroku
...
Yep, I realize that all the warnings came from my Heroku scripts and logs. I'll assume that (a) it's the plugin injections and (b) that the Heroku team will fix this before it becomes an actual problem.
– fearless_fool
...
WinDbg基础资料（日本語） - IT优秀资料 - 清泛网 - 专注C/C++及内核技术
...= CharSet.Unicode)]
public static extern int XXX_ProtectDocumentW(string lpszInputPath, string lpszOutputPath, int nProtectType,
ref XXX_SECURITY_OPTION_PSWD pModuleOption, ref XXX_PROTECT_OPTION pProtectOption);
解決手順：
1. 各モジュールのPDB付きのRe...
MYSQL import data from csv using LOAD DATA INFILE
...SET [CHARACTER SET charset_name]
FIELDS [{FIELDS | COLUMNS}[TERMINATED BY 'string']]
[LINES[TERMINATED BY 'string']]
[IGNORE number {LINES | ROWS}]
See this Example:
LOAD DATA LOCAL INFILE
'E:\\wamp\\tmp\\customer.csv' INTO TABLE `customer`
CHARACTER SET 'utf8'
FIELDS TERMINATED BY ',' ENCLOSED...
How do you write tests for the argparse portion of a python module? [closed]
...turn parser.parse_args(args)
Then in your main function you should just call it with:
parser = parse_args(sys.argv[1:])
(where the first element of sys.argv that represents the script name is removed to not send it as an additional switch during CLI operation.)
In your tests, you can then call...
How to avoid explicit 'self' in Python?
...s leads to useful properties, such as: you can't add members which accidentally shadow non-members and thereby break code.
One extreme example: you can write a class without any knowledge of what base classes it might have, and always know whether you are accessing a member or not:
class A(some_fu...