大约有 30,000 项符合查询结果（耗时：0.0420秒） [XML]
How to recursively delete an entire directory with PowerShell 2.0?
...this twice when run on a directory that contains subdirectories. The first time, there will be a lot of "The directory is not empty" errors. The second time, it completes with no errors.
– Kristopher Johnson
Dec 2 '11 at 20:03
...
How to debug PDO database queries?
... with prepared statements : if you have to execute the same query a lot of times, it'll only be sent to the DB and prepared once : for each execution, only the data will be sent.
– Pascal MARTIN
Mar 9 '10 at 18:06
...
Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
...ith different amounts of training data: randomly sample 20% of it, say, 10 times and observe performance on the validation data, then do the same with 40%, 60%, 80%. You should see both greater performance with more data, but also lower variance across the different random samples
To get a handle on...
Design patterns or best practices for shell scripts [closed]
...n. Be careful though, because if you do this, the program will abort every time you evaluate an undefined variable. For this reason, the only way to check if a variable is not defined is the following:
if test "x${foo:-notset}" == "xnotset"
then
echo "foo not set"
fi
You can declare variables...
Is it not possible to stringify an Error using JSON.stringify?
...
First time I've heard monkey patching :)
– Chris Prince
Jun 18 '16 at 17:27
2
...
How exactly does work?
...te. I was addressing the fact that the wrong answer wasn't selected at the time the question was asked. Perhaps you should police the folks spreading false assessments about the community improperly selecting answers, instead of folks trying to remind people that things change over time, and contex...
What are some popular naming conventions for Unit Tests? [closed]
... never heard the term PascalCase used, and I've been doing this for a long time. I only see the term PascalCase come up in Microsoft developer circles, is that what you do?
– Frank Szczerba
Jun 19 '09 at 19:02
...
What is `related_name` used for in Django?
...= models.ForeignKey(Material, related_name = 'frommaterial')
creation_time = models.DateTimeField(auto_now_add=True, blank=True)
quantity = models.DecimalField(max_digits=19, decimal_places=10)
So when you will have to access this data
you only can use related name
bom = material.toma...
Static variables in member functions
...side the program.
Any instance of A object will affect the same i and lifetime of i will remain through out the program. To add an example:
A o1, o2, o3;
o1.foo(); // i = 1
o2.foo(); // i = 2
o3.foo(); // i = 3
o1.foo(); // i = 4
...
How to find if a native DLL file is compiled as x64 or x86?
... 8664 machine (x64)
6 number of sections
4BBAB813 time date stamp Tue Apr 06 12:26:59 2010
0 file pointer to symbol table
0 number of symbols
F0 size of optional header
2022 characteristics
Executable...