大约有 40,000 项符合查询结果（耗时：0.0579秒） [XML]
How can I solve a connection pool problem between ASP.NET and SQL Server?
...ey remain blocked until the .NET garbage collector closes them for you by calling their Finalize() method.
You want to make sure that you are really closing the connection. For example the following code will cause a connection leak, if the code between .Open and Close throws an exception:
var conn...
How can I get the button that caused the submit from the form submit event?
...document.activeElement);
if (
/* there is an activeElement at all */
$btn.length &&
/* it's a child of the form */
$form.has($btn) &&
/* it's really a submit element */
$btn.is('button[type="submit"], input[type="submit"], input...
How to run a class from Jar which is not the Main-Class in its Manifest file
...
And if you want all jars in current directory on classpath too (eg. running Main class from lib directory) you can use java -cp "./*" com.mycomp.myproj.AnotherClassWithMainMethod Note the double quotes around ./* preventing unix machines fro...
How do I specify new lines on Python, when writing on files?
...
It depends on how correct you want to be. \n will usually do the job. If you really want to get it right, you look up the newline character in the os package. (It's actually called linesep.)
Note: when writing to files using the Python API, do not use the os.linesep. Just use ...
Definition of “downstream” and “upstream”
...ry. Information flowed "downstream" to you.
When you make changes, you usually want to send them back "upstream" so they make it into that repository so that everyone pulling from the same source is working with all the same changes. This is mostly a social issue of how everyone can coordinate thei...
Begin, Rescue and Ensure in Ruby?
...
Yes, ensure ensures that the code is always evaluated. That's why it's called ensure. So, it is equivalent to Java's and C#'s finally.
The general flow of begin/rescue/else/ensure/end looks like this:
begin
# something which might raise an exception
rescue SomeExceptionClass => some_variab...
How to convert index of a pandas dataframe into a column?
...vel) and creates an int index from 0 to len(df)-1
– BallpointBen
Jan 10 '19 at 19:52
2
Assignment...
When should I use mmap for file access?
...rovide at least two ways of accessing files. There's the standard system calls open() , read() , write() , and friends, but there's also the option of using mmap() to map the file into virtual memory.
...
How does the Amazon Recommendation feature work?
...nce. Typical fields of study revolve around market basket analysis (also called affinity analysis) which is a subset of the field of data mining. Typical components in such a system include identification of primary driver items and the identification of affinity items (accessory upsell, cross sel...
Python: How would you save a simple settings/config file?
...) as f:
sample_config = f.read()
config = ConfigParser.RawConfigParser(allow_no_value=True)
config.readfp(io.BytesIO(sample_config))
# List all contents
print("List all contents")
for section in config.sections():
print("Section: %s" % section)
for options in config.options(section):
...