大约有 40,000 项符合查询结果（耗时：0.0543秒） [XML]
What does the construct x = x || y mean?
...it is often considered a bad programming practice, because it prevents you from passing a falsey value (which is not necessarily undefined or null) as a parameter. Consider following example:
function badFunction(/* boolean */flagA) {
flagA = flagA || true;
console.log("flagA is set to " + (fla...
Which is faster: while(1) or while(2)?
...? Or is this a clue that I'm reading generated code? Is it a bug resulting from an ill-advised find-and-replace-all, or a bad merge, or a cosmic ray? Maybe this line of code is supposed to do something dramatically different. Maybe it was supposed to read while(w) or while(x2). I'd better find the a...
How to document Python code with doxygen [closed]
...
Sphinx is mainly a tool for formatting docs written independently from the source code, as I understand it.
For generating API docs from Python docstrings, the leading tools are pdoc and pydoctor. Here's pydoctor's generated API docs for Twisted and Bazaar.
Of course, if you just want to ...
Can you list the keyword arguments a function receives?
...t required, so ignore them.
Then a function to tell what you are missing from your particular dict is:
def missingArgs(func, argdict):
return set(getRequiredArgs(func)).difference(argdict)
Similarly, to check for invalid args, use:
def invalidArgs(func, argdict):
args, varargs, varkw, ...
MySQL vs PostgreSQL for Web Applications [closed]
...8. That's nearly 11 years ago as of this edit. Software can change rapidly from version to version, so before you go choosing a DBMS based on the advice below, do some research to see if it's still accurate.
Check for newer answers below.
Better?
MySQL is much more commonly provided by web hosts...
How to check for a valid URL in Java?
... not work for malformed URLs such as http:/google.com. I used UrlValidator from Apache Commons.
– starf
May 27 '14 at 16:02
1
...
Is there any way in C# to override a class method with an extension method?
...n GetDesc();
}
}
What I noticed was that if I called a second method from inside an extension method, it would call the extension method that matched the signature even if there was a class method that also matched the signature. For example in the code above, when I call ExtFunc(), which in t...
Should I use @EJB or @Inject
... be incorrect or out of date. Please see comments for details.
I switched from @Inject to @EJB because @EJB allows circular injection whereas @Inject pukes on it.
Details: I needed @PostConstruct to call an @Asynchronous method but it would do so synchronously. The only way to make the asynchronou...
What is memory fragmentation?
...e memory back to the OS (because each of the large blocks it has allocated from the OS, for malloc etc. to sub-divide, has something left in it, even though most of each block is now unused).
Tactics to prevent memory fragmentation in C++ work by allocating objects from different areas according to ...
How do I set the offset for ScrollSpy in Bootstrap?
...d that this method is good, but that if I want to use it to set the offset from the beginning due to having different menu heights the $('body').data().scrollspy.options.offset (or the variant for version 3.0) isn't yet set. Is there something asynchronous about scrollspy that I'm missing?
...