大约有 45,000 项符合查询结果（耗时：0.0503秒） [XML]
Catching multiple exception types in one catch block
..., you can catch AError and BError in the same block (it is somewhat easier if you are the one defining the exceptions). Even given that there are exceptions you want to "fall through", you should still be able to define a hierarchy to match your needs.
abstract class MyExceptions extends Exception ...
Uppercase or lowercase doctype?
...>
In XML serializations (i.e. XHTML) the DOCTYPE is not required, but if you use it, DOCTYPE should be uppercase:
<!DOCTYPE html>
See The XML serialization of HTML5, aka ‘XHTML5’:
Note that if you don’t uppercase DOCTYPE in an XHTML document, the XML parser will return a synt...
Sometimes adding a WCF Service Reference generates an empty reference.cs
... the time it's because I've got a type name conflict it couldn't resolve.
If you right-click on your service reference and click configure and uncheck "Reuse Types in Referenced Assemblies" it'll likely resolve the issue.
If you were using some aspect of this feature, you might need to make sure y...
Can't connect to MySQL server error 111 [closed]
...y means that your MySQL server is only listening the localhost interface.
If you have lines like this :
bind-address = 127.0.0.1
In your my.cnf configuration file, you should comment them (add a # at the beginning of the lines), and restart MySQL.
sudo service mysql restart
Of course, to do t...
How do HTML parses work if they're not using regexp?
...
Usually by using a tokeniser. The draft HTML5 specification has an extensive algorithm for handling "real world HTML".
share
|
improve this answer
|
...
Cleaning up old remote git branches
I work from two different computers (A and B) and store a common git remote in the dropbox directory.
9 Answers
...
Is it necessary to write HEAD, BODY and HTML tags?
...estrictions are largely technical and won't ordinarily affect you. So yes, if it matters to your page whether a comment node or white space appears just before the head element or just inside it, (the page's JS could depend on it) then you must explicitly identify the head start tag to make that rel...
Call an activity method from a fragment
...ctivity to fragment:
FragmentManager fm = getSupportFragmentManager();
//if you added fragment via layout xml
YourFragmentClass fragment = (YourFragmentClass)fm.findFragmentById(R.id.your_fragment_id);
fragment.yourPublicMethod();
If you added fragment via code and used a tag string when you add...
What does the star operator mean, in a function call?
... to accept any number of positional and/or named arguments that aren't specifically named in the declaration.
Example:
def sum(*values):
s = 0
for v in values:
s = s + v
return s
s = sum(1, 2, 3, 4, 5)
or with **:
def get_a(**values):
return values['a']
s = get_a(a=1, ...
Replace part of a string with another string
...m, const std::string& to) {
size_t start_pos = str.find(from);
if(start_pos == std::string::npos)
return false;
str.replace(start_pos, from.length(), to);
return true;
}
std::string string("hello $name");
replace(string, "$name", "Somename");
In response to a comment...