大约有 34,900 项符合查询结果（耗时：0.0423秒） [XML]
How can I format a decimal to always show 2 decimal places?
...mal('3.214').quantize(TWOPLACES, context=Context(traps=[Inexact]))
Traceback (most recent call last):
...
Inexact: None
The next question reads
Q. Once I have valid two place inputs, how do I maintain that invariant throughout an application?
If you need the answer to that (along with lots of ...
IllegalArgumentException or NullPointerException for a null parameter? [closed]
...PointerException ? From the javadocs, both seem appropriate. Is there some kind of an understood standard? Or is this just one of those things that you should do whatever you prefer and both are really correct?
...
StringBuilder vs String concatenation in toString() in Java
...ver.
More importantly given we have only 3
properties it might not make a
difference, but at what point do you
switch from concat to builder?
At the point where you're concatenating in a loop - that's usually when the compiler can't substitute StringBuilder by itself.
...
Is there a way to run Python on Android?
We are working on an S60 version and this platform has a nice Python API..
23 Answers
...
MySQL case insensitive select
...? And if not, what query would I have to send so that I can do something like:
14 Answers
...
Swift - class method which must be overridden by subclass
Is there a standard way to make a "pure virtual function" in Swift, ie. one that must be overridden by every subclass, and which, if it is not, causes a compile time error?
...
What is the difference between JOIN and UNION?
...
UNION puts lines from queries after each other, while JOIN makes a cartesian product and subsets it -- completely different operations. Trivial example of UNION:
mysql> SELECT 23 AS bah
-> UNION
-> SELECT 45 AS bah;
+-----+
| bah |
+-----+
| 23 |
| 45 |
+-----+
2 ...
How to initialize a dict with keys from a list and empty value in Python?
I'd like to get from this:
6 Answers
6
...
Get first n characters of a string
...tring = substr($string,0,10).'...';
Update:
Based on suggestion for checking length (and also ensuring similar lengths on trimmed and untrimmed strings):
$string = (strlen($string) > 13) ? substr($string,0,10).'...' : $string;
So you will get a string of max 13 characters; either 13 (or les...
OpenSSL and error in reading openssl.conf file
... from the commandline you can type:
set OPENSSL_CONF=c:/libs/openssl-0.9.8k/openssl.cnf
to validate it you can type:
echo %OPENSSL_CONF%
You can also set it as part of the computer's environmental variables so all users and services have it available by default. See, for example, Environment v...