大约有 224 项符合查询结果（耗时：0.0301秒） [XML]
Is it bad practice to make a setter return “this”?
... lots of nulls or default values, and it gets hard to know which value corresponds to what)
Several overloaded constructors (downside: gets unwieldy once you have more than a few)
Factory/static methods (downside: same as overloaded constructors - gets unwieldy once there is more than a few)
If yo...
In log4j, does checking isDebugEnabled before logging improve performance?
...g(someString);
But usually, as the application grows, changes many hands, esp novice developers, you could see
logger.debug(str1 + str2 + str3 + str4);
and the like.
Even if log level is set to ERROR or FATAL, the concatenation of strings do happen !
If the application contains lots of DEBUG lev...
Why does sun.misc.Unsafe exist, and how can it be used in the real world?
...traction levels and numerous of checks. Failing the CAS is a bad in a loop esp. when the hardware decides to mispredict the branch (due to high contention) but having few more compare/branches just hurts. Park/Unpark are exposed through LockSupport not AQS (that latter is more of a lock impl. than ...
Is there a practical use for weak references? [duplicate]
...e quick&dirty caches via soft references but they are just unreliable, esp. w/o control over the GC and caches shall not be a driving force how to configure the GC.
– bestsss
Jan 16 '12 at 2:48
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Parsing JSON with Unix tools
...
On the basis that some of the recommendations here (esp in the comments) suggested the use of Python, I was disappointed not to find an example.
So, here's a one liner to get a single value from some JSON data. It assumes that you are piping the data in (from somewhere) and s...
JavaScript data grid for millions of rows [closed]
...
I have found SlickGrid to be the most appealing - especially if one works with jQuery. Congrats! (esp. for the great attitude and persistence.) :-)
– Andras Vass
Jul 26 '10 at 10:41
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Can I use assert on Android devices?
... at a package level, or at a class level which enables assertions at that respective level. The flag is off by default, as a result of which the assertion checks are skipped.
I wrote the following code in my sample Activity:
public class AssertActivity extends Activity {
@Override
protected v...
How do I protect Python code? [closed]
... your secrets and trying to protect against NSA-class reverse engineering. Esp if you have a big python code base and reasons to be paranoid. ;)
– Macke
Jan 8 '16 at 8:18
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What is the fastest way to compute sin and cos together?
...
.align 4,0x90
.globl _fsincos
_fsincos:
pushl %ebp
movl %esp, %ebp
fldl 12(%ebp)
fsincos
movl 8(%ebp), %eax
fstpl 8(%eax)
fstpl (%eax)
leave
ret $4
.subsections_via_symbols
Tada, it uses the fsincos instruction!
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SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)
...hing that was portable. I realize REPLACE INTO won't work with all cases, esp where PK preservation is needed, but will for many cases.
– Jacob Thomason
Dec 7 '12 at 5:22
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