大约有 1,633 项符合查询结果（耗时：0.0289秒） [XML]
When and how should I use a ThreadLocal variable?
...bage collected.
You will end up with out of memory exceptions due to java.lang.OutOfMemoryError: PermGen space and after some googling will probably just increase -XX:MaxPermSize instead of fixing the bug.
If you do end up experiencing these problems, you can determine which thread and class is re...
How to initialize log4j properly?
...g classes. Resources are handled similarly. See the documentation for java.lang.ClassLoader for more details.
So, if you're having problems, try loading the class or resource yourself. If you can't find it, neither will log4j. ;)
See also:
Short introduction to log4j at Apache site
Apache: Loggin...
Are empty HTML5 data attributes valid?
....7 https://validator.w3.org/nu/#textarea :
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>a</title>
</head>
<body data-asdf>
</body>
</html>
On the other, HTML5 does not say in the specification of data- attri...
Android 4.3 Bluetooth Low Energy unstable
... 11-01 18:37:32.131: WARN/BluetoothGatt(20119): Unhandled exception: java.lang.NullPointerException)
– Lo-Tan
Nov 1 '13 at 22:52
2
...
Singletons vs. Application Context in Android?
...without the code 'Looper.prepare()',the system will report the error "java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()".
– sunhang
Jun 24 '14 at 5:48
...
What is Scala's yield?
...tes a new element into the resulting sequence.
Simple example (from scala-lang)
/** Turn command line arguments to uppercase */
object Main {
def main(args: Array[String]) {
val res = for (a <- args) yield a.toUpperCase
println("Arguments: " + res.toString)
}
}
The corresponding e...
Single huge .css file vs. multiple smaller specific .css files? [closed]
...'s unlikely you'd want to do without one.
http://lesscss.org
http://sass-lang.com
If you don't want to mess around with Ruby, this LESS compiler for Mac is great:
http://incident57.com/less/
Or you could use CodeKit (by the same guys):
http://incident57.com/codekit/
WinLess is a Windows GUI f...
What exactly do “u” and “r” string flags do, and what are raw string literals?
...= sys.getsizeof(r'cioa') == sys.getsizeof(u'cioa') (Ubuntu 16.04 with UTF8 lang). Similarly, type('cioa') == type(r'cioa') == type(u'cioa'). BUT, the raw string interpolation makes a difference, so sys.getsizeof('\ncioa') == sys.getsizeof(u'\ncioa') != sys.getsizeof(r'\ncioa')
...
Dynamically load JS inside JS [duplicate]
...
<!DOCTYPE html> <html lang="en"><head><meta charset="utf-8" /></head><body> <nav></nav> <template class="markdown"> == hello == </template> <te...
How to convert lazy sequence to non-lazy in Clojure
...sults to a file, and even after calling doall, the file contained "clojure.lang.LazySeq@address" instead of the contents of the sequence. Calling vec on value map returned got me what I needed to spit out to the file.
– Jesse Rosalia
Nov 23 '15 at 23:17
...