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SQLite UPSERT / UPDATE OR INSERT
...ite to figure out what to do in case of a conflict. See:https://sqlite.org/lang_conflict.html.
Also note the sentence regarding delete triggers: When the REPLACE conflict resolution strategy deletes rows in order to satisfy a constraint, delete triggers fire if and only if recursive triggers are e...
When should an IllegalArgumentException be thrown?
... to throw a checked exception (although it makes an appearance in the java.lang.reflect code, where concern about ridiculous levels of checked-exception-throwing is not otherwise apparent).
I would use IllegalArgumentException to do last ditch defensive argument checking for common utilities (tryi...
How do I use disk caching in Picasso?
...
this is giving me this error: FATAL EXCEPTION: main java.lang.NoClassDefFoundError: com.squareup.okhttp.OkHttpClient
– CIRCLE
Mar 13 '15 at 14:22
...
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...