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Match multiple cases classes in scala
...> "A"
case B(_) | C(_) => "B"
case _ => "default"
}
}
If you must, must, must extract the parameter and treat them in the same code block, you could:
def matcher(l: Foo): String = {
l match {
case A() => "A"
case bOrC @ (B(_) | C(_)) => {
val s = bOrC.asIn...
What is the difference between decodeURIComponent and decodeURI?
...ncoded also because they are regarded as text and not special characters.
Now back to the difference between the decode functions, each function decodes strings generated by its corresponding encode counterpart taking care of the semantics of the special characters and their handling.
...
mysqli or PDO - what are the pros and cons? [closed]
... the prepared statements, the fact that it becomes a standard, etc. But I know that most of the time, convincing somebody works better with a killer feature. So there it is:
A really nice thing with PDO is you can fetch the data, injecting it automatically in an object. If you don't want to use an ...
What does the variable $this mean in PHP?
... created by the interpreter for you, that contains an array of variables.
If you call $this inside a normal method in a normal class, $this returns the Object (the class) to which that method belongs.
It's possible for $this to be undefined if the context has no parent Object.
php.net has a b...
Split a string by a delimiter in python
...
I was wondering, what is the difference between the first example (simply using split()) and the second example (with a for loop)?
– EndenDragon
Jun 26 '16 at 18:21
...
How can I convert JSON to CSV?
...son.loads(x)
f = csv.writer(open("test.csv", "wb+"))
# Write CSV Header, If you dont need that, remove this line
f.writerow(["pk", "model", "codename", "name", "content_type"])
for x in x:
f.writerow([x["pk"],
x["model"],
x["fields"]["codename"],
...
How to dynamically update a ListView on Android [closed]
...ally, with android:id="@android:id/list". This allows the ListActivity to know which ListView we want to use in our declared layout.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.filterable_listvi...
OS X10.9 环境下部署 QT5.3.1 常见的编译问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...件中加入对应的SDK版本:
1
QMAKE_MAC_SDK = macosx10.9
3、:-1: error: [ui_mainwindow.h] Trace/BPT trap: 5
dyld: Library not loaded: /work/build/______________________________PADDING______________________________/lib/QtCore.framework/Versio...
How do you kill a Thread in Java?
... process inside the while{// open ext process} and that process is hanged, now neither the thread will be interrupted nor it will reach the end to check on your Boolean condition, and you are left hanging... try it with e.g launch a python console using java.exec and try getting the control back wit...
Get the current first responder without using a private API
... me that my app cannot be accepted because I'm using a non-public API; specifically, it says,
28 Answers
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