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What's the best way to send a signal to all members of a process group?
...se if the tree is the result of forking from a server start or a shell command line.) You can discover process groups using GNU ps as follows:
ps x -o "%p %r %y %x %c "
If it is a process group you want to kill, just use the kill(1) command but instead of giving it a process number, give it th...
How to vertically align an image inside a div
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The only (and the best cross-browser) way as I know is to use an inline-block helper with height: 100% and vertical-align: middle on both elements.
So there is a solution: http://jsfiddle.net/kizu/4RPFa/4570/
.frame {
height...
Get nested JSON object with GSON using retrofit
I'm consuming an API from my android app, and all the JSON responses are like this:
12 Answers
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How to use a wildcard in the classpath to add multiple jars? [duplicate]
...es in the directory named foo. A classpath entry consisting simply of * expands to a list of all the jar files in the current directory.
This should work in Java6, not sure about Java5
(If it seems it does not work as expected, try putting quotes. eg: "foo/*")
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How do I delete multiple rows in Entity Framework (without foreach)
...ng Entity Framework. There isn't a foreign key / parent object so I can't handle this with OnDeleteCascade.
22 Answers
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How to create a new (and empty!) “root” branch?
...answered Oct 24 '17 at 16:57
Mr_and_Mrs_DMr_and_Mrs_D
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Why does `True == False is False` evaluate to False? [duplicate]
...comparison, so
True == False is False
is equivalent to
(True == False) and (False is False)
This can be surprising in this case, but lets you write 1 <= x < 4 unlike in other languages like C.
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Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
...= new ArrayList<>();
// This is a clever way to create the iterator and call iterator.hasNext() like
// you would do in a while-loop. It would be the same as doing:
// Iterator<String> iterator = list.iterator();
// while (iterator.hasNext()) {
for (Iterator<String> iterat...
How to handle exceptions in a list comprehensions?
...amp;c in case of exceptions), so it's impossible, literally speaking, to "handle exceptions in a list comprehension" because a list comprehension is an expression containing other expression, nothing more (i.e., no statements, and only statements can catch/ignore/handle exceptions).
Function calls ...
Detect if Android device has Internet connection
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The best way to check if there is an active Internet connection is to try and connect
to a known server via http.
public static boolean hasActiveInternetConnection(Context context) {
if (isNetworkAvailable(context)) {
try {
HttpURLConnection urlc = (HttpURLConnection) (new...