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What is the relationship between Looper, Handler and MessageQueue in Android?
...is a utility class that facilitates interacting with a Looper—mainly by posting messages and Runnable objects to the thread's MessageQueue. When a Handler is created, it is bound to a specific Looper (and associated thread and message queue).
In typical usage, you create and start a HandlerThread...
How to differ sessions in browser-tabs?
...ab has his own Id.
Data stored using sessionStorage do not persist across browser tabs,
even if two tabs both contain webpages from the same domain origin. In
other words, data inside sessionStorage is confined to not just the
domain and directory of the invoking page, but the browser tab...
Do HTML WebSockets maintain an open connection for each client? Does this scale?
...d how many open WebSocket connections a server can handle. Maybe leaving those connections open isn't a problem in reality, but it feels like it is.
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Custom toast on Android: a simple example
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really anybody could explain purpose of findViewById(R.id.toast_layout_root)? it's gonna be null anyway, and it works perfectly well with just passing null
– sergey.n
Oct 2 '17 at 17:36
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How does the main() method work in C?
...ignatures for main, as well as variable-length argument lists, is one of those features.
Programmers noticed that they can pass extra arguments to a function, and nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling function cleans...
How to gracefully handle the SIGKILL signal in Java
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It is impossible for any program, in any language, to handle a SIGKILL. This is so it is always possible to terminate a program, even if the program is buggy or malicious. But SIGKILL is not the only means for terminating a program. ...
The difference between fork(), vfork(), exec() and clone()
... it true that fork() calls clone() internally?
– gronostaj
Apr 5 '14 at 14:32
24
vfork avoids the...
How to request Administrator access inside a batch file
... to run from their Vista machines with UAC. The file is re-writing their hosts file, so it needs to be run with Administrator permissions. I need to be able to send them an email with a link to the .bat file. The desired behavior is that when they right-click on the file and say Open, they will g...
What characters are forbidden in Windows and Linux directory names?
..." ? and others are forbidden, but there are a infinite number of names composed only of valid characters that are forbidden. For example, spaces and dots are valid filename characters, but names composed only of those characters are forbidden.
Windows does not distinguish between upper-case and low...
What's the difference between Perl's backticks, system, and exec?
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For the record, backticks and qx[] also populate $? (the OS return value).
– jjohn
Nov 1 '13 at 16:58
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