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Check if Internet Connection Exists with Javascript? [duplicate]
...e, then the test won't reveal what it is supposed to right? It would just fetch it from the local memory and not go online to fetch it?
– Matt Welander
Jun 23 '15 at 15:30
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How to send only one UDP packet with netcat?
...ocalhost/8000
and avoid all the idiosyncrasies and incompatibilities of netcat.
This also works sending to other hosts, ex:
echo -n "hello" >/dev/udp/remotehost/8000
These are not "real" devices on the file system, but bash "special" aliases. There is additional information in the Bash Manu...
how to calculate binary search complexity
...is just formal mathematical lingo in order to be able to prove statements, etc. It has a very straightforward explanation. When n grows very large, the log n function will out-grow the time it takes to execute the function. The size of the "input set", n, is just the length of the list.
Simply put,...
@Transactional(propagation=Propagation.REQUIRED)
...behaviours adopted for Transaction management, such as REQUIRED, ISOLATION etc. you'll have to understand the basics of transaction management itself.
Read Trasaction management for more on explanation.
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Show or hide element in React
...en element might still have some lifecycle methods running - eg. it might fetch some data from the server after every update even tho it's not visible
the hidden element might crash the app if it'll receive incorrect data. It might happen as you can 'forget' about invisible nodes when updating the s...
C++ : why bool is 8 bits long?
...of addressing". For common processors, addressing a "byte" anyhow ends-up fetching more than a "byte" from external memory: this is due to efficiency reasons.
– jldupont
Jan 14 '10 at 14:34
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Detecting taps on attributed text in a UITextView in iOS
.../if ([attributes objectForKey:...)] //make a network call, load a cat Pic, etc
}
}
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What is object serialization?
... // machine, a database, an in memory array, etc.
new FileOutputStream(new File("o.ser")));
// do the magic
oos.writeObject( instance );
// close the writing.
oos.close();
}
}
When we run this progr...
Relation between CommonJS, AMD and RequireJS?
...sically, CommonJS specifies that you need to have a require() function to fetch dependencies, an exports variable to export module contents and a module identifier (which describes the location of the module in question in relation to this module) that is used to require the dependencies (source). C...
Change private static final field using Java reflection
... uses?
Has examples of messing with Integer's cache, mutating a String, etc
Caveats
Extreme care should be taken whenever you do something like this. It may not work because a SecurityManager may be present, but even if it doesn't, depending on usage pattern, it may or may not work.
JLS 17.5.3...