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How do MySQL indexes work?
I am really interested in how MySQL indexes work, more specifically, how can they return the data requested without scanning the entire table?
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What is a difference between
...ot fool the runtime type system. And this is so because arrays are what we call reifiable types. This means that at runtime Java knows that this array was actually instantiated as an array of integers which simply happens to be accessed through a reference of type Number[].
So, as you can see, one t...
Adding header for HttpURLConnection
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Why are they called "RequestProperty" when everyone calls them Headers??
– Philip Rego
Jun 21 '17 at 19:58
2
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Rename a file using Java
... an example about how could you handle the files in Linux environment. Basically, you need to use java.nio.file.Paths.get(somePath) instead of using one of the implementations you've mentioned
– maxivis
Dec 9 '15 at 15:57
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How do I convert between big-endian and little-endian values in C++?
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If you're using Visual C++ do the following: You include intrin.h and call the following functions:
For 16 bit numbers:
unsigned short _byteswap_ushort(unsigned short value);
For 32 bit numbers:
unsigned long _byteswap_ulong(unsigned long value);
For 64 bit numbers:
unsigned __int64 _by...
How do I prevent node.js from crashing? try-catch doesn't work
...ht exception occurs while you are handling an HTTP request, you must still call end() on the http.ServerResponse Object. However you implement this is up to you. If you do not do this, the request will hang until the browser gives up. If you have enough of these requests, the server can run out of m...
How can I clear event subscriptions in C#?
...list, effectively.
From outside the class, you can't do this - events basically expose "subscribe" and "unsubscribe" and that's it.
It's worth being aware of what field-like events are actually doing - they're creating a variable and an event at the same time. Within the class, you end up referenc...
“A project with an Output type of Class Library cannot be started directly”
...nd project, which is an executable which references the other project, and calls something in it.
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How to programmatically clear application data
...answer, the way of clearing all of an application's preferences programmatically would be
private void clearPreferences() {
try {
// clearing app data
Runtime runtime = Runtime.getRuntime();
runtime.exec("pm clear YOUR_APP_PACKAGE_GOES HERE");
} catch (Exception e) ...
fs: how do I locate a parent folder?
...ot quite right.
The point of path.join() is to eliminate the need for the caller to know which directory separator to use (making code platform agnostic).
Technically the correct answer would be something like:
var path = require("path");
fs.readFile(path.join(__dirname, '..', '..', 'foo.bar'));...