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Why doesn't Objective-C support private methods?
...mplementor of a class would not want to use all of the Objective-C feature set in the implementation, and that means that dynamic dispatch must happen. However, there is no particular reason why private methods couldn't be dispatched by a special variant of objc_msgSend(), since the compiler would ...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...ayMp6FcvNucIpUndo1X8dKMv3Y26
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-----END PUBLIC KEY-----');
$rsa->setPublicKey();
echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);
The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_repl...
Is it expensive to use try-catch blocks even if an exception is never thrown?
...
try has almost no expense at all. Instead of doing the work of setting up the try at runtime, the code's metadata is structured at compile time such that when an exception is thrown, it now does a relatively expensive operation of walking up the stack and seeing if any try blocks exist t...
How to specify JVM maximum heap size “-Xmx” for running an application with “run” action in SBT?
...gives by default. I know in Java it's specified by "-Xmx" option. How do I set SBT up to use particular "-Xmx" value to run an application with "run" action?
...
Does JSON syntax allow duplicate keys in an object?
...though i like the mention of @PatrickGoley that on json.org it is called a set of key/value-pairs which implies uniqueness which would mean it is not valid.
– clamp
Feb 17 '14 at 16:02
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What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
...e page loading times. If the <script> tags have the defer attribute set you can't know in which order they'll be interpreted, so as described above this fixes that problem too.
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Create subdomains on the fly with .htaccess (PHP)
...riate data
The long version
1. Create a wildcard DNS entry
In your DNS settings you need to create a wildcard domain entry such as *.example.org. A wildcard entry looks like this:
*.example.org. 3600 A 127.0.0.1
2. Include the wildcard in vhost
Next up in the Apache configuration you nee...
MySQL indexes - what are the best practices?
...where column starts with "foo", and then need to scan that intermediate rowset to find the subset that contains "bar". SELECT ... WHERE column LIKE '%bar%' can't use the index. I hope you can see why.
Finally, you need to start thinking about indexes on more than one column. The concept is the s...
Difference between static memory allocation and dynamic memory allocation
...e" Do you mean allocation size is determined at compile time? Wouldn't the setting aside of memory only happen at runtime?
– lf215
Jul 27 '17 at 5:47
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How does Dijkstra's Algorithm and A-Star compare?
...ility function to find the vertex with minimum distance value, from
// the set of vertices not yet included in shortest path tree
int minDistance(int dist[], bool sptSet[])
{
// Initialize min value
int min = INT_MAX, min_index;
for (int v = 0; v < V; v++)
if (sptSet[v] == false &&...