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How do PHP sessions work? (not “how are they used?”)
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Sessions in PHP are started by using the session_start( ) function. Like the setcookie( ) function, the session_start( ) function must come before any HTML, including blank lines, on the page. It will look like this:
<?php session_start( );...
Can I replace groups in Java regex?
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You could use Matcher#start(group) and Matcher#end(group) to build a generic replacement method:
public static String replaceGroup(String regex, String source, int groupToReplace, String replacement) {
return replaceGroup(regex, source, group...
How to make a SPA SEO crawlable?
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Before starting, please make sure you understand what google requires, particularly the use of pretty and ugly URLs. Now lets see the implementation:
Client Side
On the client side you only have a single html page which interact...
What is the best way to check for Internet connectivity using .NET?
... That's actually not so efficient. Using that makes my program start over 1 minute if there's no internet. Probably due to trying to resolve DNS. Pinging 8.8.8.8 (google dns) changed it to 3 seconds.
– MadBoy
Jun 14 '13 at 8:58
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Nginx 403 forbidden for all files
...force
To disable SELinux until next reboot:
# setenforce Permissive
Restart Nginx and see if the problem persists. To allow nginx to serve your www directory (make sure you turn SELinux back on before testing this. i.e, setenforce Enforcing)
# chcon -Rt httpd_sys_content_t /path/to/www
See m...
const char * const versus const char *?
...of C type declarations pretty much says: when reading a C type declaration start at the identifier and go right when you can and left when you can't.
This is best explained with a couple examples:
Example 1
Start at the identifier, we can't go right so we go left
const char* const foo
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Core pool size vs maximum pool size in ThreadPoolExecutor
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From this blog post:
Take this example. Starting thread pool size is 1, core pool size is
5, max pool size is 10 and the queue is 100.
As requests come in,
threads will be created up to 5 and then tasks will be added to the
queue until it reaches 100. When the queu...
Flask raises TemplateNotFound error even though template file exists
...ask(__name__, template_folder='../templates', static_folder='../static')
Starting with ../ moves one directory backwards and starts there.
Starting with ../../ moves two directories backwards and starts there (and so on...).
Hope this helps
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What is the difference between graph search and tree search?
...ur basic graph search algorithm looks something like the following. With a start node start, directed edges as successors and a goal specification used in the loop condition. open holds the nodes in memory, which are currently under consideration, the open list. Note that the following pseudo code i...
setImmediate vs. nextTick
...ion', () => {
it('deferredExecution', (done) => {
console.log('Start');
setTimeout(() => console.log('TO1'), 0);
setImmediate(() => console.log('IM1'));
process.nextTick(() => console.log('NT1'));
setImmediate(() => console.log('IM2'));
process.nextTick(()...