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How do I check if a type is a subtype OR the type of an object?
...lue);
if (testInstance==null)
throw new InvalidCastException("HelperType must be derived from A");
_helperType = value;
}
}
}
I feel like I might be a bit naive here so any feedback would be welcome.
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How to change collation of database, table, column?
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You can run a php script.
<?php
$con = mysql_connect('localhost','user','password');
if(!$con) { echo "Cannot connect to the database ";die();}
mysql_select_db('db...
counting number of directories in a specific directory
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Nice! How would you do this $ ls -l .vim with PHP? Or how to get only the total, without the list. I mean, in this case get only 52?
– Pathros
Mar 8 '17 at 18:32
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C++ preprocessor __VA_ARGS__ number of arguments
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@Adam Because I cast {__VA_ARGS__} to int[], it is just int[], regardless of actual content of __VA_ARGS__
– qrdl
Jan 23 '10 at 20:45
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When should I use double instead of decimal?
...ecimal is causing bottlenecks or slow-downs. In those cases, I will "down cast" to double or float, but only do it internally, and carefully try to manage precision loss by limiting the number of significant digits in the mathematical operation being performed.
In general, if your value is transie...
Why am I seeing an “origin is not allowed by Access-Control-Allow-Origin” error here? [duplicate]
...ot the case you cannot use jsonp and you MUST rely on a server side proxy (PHP, ASP, etc.). There are plenty of guides related to this topic, just google it!
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MySQL offset infinite rows
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use php 'PHP_INT_MAX' to avoid overflow effects.
– Karl Adler
Apr 7 '14 at 15:11
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NGINX: upstream timed out (110: Connection timed out) while reading response header from upstream
...eam, client:xxxxxxxxxxxxxxxxxxxxxxxxx", upstream: "fastcgi://unix:/var/run/php/php5.6-fpm.sock", host: "xxxxxxxxxxxxxxx", referrer: "xxxxxxxxxxxxxxxxxxxx"
So i have to adjust the fastcgi_read_timeout in my server configuration
location ~ \.php$ {
fastcgi_read_timeout 240;
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}
See:...
What is array to pointer decay?
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const int a[] = { 2, 3, 5, 7, 11 };
into a pointer (which works without casting, and therefore can happen unexpectedly in some cases):
const int* p = a;
you lose the ability of the sizeof operator to count elements in the array:
assert( sizeof(p) != sizeof(a) ); // sizes are not equal
This...
Java Interfaces/Implementation naming convention [duplicate]
...Truck.
When you are using the Interface in place of a sub-class you just cast it to Truck. As in List<Truck>. Putting I in front is just Hungarian style notation tautology that adds nothing but more stuff to type to your code.
All modern Java IDE's mark Interfaces and Implementations and ...