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Convert char to int in C and C++
... code, you can write
char a = 'a';
int ia = (int)a;
/* note that the int cast is not necessary -- int ia = a would suffice */
to convert the character '0' -> 0, '1' -> 1, etc, you can write
char a = '4';
int ia = a - '0';
/* check here if ia is bounded by 0 and 9 */
Explanation:
a - '0'...
What are the best PHP input sanitizing functions?
... much more thorough job of both stripping out all HTML and also allowing a selective whitelist of tags and attributes through.
Modern PHP versions ship with the filter extension, which provides a comprehensive way to sanitize user input.
Validation
Making sure that submitted data is free from unexpe...
Generate class from database table
...eName'
declare @Result varchar(max) = 'public class ' + @TableName + '
{'
select @Result = @Result + '
public ' + ColumnType + NullableSign + ' ' + ColumnName + ' { get; set; }
'
from
(
select
replace(col.name, ' ', '_') ColumnName,
column_id ColumnId,
case typ.name...
Printing hexadecimal characters in C
...
My solution using a cast to unsigned char is one instruction smaller in gcc4.6 for x86-64...
– lvella
Nov 9 '11 at 15:20
...
How to convert an array to object in PHP?
...
In the simplest case, it's probably sufficient to "cast" the array as an object:
$object = (object) $array;
Another option would be to instantiate a standard class as a variable, and loop through your array while re-assigning the values:
$object = new stdClass();
foreach ...
How is std::function implemented?
...e one generic function, specialize it with each possible functor type, and cast them to a universal function pointer type. Therefore the type information is erased.
I've cobbled up a simplified version of that. Hope it'll help
#include <iostream>
#include <memory>
template <typenam...
Search for a string in Enum and return the Enum
...if the input is numeric; it just returns the parsed number, which then get cast to the enum's type. So if you want to check if some user input is a valid enum or something else, you should check for numeric content first. Since it returns a valid enum but with a value that may not exist at all in th...
Java Name Hiding: The Hard Way
...
You can cast a null to the type and then invoke the method on that (which will work, since the target object isn't involved in invocation of static methods).
((net.foo.X) null).doSomething();
This has the benefits of
being side-...
Convert ArrayList to String[] array [duplicate]
...ation as to what is going on here, the JVM doesn't know how to blindly downcast Object[] (the result of toArray()) to String[]. To let it know what your desired object type is, you can pass a typed array into toArray(). The typed array can be of any size (new String[1] is valid), but if it is too sm...
How do I print a double value with full precision using cout?
...
The iostreams way is kind of clunky. I prefer using boost::lexical_cast because it calculates the right precision for me. And it's fast, too.
#include <string>
#include <boost/lexical_cast.hpp>
using boost::lexical_cast;
using std::string;
double d = 3.14159265358979;
cout &l...