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Building a complete online payment gateway like Paypal [closed]
...TTPS, VPN or dedicated line. Ultimately the authorisation request will be converted to X25 protocol, which is the protocol used by these acquiring banks when communicating with each other.
In summary then: it all depends on your region.
Contact a major bank and try to get through to their card a...
Best way to give a variable a default value (simulate Perl ||, ||= )
...
return true;
} else {
return false;
}
}
function select_defined(){
$l = func_num_args();
$a = func_get_args();
for ($i=0; $i<$l; $i++){
if ($a[$i]) return $a[$i];
}
}
Examples:
// $foo ||= $bar;
set_unless_defined($foo, $bar);
//$foo = $baz ||...
Escaping HTML strings with jQuery
...
what's the guidance on converting \n to <br>?
– amwinter
Oct 18 '13 at 8:02
2
...
How to reverse a string in Go?
... rune[i], rune[n-1-i] = rune[n-1-i], rune[i]
}
// Convert back to UTF-8.
output := string(rune)
fmt.Println(output)
}
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...
Is there a way to do repetitive tasks at intervals?
...(5 * time.Second)
quit := make(chan struct{})
go func() {
for {
select {
case <- ticker.C:
// do stuff
case <- quit:
ticker.Stop()
return
}
}
}()
You can stop the worker by closing the quit channel: close(quit).
...
How to redirect 404 errors to a page in ExpressJS?
...behave the same in your code but using res.json will do some magic in auto-converting objects to strings where .send() won't. Better safe than sorry. expressjs.com/api.html#res.json
– wgp
Dec 12 '14 at 18:54
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When do I need to use Begin / End Blocks and the Go keyword in SQL Server?
..., and IF statements, etc, where you need more then one step...
IF EXISTS (SELECT * FROM my_table WHERE id = @id)
BEGIN
INSERT INTO Log SELECT @id, 'deleted'
DELETE my_table WHERE id = @id
END
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What are all the different ways to create an object in Java?
...ambdas (essentially concise anonymous inner classes), which are implicitly converted to objects.
For completeness (and Paŭlo Ebermann), there's some syntax with the new keyword as well.
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im...
How to extract custom header value in Web API message handler?
... if (valueString != null)
{
return (T)Convert.ChangeType(valueString, typeof(T));
}
}
return toReturn;
}
}
Sample usage:
var myValue = response.GetFirstHeaderValueOrDefault<int>("MyValue");
...
How do I grep recursively?
...
@lorniper it makes the shell select all files and folders in your current directory, making in turn the grep apply to those files and (recursively because of the -R option) to the folders.
– VonC
Aug 4 '16 at 7:10
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