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Delegates in swift?
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It is not that different from obj-c.
First, you have to specify the protocol in your class declaration, like following:
class MyClass: NSUserNotificationCenterDelegate
The implementation will look like following:
// NSUse...
What is the most accurate way to retrieve a user's correct IP address in PHP?
...ode seems to be pretty complete already, I cannot see any possible bugs in it (aside from the usual IP caveats), I would change the validate_ip() function to rely on the filter extension though:
public function validate_ip($ip)
{
if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE ...
Create an array with same element repeated multiple times
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You can do it like this:
function fillArray(value, len) {
if (len == 0) return [];
var a = [value];
while (a.length * 2 <= len) a = a.concat(a);
if (a.length < len) a = a.concat(a.slice(0, len - a.length));
return a;
}
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Disable cache for some images
...ser no caching can be performed.
The random number generation can happen either on the server when serving the page (just make sure the page itself isn't cached...), or on the client (using JavaScript).
You will need to verify whether your web-server can cope with this trick.
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Try catch statements in C
.../catch blocks existent in another languages. Googled for a while this but with no result. From what I know, there is not such a thing as try/catch in C. However, is there a way to "simulate" them?
Sure, there is assert and other tricks but nothing like try/catch, that also catch the raised excepti...
“Application tried to present modally an active controller”?
I just came across a crash showing a NSInvalidArgumentException with this message on an app which wasn't doing this before.
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Converting many 'if else' statements to a cleaner approach [duplicate]
My code here detects if the mimeType is equals to some MIME type, if it is, it will do a certain conversion
7 Answers
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What is the difference between . (dot) and $ (dollar sign)?
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The $ operator is for avoiding parentheses. Anything appearing after it will take precedence over anything that comes before.
For example, let's say you've got a line that reads:
putStrLn (show (1 + 1))
If you want to get rid of those parentheses, any of the following lines would also do t...
Make JQuery UI Dialog automatically grow or shrink to fit its contents
...ng certain options on the form new options will appear in the form causing it to grow taller. This can lead to a scenario where the main page has a scrollbar and the JQuery UI dialog has a scrollbar. This two-scrollbar scenario is unsightly and confusing for the user.
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How do I parse a string with a decimal point to a double?
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if converting 12345678.12345678, it converts too 12345678.123457
– PUG
Dec 2 '11 at 16:18
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