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Better way to cast object to int
...() — For converting an object of unknown type. It will use an explicit and implicit conversion or IConvertible implementation if any are defined.
as int? — Note the "?". The as operator is only for reference types, and so I used "?" to signify a Nullable<int>. The "as" operator works li...
How to pass arguments to addEventListener listener function?
... absolutely nothing wrong with the code you've written. Both some_function and someVar should be accessible, in case they were available in the context where anonymous
function() { some_function(someVar); }
was created.
Check if the alert gives you the value you've been looking for, be sure...
What is the purpose of “&&” in a shell command?
As far as I know, using & after the command is for running it in the background.
9 Answers
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What's the difference between Perl's backticks, system, and exec?
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exec
executes a command and never returns.
It's like a return statement in a function.
If the command is not found exec returns false.
It never returns true, because if the command is found it never returns at all.
There is also no point ...
Can't subtract offset-naive and offset-aware datetimes
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naive datetime objects are inherently ambiguous and therefore they should be avoided. It is easy to add tzinfo instead
– jfs
Sep 4 '14 at 9:39
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How do I trim a file extension from a String in Java?
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Handle with care: it'll throw an Exception at you if the file name has no suffix.
– Andreas Dolk
Jun 2 '09 at 22:44
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How to get the body's content of an iframe in Javascript?
...s just one line of native JavaScript.
For me it's the best, easy readable and even afaik the shortest way to get the iframes content.
First get your iframe
var iframe = document.getElementById('id_description_iframe');
// or
var iframe = document.querySelector('#id_description_iframe');
And th...
How do I decode HTML entities in Swift?
I am pulling a JSON file from a site and one of the strings received is:
23 Answers
23...
How to use NSCache
... into account:
// Your cache should have a lifetime beyond the method or handful of methods
// that use it. For example, you could make it a field of your application
// delegate, or of your view controller, or something like that. Up to you.
NSCache *myCache = ...;
NSAssert(myCache != nil, @"cache...
Alternatives to JavaScript
At the moment, the only fully supported language, and the de-facto standard for DOM tree manipulation in the browser is JavaScript. It looks like it has deep design issues that make it a minefield of bugs and security holes for the novice.
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