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What is the difference between Θ(n) and O(n)?
...I see Θ(n) with the strange Θ symbol with something in the middle of it, and sometimes just O(n). Is it just laziness of typing because nobody knows how to type this symbol, or does it mean something different?
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JavaScript function in href vs. onclick
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The typical path these days is to use a javascript library (eg. jquery) and create an event handler using that library. It would look something like:
$('a').click( function(e) {e.preventDefault(); /*your_code_here;*/ return false; } );
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“Application tried to present modally an active controller”?
...e my concern! What I did was to add a dummy UIViewController to the tabbar and present modally the actual view controller subclass instance.
– Javier Soto
Sep 25 '11 at 18:00
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Branch descriptions in Git
...ig_name;
const char *value;
};
--edit-description::
Open an editor and edit the text to explain what the branch is for, to be used by various other commands (e.g. request-pull).
Note that it won't work for a detached HEAD branch.
That description is used by the script request-pull: see co...
Best way to test exceptions with Assert to ensure they will be thrown
...that expects the exact exception, does an Assert.Fail if the code succeeds and also catches generic exceptions to make sure that a different exception is not thrown.
First case:
[TestMethod]
[ExpectedException(typeof(ArgumentNullException))]
public void MethodTest()
{
var obj = new ClassRequi...
Haskell composition (.) vs F#'s pipe forward operator (|>)
...ell I've only ever seen function composition, (.) , being used. I understand that they are related , but is there a language reason that pipe-forward isn't used in Haskell or is it something else?
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Any way to properly pretty-print ordered dictionaries?
I like the pprint module in Python. I use it a lot for testing and debugging. I frequently use the width option to make sure the output fits nicely within my terminal window.
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How to clear APC cache entries?
...on apc_clear_cache.
Calling apc_clear_cache() will clear the system cache and calling apc_clear_cache('user') will clear the user cache.
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How do I find the absolute url of an action in ASP.NET MVC?
...r is the better one, this way Resharper can still validate that the Action and Controller exists. I would suggest the use of Request.Url.Scheme instead of the http, that way http and https are both supported.
– Pbirkoff
Mar 16 '12 at 10:25
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Rails 4: List of available datatypes
...t, 2016-Sep-19:
There's a lot more postgres specific datatypes in Rails 4 and even more in Rails 5.
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