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Best explanation for languages without null
... that every reference type gets this extra state in its space that is typically undesired. A string variable could be any sequence of characters, or it could be this crazy extra null value that doesn't map into my problem domain. A Triangle object has three Points, which themselves have X and Y va...
When to use window.opener / window.parent / window.top
...
window.opener refers to the window that called window.open( ... ) to open the window from which it's called
window.parent refers to the parent of a window in a <frame> or <iframe>
window.top refers to the top-most window from a window nested in one or mo...
How to check if an object is a certain type
...ou can simply compare them using the Is operator.
So your code should actually be written like this:
Sub FillCategories(ByVal Obj As Object)
Dim cmd As New SqlCommand("sp_Resources_Categories", Conn)
cmd.CommandType = CommandType.StoredProcedure
Obj.DataSource = cmd.ExecuteReader
I...
How to delete all Annotations on a MKMapView
Is there a simple way to delete all the annotations on a map without iterating through all the displayed annotations in Objective-c?
...
Which parallel sorting algorithm has the best average case performance?
...If we have O(n) processors we would hope for a linear speedup. O(log n) parallel algorithms exist but they have a very high constant. They also aren't applicable on commodity hardware which doesn't have anywhere near O(n) processors. With p processors, reasonable algorithms should take O(n/p log n) ...
Correct Bash and shell script variable capitalization
I run across many shell scripts with variables in all caps, and I've always thought that there is a severe misunderstanding with that. My understanding is that, by convention (and perhaps by necessity long ago), environment variables are in all-caps.
...
Server polling with AngularJS
...
You should be calling the tick function in the callback for query.
function dataCtrl($scope, $timeout, Data) {
$scope.data = [];
(function tick() {
$scope.data = Data.query(function(){
$timeout(tick, 1000);
...
How to save traceback / sys.exc_info() values in a variable?
...traceback.format_exc()
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>>> print var
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
ValueError: invalid literal for int() with base 10: 'k'
You should however take a look at the traceback documentation, as you might find there more suitable metho...
Git: Create a branch from unstaged/uncommitted changes on master
...tatus still show your local changes, although you are on master.
If you really want to discard the local changes, you have to force the checkout with -f.
git checkout master -f
Since your changes were never committed, you'd lose them.
Try to get back to your branch, commit your changes, then ch...
Relatively position an element without it taking up space in document flow
... creating a zero-width, zero-height, relatively positioned element, essentially solely for the purpose of creating a reference point for position, and an absolutely positioned element within that:
<div style="position: relative; width: 0; height: 0">
<div style="position: absolute; lef...