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In Django, how does one filter a QuerySet with dynamic field lookups?
... query criteria (such as just people who completed a certain workshop). In order for the survey element to be re-usable, I needed for the person creating the survey question to be able to attach those criteria to that question (don't want to hard-code the query into the app).
The solution I came u...
iOS Tests/Specs TDD/BDD and Integration & Acceptance Testing
...tput goes into the build window where you have to unfold the build step in order to read it.
We wanted easy to read test reporting, both on the command line and in Xcode. OCUnit results appear nicely in the build window in Xcode, but building from the command line (or as part of a CI process) res...
Adding an identity to an existing column
...column of a of a 2.5 billion row table from IDENTITY to a non-IDENTITY (in order to run a multi-hour query whose query plan worked better for non-IDENTITY columns), and then restored the IDENTITY setting, again in less than 5 seconds.
Here's a code sample of how it works.
CREATE TABLE Test
(
...
Python speed testing - Time Difference - milliseconds
What is the proper way to compare 2 times in Python in order to speed test a section of code? I tried reading the API docs. I'm not sure I understand the timedelta thing.
...
Pointer expressions: *ptr++, *++ptr and ++*ptr
...efix and dereference have the same precedence and so they are evaluated in order right-to-left
++*ptr - similar to the above in terms of precedence, again going from right-to-left in order dereference the pointer and then increment what the pointer points to. Please note that in your case this one ...
Why is there no Tree class in .NET?
...
Beware that elements are un-ordered this way
– Sebastian
Aug 2 '16 at 10:15
...
iPad/iPhone hover problem causes the user to double click a link
...
Remove hover effects on mouseleave, touchmove and click.
Background
In order to simulate a mouse, browsers such as Webkit mobile fire the following events if a user touches and releases a finger on touch screen (like iPad) (source: Touch And Mouse on html5rocks.com):
touchstart
touchmove
touch...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...