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What is the point of function pointers?
...couple of void pointers to sortable data and a pointer to a function that knows how to compare two elements of these data structures. This allows us to create our function of choice for the job, and in fact even allows for choosing the comparison function at run time, e.g. for sorting ascending or d...
How do you know when to use fold-left and when to use fold-right?
...accumulator function x
fold x [A, B, C, D]
thus equals
A x B x C x D
Now you just have to reason about the associativity of your operator (by putting parentheses!).
If you have a left-associative operator, you'll set the parentheses like this
((A x B) x C) x D
Here, you use a left fold. Ex...
Correct way to pass multiple values for same parameter name in GET request
...ng the request, send the request like this
http://server/action?id=a,b
2. Now in my backend, I split the value received with a split function which always creates a list.
id_filter = id.split(',')
Example:
So if I send two values in the request,
http://server/action?id=a,b
then the filter on the ...
What's the difference between SCSS and Sass?
...swer the question:
There are two syntaxes available for Sass. The first, known as SCSS (Sassy CSS) and used throughout this reference, is an extension of the syntax of CSS. This means that every valid CSS stylesheet is a valid SCSS file with the same meaning. This syntax is enhanced with the Sass f...
Using CSS :before and :after pseudo-elements with inline CSS?
...ove: its not possible to call a css pseudo-class / -element inline.
what i now did, is:
give your element a unique identifier, f.ex. an id or a unique class.
and write a fitting <style> element
<style>#id29:before { content: "*";}</style>
<article id="id29">
<!-- someth...
How do you create a transparent demo screen for an Android app?
...a transparent activity, so you will be able to see the activity below it.
Now I'm guessing you want a translucent background too.
In the xml layout (of your transparent activity) add:
android:background="#aa000000"
The last 6 digits define the color: 000000 is black.
The first 2 define the o...
How can I display an RTSP video stream in a web page?
...
Update: Apparently doesn't work now. Shows this: "This camera cannot be embedded. Switch to Standard or Professional package for embedding."
– muglikar
Apr 23 '17 at 19:55
...
An async/await example that causes a deadlock
...hat was returned by GetStringAsync.
The continuation for GetJsonAsync is now ready to run, and it waits for the context to be available so it can execute in the context.
Deadlock. The top-level method is blocking the context thread, waiting for GetJsonAsync to complete, and GetJsonAsync is waiti...
Navigation Drawer (Google+ vs. YouTube)
Does anyone know how to implement a sliding menu like some of the top apps of today?
5 Answers
...
AttributeError: 'module' object has no attribute 'tests'
...ews.py) was still trying to import the deleted model.
When I took out the now-obsolete import statement, problem solved.
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