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How to rename a single column in a data.frame?
...nswered May 10 '13 at 20:33
Side_0o_EffectSide_0o_Effect
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...
Scala list concatenation, ::: vs ++
...matic Scala 2.10 has :+ and +: object extractors.
– 0__
Jan 18 '13 at 9:25
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Django Rest Framework File Upload
... an example in the docs :)
class FileUploadView(views.APIView):
parser_classes = (FileUploadParser,)
def put(self, request, filename, format=None):
file_obj = request.FILES['file']
# do some stuff with uploaded file
return Response(status=204)
...
jQueryUI Tooltips are competing with Twitter Bootstrap
...javascript" src="/js/bootstrap.js"></script>
<script>var _tooltip = jQuery.fn.tooltip;</script>
<script type="application/javascript" src="/js/jquery-ui.js"></script>
<script>jQuery.fn.tooltip = _tooltip;</script>
This will override jquery-ui'...
Make a UIButton programmatically in Swift
..., 500)
myFirstButton.addTarget(self, action: #selector(myClass.pressed(_:)), forControlEvents: .TouchUpInside)
self.view.addSubview(myFirstLabel)
self.view.addSubview(myFirstButton)
}
@objc func pressed(sender: UIButton!) {
var alertView = UIAlertView()
alertView.addButtonWithTi...
How to get the IP address of the docker host from inside a docker container
...ses only.
For example, I have environment variables set on my host:
MONGO_SERVER=host.docker.internal
In my docker-compose.yml file, I have this:
version: '3'
services:
api:
build: ./api
volumes:
- ./api:/usr/src/app:ro
ports:
- "8000"
environment:
- MONGO_S...
What are bitwise shift (bit-shift) operators and how do they work?
...d |
To get at the green value you would do this:
#define GREEN_MASK 0x7E0
#define GREEN_OFFSET 5
// Read green
uint16_t green = (pixel & GREEN_MASK) >> GREEN_OFFSET;
Explanation
In order to obtain the value of green ONLY, which starts at offset 5 and ends at 10 (i.e. ...
Proper way to wait for one function to finish before continuing?
... work like this is to use a callback function, eg:
function firstFunction(_callback){
// do some asynchronous work
// and when the asynchronous stuff is complete
_callback();
}
function secondFunction(){
// call first function and pass in a callback function which
// first ...
Javascript: Extend a Function
...ook like this:
function init(){
doSomething();
}
//anytime later
var old_init = init;
init = function() {
old_init.apply(this, arguments);
doSomethingHereToo();
};
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'typeid' versus 'typeof' in C++
...ns type identification information at run time. It basically returns a type_info object, which is equality-comparable with other type_info objects.
Note, that the only defined property of the returned type_info object has is its being equality- and non-equality-comparable, i.e. type_info objects de...