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When should one use RxJava Observable and when simple Callback on Android?
... the advantages of RxJava over Callback is very limited. The simple getUserPhoto example:
RxJava:
api.getUserPhoto(photoId)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<Photo>() {
@Override
public void call(Photo photo) {
//...
Rails find record with zero has_many records associated [duplicate]
... found it here: https://stackoverflow.com/a/5570221/417872
City.includes(:photos).where(photos: { city_id: nil })
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Read file data without saving it in Flask
...
in function
def handleUpload():
if 'photo' in request.files:
photo = request.files['photo']
if photo.filename != '':
image = request.files['photo']
image_string = base64.b64encode(image.read())
image_s...
Automatically deleting related rows in Laravel (Eloquent ORM)
...nt to do the cleanup:
class User extends Eloquent
{
public function photos()
{
return $this->has_many('Photo');
}
// this is a recommended way to declare event handlers
public static function boot() {
parent::boot();
static::deleting(function($user...
Posting a File and Associated Data to a RESTful WebService preferably as JSON
...t use any file_id (uploaded file identifier to the server) in API:
Create photo object on server:
POST: /projects/{project_id}/photos
body: { name: "some_schema.jpg", comment: "blah"}
response: photo_id
Upload file (note that file is in singular form because it is only one per photo):
POST...
JavaScript: Upload file
...
Pure JS
You can use fetch optionally with await-try-catch
let photo = document.getElementById("image-file").files[0];
let formData = new FormData();
formData.append("photo", photo);
fetch('/upload/image', {method: "POST", body: formData});
async function SavePhoto(inp)
{
l...
Why does an image captured using camera intent gets rotated on some devices on Android?
...
Most phone cameras are landscape, meaning if you take the photo in portrait, the resulting photos will be rotated 90 degrees. In this case, the camera software should populate the Exif data with the orientation that the photo should be viewed in.
Note that the below solution depend...
Dialog to pick image from gallery or from camera
...
The code below can be used for taking a photo and for picking a photo. Just show a dialog with two options and upon selection, use the appropriate code.
To take picture from camera:
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityFo...
Execution of Python code with -m option or not
...
@flow2k: I mean that from Photos import ... will complain. So would import Photos.<something>. import Photos only works because Python supports namespaced packages (where two separate distributions provide Photos.foo and Photos.bar separately an...
Images can't contain alpha channels or transparencies
...
AFAIK png with transparency is not allowed. use jpg OR update your png (photoshop or whatever you using to create the png) and delete the transparency areas. if you work with shadows, use jpg, that will do no headaches.
s...