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Remove an item from a dictionary when its key is unknown
What is the best way to remove an item from a dictionary by value, i.e. when the item's key is unknown? Here's a simple approach:
...
How to dismiss notification after action has been clicked
...e it an id - that is the unique id you can use to access it later (this is from the notification manager:
notify(int id, Notification notification)
To cancel, you would call:
cancel(int id)
with the same id. So, basically, you need to keep track of the id or possibly put the id into a Bundle ...
Programmatically saving image to Django ImageField
...s an image off the web and stores it in a model. The important bits are:
from django.core.files import File # you need this somewhere
import urllib
# The following actually resides in a method of my model
result = urllib.urlretrieve(image_url) # image_url is a URL to an image
# self.photo is ...
Android Emulator: Installation error: INSTALL_FAILED_VERSION_DOWNGRADE
...ionCode (integer value for your version number).
You might have installed from a separate copy of the code where the version number was higher than the copy you're working with right now. In either case, either:
uninstall the currently installed copy
or open up your phone's Settings > Applica...
Disable ActiveRecord for Rails 4
...ew my_app -O
For existing applications:
1. Remove database adapter gems from your Gemfile (mysql2, sqlite3, etc.)
2. Change your config/application.rb
Remove require 'rails/all line and require frameworks (among those available in your rails version, the list varies, do not just copy) you want ...
Getting an element from a Set
... set should be all about. In my case, I'd like to get some complex object from a set by key (String). This String is encapsulated (and unique) to the object being mapped. In fact, the whole object 'revolves' around said key. Furthermore, the caller knows said String, but not the object itself; that...
Pick a random value from an enum?
...d answer and that left me with boilerplate code when I needed to randomize from my second Enum. Also, it's easy to forget about SecureRandom sometimes. Thanks.
– Siamaster
Jul 30 '18 at 10:43
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Getting rid of bullet points from
...
To remove bullet points from unordered lists , you can use:
list-style: none;
You can also use:
list-style-type: none;
Either works but the first is a shorter way to get the same result.
...
Set theme for a Fragment
...container, Bundle savedInstanceState) {
// create ContextThemeWrapper from the original Activity Context with the custom theme
final Context contextThemeWrapper = new ContextThemeWrapper(getActivity(), R.style.yourCustomTheme);
// clone the inflater using the ContextThemeWrapper
La...
How do you get a directory listing sorted by creation date in python?
...te: to sort dirpath's entries by modification date in Python 3:
import os
from pathlib import Path
paths = sorted(Path(dirpath).iterdir(), key=os.path.getmtime)
(put @Pygirl's answer here for greater visibility)
If you already have a list of filenames files, then to sort it inplace by creation ...