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Showing empty view when ListView is empty
... setContentView(R.layout.mylist);
// shows list view
String[] values = new String[] { "foo", "bar" };
// shows empty view
values = new String[] { };
setListAdapter(new ArrayAdapter<String>(
this,
android.R.layout.s...
Is memcached a dinosaur in comparison to Redis? [closed]
...choice may depend on the degree to which your application can leverage the extra data manipulation functionality in Redis.
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How to select a single field for all documents in a MongoDB collection?
... include several fields. In the following operation, find() method returns all documents that match the query. In the result set, only the item and qty fields and, by default, the _id field return in the matching documents.
db.inventory.find( { type: 'food' }, { item: 1, qty: 1 } )
In this example ...
Adding header for HttpURLConnection
...RLConnection myURLConnection = (HttpURLConnection)myURL.openConnection();
String userCredentials = "username:password";
String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userCredentials.getBytes()));
myURLConnection.setRequestProperty ("Authorization", basicAuth);
myURLConnection...
REST URI convention - Singular or plural name of resource while creating it
...rs like the linguistic correctness of saying "get resource #123", but it's extra coding hassle when writing clients of the API as well as help documentation. (GET /api/people vs. GET /api/person/123? euuuchh.) .... instead of thinking of it like "get resource #123", phrase it in your head like "ge...
How to create a responsive image that also scales up in Bootstrap 3
... put the .col class on the image will do the trick - however this gives it extra padding along with any other attributes associated with the class such as float left, however these can be cancelled by say for example a no padding class as an addition.
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What is the __del__ method, How to call it?
...is used, probably not like that: obj1.del() . So, my questions is how to call the __del__ method?
5 Answers
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How can I use if/else in a dictionary comprehension?
...
and you want to create a new dictionary whose keys indicate whether the string 'a' is contained in the values or not, you can use
dout = {"a_in_values_of_{}".format(k) if 'a' in v else "a_not_in_values_of_{}".format(k): v for k, v in d.items()}
which yields
{'a_in_values_of_key1': {'a', 'b', ...
When is del useful in python?
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One place I've found del useful is cleaning up extraneous variables in for loops:
for x in some_list:
do(x)
del x
Now you can be sure that x will be undefined if you use it outside the for loop.
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Why does C# disallow readonly local variables?
...ether the benefit of getting the compiler to do that checking is worth the extra "fluff" when reading the code and not actually caring about it.
– Jon Skeet
Jan 14 '09 at 20:52
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