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String comparison in Python: is vs. == [duplicate]
...
For all built-in Python objects (like
strings, lists, dicts, functions,
etc.), if x is y, then x==y is also
True.
Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can ha...
UINavigationController “back button” custom text?
... set here. If the previous view's title contains more than the limit of 11 chars, then the next view's back button will simply say "Back". There's no way around it except to create a new nav bar item from scratch as shown in the top-voted answer here.
– ray
Dec...
How to put the legend out of the plot
...d overlaps with the pie chart
The loc argument can take numbers instead of strings, which make calls shorter, however, they are not very intuitively mapped to each other. Here is the mapping for reference:
share
|...
Jackson and generic type reference
...avaType' works !!
I was trying to unmarshall (deserialize) a List in json String to ArrayList java Objects and was struggling to find a solution since days.
Below is the code that finally gave me solution.
Code:
JsonMarshallerUnmarshaller<T> {
T targetClass;
public ArrayList<T&...
Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...eDirect and MakePhoneCallDirect blocks that do the old behavior that needs extra permissions. We chose to have the existing SendMessage and MakePhoneCall blocks launch the default apps via Intents , as recommended by Google policy, which should work for most people.For receiving, we made it so that ...
How can I set response header on express.js assets
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@BrunoCasali extra headers are blocked by browser by default, see stackoverflow.com/a/37931084/1507207
– sbk201
Jan 14 at 6:31
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How to export collection to CSV in MongoDB?
...2049ed23065398 fixes the docs for 3.0.0-rc10 and later. It changes
Fields string `long:"fields" short:"f" description:"comma separated list of field names, e.g. -f name,age"`
to
Fields string `long:"fields" short:"f" description:"comma separated list of field names (required for exporting CSV) e...
What is the Python equivalent of Matlab's tic and toc functions?
... multiple levels of tics and tocs. It also allows one to change the format string of the toc statement to display additional information, which I liked about Eli's Timer class.
For some reason I got concerned with the overhead of a pure Python implementation, so I tested a C extension module as we...
How to get the file extension in PHP? [duplicate]
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No need to use string functions. You can use something that's actually designed for what you want: pathinfo():
$path = $_FILES['image']['name'];
$ext = pathinfo($path, PATHINFO_EXTENSION);
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Django self-referential foreign key
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You can pass in the name of a model as a string to ForeignKey and it will do the right thing.
So:
parent = models.ForeignKey("CategoryModel")
Or you can use the string "self"
parent = models.ForeignKey("self")
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