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dynamically add and remove view to viewpager
...o set the adapter
// again. When doing so, it deletes all its views. Then we can delete the view
// from from the adapter and finally set the adapter to the pager again. Note
// that we set the adapter to null before removing the view from "views" - that's
// because while ViewPag...
Connect to a heroku database with pgadmin
... application in which you have the database
Select the Resources tab and then click on "Heroku Postgres Ad-on" (see below). This will open up a new tab.
Select the Settings tab and then click on "View Credentials..." (see below)
You will get the following information that you will use in pgAd...
How to access pandas groupby dataframe by key
...ict = {str(indx): str(val) for indx in gb.indx for val in gb.some_key} and then retrieve value via gb_dict[some_key]
– user2476665
Mar 18 '16 at 0:20
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Difference between abstract class and interface in Python
...e(Effable):
def __str__(self):
return 'expressable!'
we are then able to use the concrete version of the class derived from the abstract one:
>>> me = MyEffable()
>>> print(me)
expressable!
There are other things we could do with this, like register virtual subcla...
How to immediately see compile errors in project tree of IntelliJ Idea?
...roject. However, it works when there's a compilation problem in a file and then I fix the problem in another file. Example: class A uses a private method of B, then change method of B to public.
– Jordan Silva
Nov 11 '19 at 11:36
...
What is a simple/minimal browserconfig.xml for a web site
...ser.xml - for NGINX, you can create a new file in /etc/nginx/snippets/ and then #include that file in your /etc/nginx/sites-available/example.org file inside of the server block.
Example: /etc/nginx/snippets/block-known-errors.conf has the following contents:
location ~* /(favicon.ico|browserconfi...
Maven: missing net.sf.json-lib
...he central repository . Copy-pasted the dependency (with version 2.3), and then when I build I get this error:
4 Answers
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What is causing this ActiveRecord::ReadOnlyRecord error?
...6th, 2005):
Introduce read-only records. If you call object.readonly! then it will
mark the object as read-only and raise
ReadOnlyRecord if you call
object.save. object.readonly? reports
whether the object is read-only.
Passing :readonly => true to any
finder method will mark r...
What is an SSTable?
...
How can it both be sorted and immutable then?
– xjcl
Jul 28 at 13:06
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Cast an instance of a class to a @protocol in Objective-C
...ase, if you are checking if an object conforms to a protocol why would you then call some other method unrelated to the protocol? I can't recall ever needing to do this or seeing this in code I've reviewed. Seems like a code smell to me.
– memmons
Dec 1 '13 at ...