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How to apply a function to two columns of Pandas dataframe
...s to be taken around datatypes.
In your example, you would (as I did when testing the answer) naively call
df['col_3'] = df.col_1.combine(df.col_2, func=get_sublist)
However, this throws the error:
ValueError: setting an array element with a sequence.
My best guess is that it seems to expec...
How can I add an ampersand for a value in a ASP.net/C# app config file value
...at DLeh is talking about exactly, but unescape definitely works fine. Just tested this with standard appSettings as well as a custom NameValueCollection section: ampersand is unescaped properly on both.
– julealgon
Nov 4 '19 at 22:25
...
Resharper- Find all unused classes
...ally be sure unless every time you remove the unused class you run all the tests inside your application [every possible layer] to be 80% sure you are safe. Moral of the story : a class might sound unused to Resharper but it might be resurrected when you use Dependency Injection.
...
Responsive website zoomed out to full width on mobile
I am testing out Bootstrap responsiveness navbar and I have a demo website. When I resize the browser on a desktop, it all works fine including the nav bar which become collapsible menu with a small icon on the top which I can click to see more menu buttons.
...
Handler is abstract ,cannot be instantiated
... break;
case R.id.btnTets:
Log.d(LOG_TAG, "test");
break;
default:
break;
}
}
public void downloadFile(){
try{
TimeUnit.SECONDS.sleep(1);
}
catch (InterruptedException e){...
String.equals versus == [duplicate]
... with "equivalence". The this == anObject check is semantically exactly a test that one is comparing the same two objects (equality), which by definition therefore must be equivalent. The final return true after the while loop does not mean we have the same "Jorman", it means the that the two ent...
jQuery form serialize - empty string
...to give the input element a name. E.g.:
<form id="form1" action="/Home/Test1" method="post" name="down">
<div id="div2">
<input id="input1" type="text" value="2" name="foo"/>
</div>
</form>
will give you in the alert box foo=2.
.serialize() takes...
Update data in ListFragment as part of ViewPager
...
Okay, after testing the method by @barkside above, I could not get it to work with my application. Then I remembered that the IOSched2012 app uses a viewpager as well, and that is where I found my solution. It does not use any fragment I...
How to change column datatype from character to numeric in PostgreSQL 8.4
... drop the FK, change both columns, and then add the FK back. You do have a test database to play with and a backup of the production database, right?
– mu is too short
Oct 7 '11 at 5:42
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pandas: multiple conditions while indexing data frame - unexpected behavior
...like df[True & False] fails but df[(True) & (False)] succeeds (not tested on this example)
– 3pitt
Feb 15 '18 at 20:26
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