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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...
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How to show all shared libraries used by executables in Linux?

...nu/libuuid.so.1.3.0 This method also shows libraries opened with dlopen, tested with this minimal setup hacked up with a sleep(1000) on Ubuntu 18.04. See also: https://superuser.com/questions/310199/see-currently-loaded-shared-objects-in-linux/1243089 ...
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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 ...
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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. ...
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Can you “ignore” a file in Perforce?

... remember doing this before, but I don't have the necessary permissions to test this here. Check out Perforce's Sysadmin guide and try it out share | improve this answer | fo...
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rbenv not changing ruby version

...env. Deleted .ruby-versions and ran rbenv versions again and it had the latest selected by rbenv ( be sure you have the eval statement above in .bash_profile!). Now, all works as before. Thanks for helping me get this solved. – John Wooten Jul 11 '19 at 14:4...
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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. ...
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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){...
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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...
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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...