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Rails - Validate Presence Of Association?
... ActiveRecord::Base
has_one :profile
end
This way, Profile.create will now fail. I have to use user.create_profile or associate a user before saving a profile.
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How to write to an existing excel file without overwriting data (using pandas)?
...s writer.sheets to access the sheet.
## If you leave it empty it will not know that sheet Main is already there
## and will create a new sheet.
writer.sheets = dict((ws.title, ws) for ws in book.worksheets)
data_filtered.to_excel(writer, "Main", cols=['Diff1', 'Diff2'])
writer.save()
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Copy paste text into iOS simulator
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this is now the correct answer except as qwertzguy points out, you've got it backwards
– evanflash
Mar 13 '19 at 19:48
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Calculate distance between two points in google maps V3
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The link above is now broken, but the explanation of the method makes that not much of an issue.
– GChorn
Apr 4 '14 at 22:40
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Why should I learn Lisp? [closed]
... For that reason, Lisp is best suited to large and complicated problems.
Now, a complex problem isn't the same as a complicated one. A complex problem is one with a lot of small details, but which isn't hard. Writing an airline booking system is a complex business, but with enough money and prog...
Scanner is skipping nextLine() after using next() or nextFoo()?
... skip this you have to add the input.nextLine(). Hope this should be clear now.
Try it like that:
System.out.print("Insert a number: ");
int number = input.nextInt();
input.nextLine(); // This line you have to add (It consumes the \n character)
System.out.print("Text1: ");
String text1 = input.nex...
Is there a way to filter network requests using Google Chrome developer tools?
... Thanks, the domain: part is exactly what I was looking for right now. That and a bunch of others are currently covered in the documentation linked from the other answer
– JMM
May 26 '16 at 15:27
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fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'
... For those using Visual Studio 2013 - step 4 has been deprecated, you now make the change in the project properties -> configuration properties -> VC++ Directories - Library Directories
– PolyMesh
Mar 19 '14 at 23:05
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Simple way to calculate median with MySQL
...I'm having a hard time finding a simple way of calculating the median. For now, I'm returning all the rows to PHP, doing a sort, and then picking the middle row, but surely there must be some simple way of doing it in a single MySQL query.
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What is a “batch”, and why is GO used?
...the GO does so that the next batch can be run successfully and the client knows for sure the batch before it is done server-side.
– PositiveGuy
Apr 19 '10 at 15:44
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