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How to organize large R programs?
...se packages -- see the Writing R Extensions manual as well as different tutorials on the web.
It gives you
a quasi-automatic way to organize your code by topic
strongly encourages you to write a help file, making you think about the interface
a lot of sanity checks via R CMD check
a chance to ad...
What does %~d0 mean in a Windows batch file?
... the file name. They can be combined so ~dp is drive+path.
%~dp0 is therefore pretty useful in a bat: it is the folder in which the executing bat file resides.
You can also get other kinds of meta info about the file: ~t is the timestamp, ~z is the size.
Look here for a reference for all command...
How to list only the file names that changed between two commits?
...ed to include enough of the SHA to identify the commits. You can also do, for example
git diff --name-only HEAD~10 HEAD~5
to see the differences between the tenth latest commit and the fifth latest (or so).
share
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Calendar returns wrong month [duplicate]
...t of that? It is supposed to be a calendar not a puzzle. Days are indexed normally, years too. Dont you think that Android developers have made an error. Yeah, of course they did, and they cant correct it just because it would be incompatible with milions of older apps.
– Tome...
Can gcc output C code after preprocessing?
...source library which seems to have lots of preprocessing directives to support many languages other than C. So that I can study what the library is doing I'd like to see the C code that I'm compiling after preprocessing, more like what I'd write.
...
How to retrieve the current value of an oracle sequence without increment it?
...tadata from user_sequences, all_sequences and dba_sequences.
These views work across sessions.
EDIT:
If the sequence is in your default schema then:
SELECT last_number
FROM user_sequences
WHERE sequence_name = '<sequence_name>';
If you want all the metadata then:
SELECT *
FROM user...
How to add 30 minutes to a JavaScript Date object?
...
Using a Library
If you are doing a lot of date work, you may want to look into JavaScript date libraries like Datejs or Moment.js. For example, with Moment.js, this is simply:
var newDateObj = moment(oldDateObj).add(30, 'm').toDate();
Vanilla Javascript
This is like ch...
How to convert object array to string array in Java
...
Hrm. I couldn't get this one to work, where the long-form example in the original question does work. It throws java.lang.ArrayStoreException. I'm getting the object array from the toArray method on a generic ArrayList containing my custom type. Is this not ...
Open firewall port on CentOS 7
I am using CentOS 7 and I have to ensure that ports 2888 and 3888 are open.
12 Answers
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How to handle dependency injection in a WPF/MVVM application
...
I have been using Ninject, and found that it's a pleasure to work with. Everything is set up in code, the syntax is fairly straightforward and it has a good documentation (and plenty of answers on SO).
So basically it goes like this:
Create the view model, and take the IStorage interf...