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How to check whether a file is empty or not?
...ument.txt') as my_file:
... # I already have file open at this point.. now what?
... my_file.seek(0) #ensure you're at the start of the file..
... first_char = my_file.read(1) #get the first character
... if not first_char:
... print "file is empty" #first character is the em...
Is it possible to have a multi-line comments in R? [duplicate]
... <- function(x) {
# Non! Comment it out! We'll just do it once for now.
"if (x %in% 1:9) {
doTenEverythings()
}"
doEverythingOnce()
...
return(list(
everythingDone = TRUE,
howOftenDone = 1
))
}
The main limitation is that when you'...
Where and why do I have to put the “template” and “typename” keywords?
... my C++11 answer)
In order to parse a C++ program, the compiler needs to know whether certain names are types or not. The following example demonstrates that:
t * f;
How should this be parsed? For many languages a compiler doesn't need to know the meaning of a name in order to parse and basicall...
Using Kafka as a (CQRS) Eventstore. Good idea?
...they
have been consumed—for a configurable period of time. For example if
the retention is set for two days, then for the two days after a
message is published it is available for consumption, after which it
will be discarded to free up space. Kafka's performance is effectively
constant ...
Restarting cron after changing crontab file?
...
Ah it's that easy. It's now sudo service cron restart.
– CMCDragonkai
Jan 10 '14 at 18:25
...
opengl: glFlush() vs. glFinish()
...
I actually know what glFlush and glFinish do, and I can't tell what that image is saying. What's on the left side and the right? Also, was that image released in the Public Domain or under some license that allows you to post it on the I...
restrict edittext to single line
...
android:singleLine is now deprecated. From the documentation:
This constant was deprecated in API level 3.
This attribute is deprecated. Use maxLines instead to change the layout of a static text, and use the textMultiLine flag in the inputType a...
How to unit test abstract classes: extend with stubs?
... then become implementations of this new interface.
This means you can now test your previously abstract class using a mock instance of the new interface, and each new implementation through the now public interface. Everything is simple and testable.
Solution For 2
If you have the second si...
Git merge reports “Already up-to-date” though there is a difference
...
What I've done now is: git checkout master; git reset --hard test; This brings it back to the 'test' level. I then did a "git push --force origin master" to force changes back to the central repo.
– Charles Darke
...
Is there a good reason to use upper case for SQL keywords? [closed]
...itors didn't do code colouring.
I used to prefer all upper case, but I'm now leaning towards all lower.
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