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Java String split removed empty values
...[] split = data.split("\\|", -1);
Little more details:
split(regex) internally returns result of split(regex, 0) and in documentation of this method you can find (emphasis mine)
The limit parameter controls the number of times the pattern is applied and therefore affects the length of the resultin...
How to require a controller in an angularjs directive
...});
Each directive will get its own instance of the controller, but this allows you to share the logic between as many components as you want.
Require a Controller
If you want to share the same instance of a controller, then you use require.
require ensures the presence of another directive an...
Output array to CSV in Ruby
...enerate_line(row) }.join("")
#=> "a1,a2,a3\nb1,b2,b3\nc1,c2,c3\n"
Do all of the above and save to a csv, in one line.
File.open("ss.csv", "w") {|f| f.write(rows.inject([]) { |csv, row| csv << CSV.generate_line(row) }.join(""))}
NOTE:
To convert an active record database to csv would...
Why is git push gerrit HEAD:refs/for/master used instead of git push origin master
...o the staging area (in the diagram, "Pending Changes"). Gerrit doesn't actually have a branch called <BRANCH>; it lies to the git client.
Internally, Gerrit has its own implementation for the Git and SSH stacks. This allows it to provide the "magical" refs/for/<BRANCH> refs.
When ...
“R cannot be resolved to a variable”? [duplicate]
...nd, huh? :) If you can't get R.java to build in the first place, it's usually a typo or other problem in an XML layout file. Using a capital letter in your XML filenames will also cause that problem. If R.java does exist but variables in it aren't recognized by just one Java file, for instance, ...
Build .so file from .c file using gcc command line
...lo.c
to do it in one step. – Jonathan Leffler
I also suggest to add -Wall to get all warnings, and -g to get debugging information, to your gcc commands. – Basile Starynkevitch
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impro...
Setting the filter to an OpenFileDialog to allow the typical image formats?
I have this code, how can I allow it to accept all typical image formats? PNG, JPEG, JPG, GIF?
11 Answers
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How to undo 'git reset'?
...
Short answer:
git reset 'HEAD@{1}'
Long answer:
Git keeps a log of all ref updates (e.g., checkout, reset, commit, merge). You can view it by typing:
git reflog
Somewhere in this list is the commit that you lost. Let's say you just typed git reset HEAD~ and want to undo it. My reflog look...
arrayfun can be significantly slower than an explicit loop in matlab. Why?
...lution is clearly the fastest, you can see that defining a function to be called for every x entry is a huge overhead. Just explicitly writing out the computation got us factor 5 speedup. I guess this shows that MATLABs JIT compiler does not support inline functions. According to the answer by gnovi...
Twitter bootstrap float div right
...This shouldn't be the accepted answer. There's a built in bootstrap class called pull-right (credit to @Amit); IMO, it's cleaner to use a built-in Bootstrap class... and OP asked for that in his question
– Kolob Canyon
Aug 30 '18 at 16:18
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