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sed one-liner to convert all uppercase to lowercase?
....txt > output.txt for GNU sed works fine too
– Asfand Qazi
Apr 13 '17 at 8:49
1
@ekkis OSX is ...
Get current directory name (without full path) in a Bash script
...rking directory name in a bash script, or even better, just a terminal command.
20 Answers
...
Pandas dataframe get first row of each group
I have a pandas DataFrame like following.
5 Answers
5
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List files by last edited date
...
You can use:
ls -Rt
where -R means recursive (include subdirectories) and -t means "sort by last modification date".
To see a list of files sorted by date modified, use:
ls -l -Rt
An alias can also be created to achieve this:
alias lt='ls -lht'
lt
Where -h gives a more readable output....
How do I hide a menu item in the actionbar?
...Item pointing to such item, call setVisible on it to adjust its visibility and then call invalidateOptionsMenu() on your activity so the ActionBar menu is adjusted accordingly.
Update: A MenuItem is not a regular view that's part of your layout. Its something special, completely different. Your cod...
scala vs java, performance and memory? [closed]
I am keen to look into Scala, and have one basic question I cant seem to find an answer to:
in general, is there a difference in performance and usage of memory between Scala and Java?
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In Ruby, how do I skip a loop in a .each loop, similar to 'continue' [duplicate]
...
end
prints:
1
3
5
7
9
For additional coolness check out also redo and retry.
Works also for friends like times, upto, downto, each_with_index, select, map and other iterators (and more generally blocks).
For more info see http://ruby-doc.org/docs/ProgrammingRuby/html/tut_expressions.html#...
Check if a given key already exists in a dictionary
...()
for i in range(100):
key = i % 10
d[key] = d.get(key, 0) + 1
and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:
from collections import defaultdict
d = defaultdict(int)
f...
How to delete history of last 10 commands in shell?
Commands follows
18 Answers
18
...
Scatterplot with too many points
...+ geom_point(alpha = 0.3)
Another convenient way to deal with this is (and probably more appropriate for the number of points you have) is hexagonal binning:
ggplot(df,aes(x=x,y=y)) + stat_binhex()
And there is also regular old rectangular binning (image omitted), which is more like your tr...