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How to remove last n characters from every element in the R vector
..._bar","bar_foo","apple","beer")
a = data.frame("data"=char_array,"data2"=1:4)
a$data = substr(a$data,1,nchar(a$data)-3)
a should now contain:
data data2
1 foo_ 1
2 bar_ 2
3 ap 3
4 b 4
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Algorithm to generate a crossword
...it there and go to step 3, otherwise, continue searching for a place (step 4).
Continue this loop until all the words are either placed or unable to be placed.
This makes a working, yet often quite poor crossword. There were a number of alterations I made to the basic recipe above to come up with ...
Is SHA-1 secure for password storage?
...stion is: SHA-1 is as secure as you can get. MD5 would be fine too, even MD4; but it could make some investors nervous. For public relations, it is best to use a "better" hash function, e.g. SHA-256, even if you truncate its output to 160 or 128 bits (to save on storage cost). Some of the SHA-3 roun...
How do I force make/GCC to show me the commands?
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edited Jan 8 '17 at 4:43
Steven Penny
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Hiding user input on terminal in Linux script
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answered Nov 30 '10 at 17:46
Andreas WongAndreas Wong
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Difference between del, remove and pop on lists
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1423
The effects of the three different methods to remove an element from a list:
remove removes th...
What do all of Scala's symbolic operators mean?
... simply methods on a class. For instance, if you do
List(1, 2) ++ List(3, 4)
You'll find the method ++ right on the ScalaDoc for List. However, there's one convention that you must be aware when searching for methods. Methods ending in colon (:) bind to the right instead of the left. In other wor...
Python module for converting PDF to text [closed]
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144
Try PDFMiner. It can extract text from PDF files as HTML, SGML or "Tagged PDF" format.
The Tag...
How to get the nvidia driver version from the command line?
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141
Using nvidia-smi should tell you that:
bwood@mybox:~$ nvidia-smi
Mon Oct 29 12:30:02 2012 ...