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Numbering rows within groups in a data frame
... It might be worth mentioning that ave gives a float instead of an int here. Alternately, could change df$val to seq_len(nrow(df)). I just ran into this over here: stackoverflow.com/questions/42796857/…
– Frank
Mar 14 '17 at 22:07
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How to extract text from a PDF? [closed]
... PDFMiner and pyPDF2. For more information on these, see Python module for converting PDF to text.
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What does .class mean in Java?
...at does .class mean in Java? For example, if I created a class called Print . What does Print.class return?
7 Answers
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Start a git commit message with a hashmark (#)
... smart enough to recognize '#' as the comment char in custom templates and convert it if the final comment char is different.
It thinks '#' lines in custom templates as part of the commit message. So don't use this with custom templates.
The list of candidate characters for "auto" are:
# ; @ ! $ % ...
See line breaks and carriage returns in editor
...acters according to what fileformat options has been detected, essentially converting all those internal $'s with appropriate characters. If the fileformat happened to be unix then it will simply write \n in place of its internal line-break.
The trick is to force Vim to read a dos encoded file as u...
How to start a Process as administrator mode in C# [duplicate]
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Assuming your password is password, you can do for (int x = 0; x < password.Length; x++) { pass.AppendChar(password[x]); }
– Mark Richman
Jun 10 '16 at 15:23
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What's the role of adapters in Android?
...ou can populate your ListViews by using an Android adapter.
Adapter is an interface whose implementations provide data and control the display of that data.
ListViews own adapters that completely control the ListView’s
display.
So adapters control the content displayed in the list as well as how ...
clearing a char array c
...\0' is equal to 0 (in ascii) but you should use '\0' because it makes your intention clear
– Mark Testa
Mar 11 '09 at 2:23
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Evaluate expression given as a string
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You can use the parse() function to convert the characters into an expression. You need to specify that the input is text, because parse expects a file by default:
eval(parse(text="5+5"))
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Best way to split string into lines
How do you split multi-line string into lines?
10 Answers
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