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Deleting lines from one file which are in another file
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grep -v -x -f f2 f1 should do the trick.
Explanation:
-v to select non-matching lines
-x to match whole lines only
-f f2 to get patterns from f2
One can instead use grep -F or fgrep to match fixed strings from f2 rather than patterns (...
Convert a String In C++ To Upper Case
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29 Answers
29
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Properties vs Methods
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152
From the Choosing Between Properties and Methods section of Design Guidelines for Developing Cla...
Repeat each row of data.frame the number of times specified in a column
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Here's one solution:
df.expanded <- df[rep(row.names(df), df$freq), 1:2]
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
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im...
Getting and removing the first character of a string
I would like to do some 2-dimensional walks using strings of characters by assigning different values to each character. I was planning to 'pop' the first character of a string, use it, and repeat for the rest of the string.
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本文档最初由米尔斯学院（Mills College）的 Kate Feeney 为 AI Classic 编写。该计...
How to view UTF-8 Characters in VIM or Gvim
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62
Try to reload the document using:
:e! ++enc=utf8
If that works you should maybe change the f...
Working with huge files in VIM
I tried opening a huge (~2GB) file in VIM but it choked. I don't actually need to edit the file, just jump around efficiently.
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Function Pointers in Java
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126
The Java idiom for function-pointer-like functionality is an an anonymous class implementing an...