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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...
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...
What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
... sort compares the numbers as floats, this allows scientific notation eg 1.234E10 but is slower and subject to rounding error (1.2345678 could come after 1.2345679), numeric sort is just a regular alphabetic sort that knows 10 comes after 9.
See http://www.gnu.org/software/coreutils/manual/htm...
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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Properties vs Methods
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152
From the Choosing Between Properties and Methods section of Design Guidelines for Developing Cla...
How to pass optional arguments to a method in C++?
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edited May 25 '18 at 10:44
AustinWBryan
2,86133 gold badges1616 silver badges3535 bronze badges
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Twitter Bootstrap CSS affecting Google Maps
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With Bootstrap 2.0, this seemed to do the trick:
#mapCanvas img {
max-width: none;
}
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How to dynamically compose an OR query filter in Django?
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162
You could chain your queries as follows:
values = [1,2,3]
# Turn list of values into list of Q...
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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