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How to count certain elements in array?
...ar count = 0;
for(var i = 0; i < array.length; ++i){
if(array[i] == 2)
count++;
}
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Need a simple explanation of the inject method
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You can think of the first block argument as an accumulator: the result of each run of the blo...
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Concatenate two slices in Go
I'm trying to combine the slice [1, 2] and the slice [3, 4] . How can I do this in Go?
7 Answers
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Remap values in pandas column with a dict
I have a dictionary which looks like this: di = {1: "A", 2: "B"}
10 Answers
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How to install both Python 2.x and Python 3.x in Windows
...ging Library (PIL), ImageMagick, and wxPython, all of which require Python 2.x.
18 Answers
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JavaScript function similar to Python range()
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23 Answers
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Rounding up to next power of 2
I want to write a function that returns the nearest next power of 2 number. For example if my input is 789, the output should be 1024. Is there any way of achieving this without using any loops but just using some bitwise operators?
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How does one reorder columns in a data frame?
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Your dataframe has four columns like so df[,c(1,2,3,4)].
Note the first comma means keep all the rows, and the 1,2,3,4 refers to the columns.
To change the order as in the above question do df2[,c(1,3,2,4)]
If you want to output this file as a csv, do write.csv(df2, file...
Could not locate Gemfile
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answered Jul 25 '10 at 16:40
JoniJoni
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