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Create a variable name with “paste” in R?
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125
You can use assign (doc) to change the value of perf.a1:
> assign(paste("perf.a", "1", sep...
jQuery show for 5 seconds then hide
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answered Aug 7 '10 at 1:22
Nick Craver♦Nick Craver
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Appending to an empty DataFrame in Pandas?
...ata = pd.DataFrame({"A": range(3)})
>>> df.append(data)
A
0 0
1 1
2 2
But the append doesn't happen in-place, so you'll have to store the output if you want it:
>>> df
Empty DataFrame
Columns: []
Index: []
>>> df = df.append(data)
>>> df
A
0 0
1 1
2 ...
Search and Replace with RegEx components in Atom editor
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216
If you Cmd-F and open the search pane, there is a ".*" button at the right side. Click it and n...
Check if a value is within a range of numbers
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221
You're asking a question about numeric comparisons, so regular expressions really have nothing t...
Why does multiprocessing use only a single core after I import numpy?
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150
After some more googling I found the answer here.
It turns out that certain Python modules (n...
How to iterate over associative arrays in Bash
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591
The keys are accessed using an exclamation point: ${!array[@]}, the values are accessed using ${...
invalid multibyte char (US-ASCII) with Rails and Ruby 1.9
I'm using Ruby 1.9.1 with Rails 2.3.4 My application is to handle text input
6 Answers
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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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147
Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no lo...
Add 2 hours to current time in MySQL?
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edited Aug 20 '13 at 7:23
answered Feb 26 '09 at 8:41
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