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How can I recall the argument of the previous bash command?
Is there a way in Bash to recall the argument of the previous command?
7 Answers
7
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How to get position of a certain element in strings vector, to use it as an index in ints vector?
...C++11 you can use std::distance in place of subtraction for both iterators and pointers:
ptrdiff_t pos = distance(Names.begin(), find(Names.begin(), Names.end(), old_name_));
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How to get the filename without the extension in Java?
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While Guava and Commons-IO may offer a little extra, you'd be surprised how many convenience methods are already included in JDK 7 with java.nio.file.Files and Path -- such as resolving base directories, one-line copying/moving files, ge...
git difftool, open all diff files immediately, not in serial
...m a directory diff.
This feature works well with Meld 3.14.2 for example, and lets you browse all modified files:
git difftool --dir-diff --tool=meld HEAD~ HEAD
This is a handy Bash function:
git-diff-meld() (
git difftool --dir-diff --tool=meld "${1:-HEAD~}" "${2:-HEAD}"
)
The answer that ...
Plot correlation matrix into a graph
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Quick, dirty, and in the ballpark:
library(lattice)
#Build the horizontal and vertical axis information
hor <- c("214", "215", "216", "224", "211", "212", "213", "223", "226", "225")
ver <- paste("DM1-", hor, sep="")
#Build the fa...
How to store decimal values in SQL Server?
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That gives you a total of 18 digits, 4 of which after the decimal point (and 14 before the decimal point).
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Determine the number of NA values in a column
...r of NA values in a data frame column. Say my data frame is called df , and the name of the column I am considering is col . The way I have come up with is following:
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How do you dismiss the keyboard when editing a UITextField
...eld sends its action when the user hits the Return ("Done", whatever) key, and also sends its delegate -textFieldShouldReturn:.
– Noah Witherspoon
Nov 8 '08 at 5:13
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matplotlib does not show my drawings although I call pyplot.show()
...xa64932c>]
In [3]: p.show()
If you edit ~/.matplotlib/matplotlibrc and change the backend to something like GtkAgg, you should see a plot. You can list all the backends available on your machine with
import matplotlib.rcsetup as rcsetup
print(rcsetup.all_backends)
It should return a list ...
Peak memory usage of a linux/unix process
Is there a tool that will run a command-line and report the peak RAM usage total?
20 Answers
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