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Restore file from old commit in git
...
git checkout 'master@{7 days ago}' -- path/to/file.txt
This will not alter HEAD, it will just overwrite the local file path/to/file.txt
See man git-rev-parse for possible revision specifications there (of course a simple hash (like dd9bacb) will do nicely)
Don't forget to...
How do I grep recursively?
...uld like, another method is to use --include option:
grep -r --include "*.txt" texthere .
You can also mention files to exclude with --exclude.
Ag
If you frequently search through code, Ag (The Silver Searcher) is a much faster alternative to grep, that's customized for searching code. For inst...
What is the difference between 'java', 'javaw', and 'javaws'?
...ion works with javaw:
javaw -cp ... mypath.MyClass ... arguments 1>log.txt 2>err.txt
It means, if the Java application prints out anything via System.out or System.err, it is written to those files, as also with using java (without w). Especially on starting java, the JRE may write starting...
How do I find which program is using port 80 in Windows? [duplicate]
...coming connections.
You can also run netstat -anb >%USERPROFILE%\ports.txt followed by start %USERPROFILE%\ports.txt to open the port and process list in a text editor, where you can search for the information you want.
You can also use PowerShell to parse netstat output and present it in a bet...
Catching an exception while using a Python 'with' statement
...
from __future__ import with_statement
try:
with open( "a.txt" ) as f :
print f.readlines()
except EnvironmentError: # parent of IOError, OSError *and* WindowsError where available
print 'oops'
If you want different handling for errors from the open call vs the working...
Pipe output and capture exit status in Bash
...d in your last foreground pipeline of commands.
<command> | tee out.txt ; test ${PIPESTATUS[0]} -eq 0
Or another alternative which also works with other shells (like zsh) would be to enable pipefail:
set -o pipefail
...
The first option does not work with zsh due to a little bit differen...
How can I read command line parameters from an R script?
...te(length(readLines(file)) * opt$factor))
}
Given an arbitrary file blah.txt with 23 lines.
On the command line:
Rscript script.R -h outputs
Usage: script.R [options] file
Options:
-n, --count_lines
Count the line numbers [default]
-f FACTOR, --factor=FACTOR
...
Creating an empty file in C#
...TF8 encoding (or unicode or something else): <File.WriteAllText("c:\del.txt", String.Empty, System.Text.Encoding.UTF8);>
– Fil
Mar 8 '17 at 14:54
1
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File system that uses tags rather than folders?
...ra tags can appear as directories inside /etc/init.d. If there is a file a.txt with three tags i.e 'etc', 'init.d' & 'asdf' then 'asdf' will appear as directory inside /etc/init.d and full path of a.txt will become /etc/init.d/asdf/a.txt.
...
How do I change the text of a span element using JavaScript?
...; //INSECURE!!
The right way:
span = document.getElementById("myspan");
txt = document.createTextNode("your cool text");
span.appendChild(txt);
For more information about this vulnerability:
Cross Site Scripting (XSS) - OWASP
Edited nov 4th 2017:
Modified third line of code according to @mumu...