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Sorting a tab delimited file
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Using bash, this will do the trick:
$ sort -t$'\t' -k3 -nr file.txt
Notice the dollar sign in front of the single-quoted string. You can read about
it in the ANSI-C Quoting sections of the bash man page.
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How to ignore xargs commands if stdin input is empty?
...or both GNU and BSD/OSX support I end up using something like: ls /mydir/*.txt | xargs -n 1 -I {} chown root {}, as this answer suggests.
– Luís Bianchin
Jul 17 '18 at 11:12
3
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How do I use Java to read from a file that is actively being written to?
...eredInputStream reader = new BufferedInputStream(new FileInputStream( "out.txt" ) );
public void run() {
while( running ) {
if( reader.available() > 0 ) {
System.out.print( (char)reader.read() );
}
else {
try {
sleep( 500 );
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Python script to copy text to clipboard [duplicate]
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To use native Python directories, use:
import subprocess
def copy2clip(txt):
cmd='echo '+txt.strip()+'|clip'
return subprocess.check_call(cmd, shell=True)
on Mac, instead:
import subprocess
def copy2clip(txt):
cmd='echo '+txt.strip()+'|pbcopy'
return subprocess.check_call(cmd...
How to include package data with setuptools/distribute?
...ettings.xml
- words
- __init__.py
word_set.txt
setup.py:
from setuptools import setup, find_packages
import os.path
setup (
name='myproject',
version = "4.19",
packages = find_packages(),
# package_dir={'mypkg': 'src/mypkg'}, # didnt use this.
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How to download a file from server using SSH? [closed]
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In your terminal, type:
scp your_username@remotehost.edu:foobar.txt /local/dir
replacing the username, host, remote filename, and local directory as appropriate.
If you want to access EC2 (or other service that requires authenticating with a private key), use the -i option:
scp -i key...
How to duplicate virtualenv
..., go into your original virtualenv, and run:
pip freeze > requirements.txt
This will generate the requirements.txt file for you. If you open that file up in your favorite text editor, you'll see something like:
Django==1.3
Fabric==1.0.1
etc...
Now, edit the line that says Django==x.x to say...
Using Server.MapPath in external C# Classes in ASP.NET
...ar path = System.Web.Hosting.HostingEnvironment.MapPath("~/App_Data/myfile.txt")
if
var path = Server.MapPath("~/App_Data");
var fullpath = Path.Combine(path , "myfile.txt");
is inaccessible
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How do I check if a file exists in Java?
...ll return true if your path points to a directory.
new File("path/to/file.txt").isFile();
new File("C:/").exists() will return true but will not allow you to open and read from it as a file.
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psql - save results of command to a file
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Welcome to psql 8.3.6, the PostgreSQL interactive terminal
db=>\o out.txt
db=>\dt
db=>\q
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