command-line-interface

Is there a way to print a spinning cursor in a terminal using Python? nos Something like this, assuming your terminal handles \b import sys import time def spinning_cursor(): while True: for cursor in '|/-\\': yield cursor spinner = spinning_cursor() for _ in range(50): sys.stdout.write(next(spinner)) sys.stdout.flush() time.sleep(0.1) sys.stdout.write('\b') Victor Moyseenko Easy to use API (this will run the spinner in a separate thread): import sys import time import threading class Spinner: busy = False delay = 0.1 @staticmethod def spinning_cursor(): while 1: for cursor in '|/-\\': yield

I am trying to learn how to access PHP scripts from the command line (CLI) Below is an image from my attempt, please help. I am running Windows 7 You need to add your PHP installation directory to the %PATH% environment variable, or work from the PHP installation directory. To add it to path (The best approach - Edited for Windows 7 ): Right-click on a My Computer icon Click Properties Click Advanced system settings from the left nav Click Advanced tab Click Environment Variables button In the System Variables section, select Path (case-insensitive) and click Edit button Add a semi-colon ( ; )

grep can't be fed "raw" strings when used from the command-line, since some characters need to be escaped to not be treated as literals. For example: $ grep '(hello|bye)' # WON'T MATCH 'hello' $ grep '\(hello\|bye\)' # GOOD, BUT QUICKLY BECOMES UNREADABLE I was using printf to auto-escape strings: $ printf '%q' '(some|group)\n' \(some\|group\)\\n This produces a bash-escaped version of the string, and using backticks, this can easily be passed to a grep call: $ grep `printf '%q' '(a|b|c)'` However, it's clearly not meant for this: some characters in the output are not escaped, and some are

I am writing a batch script in order to beautify JavaScript code. It needs to work on both Windows and Linux . How can I beautify JavaScript code using the command line tools? Alan Storm First, pick your favorite Javascript based Pretty Print/Beautifier. I prefer the one at http://jsbeautifier.org/ , because it's what I found first. Downloads its file https://github.com/beautify-web/js-beautify/blob/master/js/lib/beautify.js Second, download and install The Mozilla group's Java based Javascript engine, Rhino . "Install" is a little bit misleading; Download the zip file, extract everything,

I'm trying to remove the first 37 lines from a very, very large file. I started trying sed and awk, but they seem to require copying the data to a new file. I'm looking for a "remove lines in place" method, that unlike sed -i is not making copies of any kind, but rather is just removing lines from the existing file. Here's what I've done... awk 'NR > 37' file.xml > 'f2.xml' sed -i '1,37d' file.xml Both of these seem to do a full copy. Is there any other simple CLI that can do this quickly without a full document traversal? There's no simple way to do inplace editing using UNIX utilities, but