puppy utility takes a filename as input, and does exactly what you would expect a puppy to do: it shreds it!
How to shred
Rip out the pages with your teethSplit the input file on newlines. Tear up each page with your pawsFor each line (not including the linefeed), pick a random integer
2 <= n <= # of characters in the line. Split the line into
nnon-empty non-overlapping substrings of random length.
Scatter the shreds all over the floorOutput each substring of each line to a unique random filename (
[a-zA-Z0-9]only, any consistent extension including none, length
1 <= n <= 12) in the current directory. Overwriting pre-existing files within the current directory (including the input file, if it is in the current directory) is acceptable, as long as it does not interfere with your submission running.
- There will never be an input where it is possible to use up all of the possible filenames.
- Files will consist of only printable ASCII (ordinals 32-127) and linefeeds, and will use UNIX/Linux-style line endings (LF, not the Windows-style CRLF).
- A single trailing newline in output files is acceptable as long as every output file has a trailing newline, but is not required. You may choose whether or not the input file contains a trailing newline.
- Each line in the input will contain at least 2 characters.
- The random values chosen must be chosen from a uniform random distribution on the given set of possible values.
If your language is unable to perform file I/O, you may instead take the input file's contents as input, and output pairs of strings representing the output filename and the text for that file. However, your submission will not be eligible for winning.
#!/usr/bin/env python3 import random import string import sys fname = sys.argv with open(fname) as f: txt = f.read().rstrip().split('\n') for line in txt: n = random.randint(2, len(line))-1 idxs = +random.sample(range(1, len(line)), n)+[len(line)] idxs.sort() splits =  for i in range(0, len(idxs)-1): splits.append(line[idxs[i]:idxs[i+1]]) ofnames =  for s in splits: flen = random.randint(1, 10) ofname = '' while ofname == '' or ofname in ofnames: ofname = '' for i in range(flen): ofname += random.choice(string.ascii_letters+string.digits) ofnames.append(ofname) with open(ofname, 'w') as f: f.write(s)
$ cat bestsong.txt Never gonna give you up Never gonna let you down Never gonna run around And desert you! $ puppy bestsong.txt $ ls 8675309 a bestsong.txt cSdhg Dq762 jq7t ret865 rick4life weu767g xyzzy $ cat 8675309 esert you! $ cat a Never gonna let you down $ cat cSdhg ive y $ cat Dq762 And d $ cat jq7t Never gonna g $ cat ret865 run arou $ cat rick4life Never gonna $ cat weu767g nd $ cat xyzzy ou up