JimDennis

dic = {} 
for idx, char in enumerate (string):
  if char! =' ':
    if char not in dic:
      dic [char] = [idx] 
    else:
      dic [char].append(idx)
      

JimDennis

Offer nixos-enter after nixos-install as Per https://nixos.wiki/wiki/Change_root

After one has installed NixOS as per the instructions at: https://nixos.org/manual/nixos/stable/index.html#sec-installation
consider prompting the user and offering to perform nixos-enter to chroot into /mnt.

This can allow the new user to explore their new installation before reboot; but it also teaches them how they might later
use the nix-enter command for rescue perposes.

Of course getting value of this is in providing enough information in the prompt to inform the user of the option,
offer them more info, and showing them what it's doing (much as the web page is already doing; but presented there

JimDennis

#!/usr/bin/env python3.8
import responder
# Raises: ModuleNotFoundError: No module named 'responder'

JimDennis

def prefixer(fn, prefix):
    '''Return a wrapper which prefix first (string) argument with prefix'''
    def wrapper(output, *args, **kwargs):
        output = '%s%s' % (prefix, output)
        return fn(output, *args, **kwargs)
    return wrapper

## Example of a decorator WITHOUT using the @wrapper syntactic sugar
##    (to save ref to print if we want to use it later: old_print = print)

JimDennis

# Regular expression to validate if a string is a valid integer with
# commas separating thousands, millions, billions and so on
import re

# start with some test cases:
good_tests = ['1', '12', '123', '1,234', '12,345', '123,456',
              '1,234,567', '12,345,678', '123,456,789']
fail_tests = ['1234', '1,2345', '12,34', '1,2', '1,23', '1.2', '1,234.5']

# implement a test harness

JimDennis

# Take output from iwinfo "$INTERFACE" scan command
# ... combine each stanza (record) into a single line and
# prefix with hostname
# Call with -v h="$HOSTNAME"

BEGIN {h=sprintf("%s:\t", h); line=h};
/^[^ ]/ {print line; line=h};
/^ /    {line=sprintf("%s %s", line, $0)};
END {print line}

JimDennis

#!/usr/bin/env python
from __future__ import print_function
from string import uppercase
key = dict()
for plain,code in zip(uppercase, uppercase[13:]+uppercase[:13]):
    key[plain] = code
    key[plain.lower()] = code.lower()

def rot13(msg):
    results = ''.join([key.get(c,c) for c in msg])

JimDennis

#!/usr/bin/env python2
''' Eratosthenes sieve
'''
from __future__ import print_function

import array
import time


start = time.time()

JimDennis

#/usr/bin/env python

from __future__ import print_function
import random

list1 = list('abc') # We can expand strings into lists with this:
list2 = list1[:]    # Makes a (shallow) copy of the list

letter_counts = dict()

JimDennis

/*
7. Iterate over the "bigNums" array. 
If any number is less than 10, replace it with "x".
Return "bigNums"
HINT: You will need to "loop" over the array and check "if" the numbers are "less than" 10
Answer: This function should return ["x", 12, "x", 56, 19, "x", "x", "x", 14, 10, "x"]
*/

let bigNums = [3, 12, 7, 56, 19, 9, 1, 5, 14, 10, 2];