ttsiodras

   #
   # I inherited a large code base, where hundreds of code paths end up
   # calling "common_function_called_in_gazillion_places". 
   #
   # And the need arose for this function to access the HTTP request's
   # headers... 
   #
   # What to do? Refactor all the places leading up to here? In a dynamically
   # typed language, with no compiler to tell us the places to refactor?
   #

ttsiodras

#!/usr/bin/env python
"""Mixpanel event importer

Usage:
    mp_import_evts.py -c configFile -t token -a api_key -i fname -d delta
    mp_import_evts.py (-h | --help)
    mp_import_evts.py --version

Options:
    -c configFile   config file with settings

ttsiodras

I code for a living - for two decades, now. And UNIX is in my blood.

I have therefore (naturally) installed Termux on my Android phone, and use it to spawn sshd - a very useful process when your ISP connection fails you, since you get to use the phone's internet connection (via ssh -D 1080 ... and configuring Firefox to use localhost:1080 as SOCKS proxy). This does not depend on your contract allowing hotspot-ing or not - it's close to bullet-proof.

Yesterday I ssh-ed in the phone, looking around and checking out the Android environment - and I see Termux's ps aux return among others .... /system/xbin/dropboxd.

What the heck - I never installed Dropbox on my phone!

It does not appear in the list of installed apps, either - and is naturally not removable, since I am not root.

ttsiodras

Below is my understanding of affine types and how they help us in Rust (unsure if I got this right - please correct if I am talking nonsense).

The issue is... How can we use the power of a type system so a compiler will block us from doing this wrong sequence of calls?

FILE *fp = NULL;
fclose(fp);
fp = fopen("...");

An idea is to "mirror" the states that the file variable goes through (unused/closed, opened) in the type system:

ttsiodras

Annotating my python code with type annotations (for the magnificent mypy), I had to do stuff like this:

find . -type f -iname \*A_mapper.py | while read ANS ; do
    cat "$ANS" | \
        sed 's/def OnBasic(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnBasic(\1: str, \2: AsnBasicNode, \3: AST_Leaftypes) -> None:/' | \
        sed 's/def OnChoice(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnChoice(\1: str, \2: AsnChoice, \3: AST_Leaftypes) -> None:/' | \
        sed 's/def OnSequence(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnSequence(\1: str, \2: AsnSequenceOrSet, \3: AST_Leaftypes) -> None:/' | \
        sed 's/def OnSet(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnSet(\1: str, \2: AsnSequenceOrSet, \3: AST_Leaftypes) -> None:/' | \
        sed 's/def OnSequenceOf(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnSequenceOf(\1: str, \2: AsnSequenceOrSetOf, \3: AST_Leaftypes) -> None:/' | \

sed 's/def OnSetOf(([^,:]), ([^,:]), ([^,:]*)):$/def OnSetOf(\1: str, \2: AsnS

ttsiodras

I just finished adding type annotations to a 10-year old python codebase (for type-checking with the magnificent mypy).

I had to do stuff like this:

find . -type f -iname \*A_mapper.py | while read ANS ; do
    cat "$ANS" | \
        sed 's/def OnBasic(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnBasic(\1: str, \2: AsnBasicNode, \3: AST_Leaftypes) -> None:/' | \
        sed 's/def OnChoice(\([^,:]*\), \([^,:]*\), \([^,:]*\)):$/def OnChoice(\1: str, \2: AsnChoice, \3: AST_Leaftypes) -> None:/' | \

sed 's/def OnSequence(([^,:]), ([^,:]), ([^,:]*)):$/def OnSequence(\1: str, \2: AsnSequenceOrSet, \3: AST_Leaftypes) -> None:/' | \

ttsiodras

#!/usr/bin/env python3

# Based on a great article from Eli Bendersky:
#
#     http://eli.thegreenplace.net/2009/08/29/co-routines-as-an-alternative-to-state-machines/
#
# I just "ported" to Python3 (still using plain old yield) and added the proper type annotations,
# since Python 3.5 can now support them (and mypy can check them):
#
#      $ mypy --disallow-untyped-defs protocol_via_coroutines.py 

ttsiodras

# In relation to the discussion taking place at
# http://stackoverflow.com/questions/44097324/timing-of-makefile-include-statements-for-auto-generated-files/44103228

# OK, since I can't use PHONY to force the rebuild of piped.mk
# without losing the re-inclusion itself, I will just delete the file
# directly after using it (and thus force it to be re-created each
# time, as intended, without using .PHONY).

$ cat Makefile
all:    piped.mk

ttsiodras

/////////////////////////////////////////////////////////////////////////////
//
// I designed a small circuit playing the Monkey Island songs via a buzzer
// and an Arduino pro mini:  
//
//    https://www.youtube.com/watch?v=9FKhpKlKFoc
//
// I first collected the song data by hacking the source code of DOSBOX, 
// and playing the game a bit while gathering the frequencies... 
//

ttsiodras

$ find py/ leon-common/ extmod/ -type f -iname '*.[ch]' -exec grep -ow 'rtems_[a-zA-Z0-9_-]*' '{}' ';' | sort -u | grep -v _obj

rtems_attribute
rtems_build_name
rtems_clock_get
rtems_clock_time_value
rtems_id
rtems_interval
rtems_message_queue_broadcast
rtems_message_queue_create