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seriyps / rf.erl
Last active February 1, 2018 15:43
Print erlang records as records, not tuples; print function source code
%% Prints source code of a function.
%%
%% Requires debug_info
%% Will not work for modules mocked by meck
%%
%% > io:format("~s~n", [rf:print_function(dict, new, 0)]).
%% new() ->
%% Empty = mk_seg(16),
%% #dict{empty = Empty, segs = {Empty}}.
@seriyps
seriyps / exported.erl
Created December 5, 2017 16:48
Erlang is function exported with loading
is_exported(M, F, A) ->
%% make a cheap test first to avoid unnecessary calls to code server
case erlang:module_loaded(M) of
false -> code:ensure_loaded(M);
true -> ok
end,
erlang:function_exported(M, F, A).
@seriyps
seriyps / uptime.erl
Last active April 29, 2022 08:38
Uptime of Erlang node
-export([uptime/0, uptime/1, uptime_string/0]).
%% @doc uptime in native time units
uptime() ->
erlang:monotonic_time() - erlang:system_info(start_time).
%% @doc uptime in specified time units
uptime(Unit) ->
erlang:convert_time_unit(uptime(), native, Unit).
@seriyps
seriyps / on_same_timezone.erl
Created August 21, 2015 12:48
Check if epgsql database connections are on the same timezone
% If we have some amount of PostgreSQL instances and want to transfer data between them,
% in case when model has 'timeatamp' fields, we should check that both instances configured with the
% same timezone
on_same_timezone(Connections) ->
Tests =
[%% Check using TimeZone connection parameter
{fun(Conn) ->
{ok, TZ} = pgsql:get_parameter(Conn, <<"TimeZone">>),
TZ
@seriyps
seriyps / tcp_server.rs
Last active November 17, 2022 10:08
Simple concurrent TCP echo server (rust 0.11)
#![feature(phase)]
#[phase(plugin, link)] extern crate log;
extern crate green;
extern crate rustuv;
use std::io;
use std::os;
use std::io::{Listener,Acceptor,TcpStream};
#[start]
@seriyps
seriyps / erlydtl_xgettext.erl
Last active August 29, 2015 14:01
.po file generator from erlydtl templates
%% Usage:
%% TemplatesDir = "templates",
%% TemplatesNames = ["index.dtl", "_layout.dtl"], % filelib:wildcard("*.dtl", TemplatesDir)
%% LocalesDir = "locales",
%% Domain = "my_project", % phrases will be written to "locales/my_project.pot"
%% Messages = extract_messages(TemplatesDir, TemplatesNames),
%% write_pot(Messages, LocalesDir, Domain).
-module(erlydtl_xgettext).
@seriyps
seriyps / microlisp.py
Created April 11, 2014 14:00
Lisp subset interpreter
# -*- coding: utf-8 -*-
'''
Created on 2014-04-05
@author: Sergey Prokhorov <me@seriyps.ru>
'''
import re
import operator
import decimal
@seriyps
seriyps / mo_parser.erl
Created September 2, 2013 23:23
Gettext .mo format parser for Erlang
%%% @author Sergey Prokhorov <me@seriyps.ru>
%%% @copyright (C) 2013, Sergey Prokhorov
%%% @doc
%%% Simple gettext .mo file format parser for Erlang.
%%%
%%% Produce [{KeyPlurals::[binary()], TransPlurals::[binary()]}] orddict as
%%% output.
%%% Eg, for .po file (converted to .mo)
%%% <pre>
%%% msgid "Download"
@seriyps
seriyps / email.erl
Last active November 6, 2022 02:03
Send emails using Erlang gen_smtp shortcut.
% Send plaintext email using gen_smtp https://github.com/Vagabond/gen_smtp
% This function sends email directly to receiver's SMTP server and don't use MTA relays.
%
% Example plaintext email:
% Mail = mail_plain(<<"Bob <sender@example.com>">>, <<"Alice <receiver@example.com>">>, <<"The mail subject">>, <<"The mail body">>),
% send_email(Mail).
%
% Example email with image attachment:
% ImgName = "image.jpg",
% {ok, ImgBin} = file:read_file(ImgName),
@seriyps
seriyps / decode_wordstat.erl
Created August 7, 2013 15:49
Yandex wordstat encrypted AJAX decoder for Python and Erlang
decode_data(Data, UserAgent, Fuid01) ->
Key = iolist_to_binary([binary:part(UserAgent, 0, min(25, size(UserAgent))),
Fuid01,
<<"I keep watch over you ;)">>]),
decode_chars(Data, Key, 0).
decode_chars(<<>>, _, _) ->
<<>>;
decode_chars(<<Char:8, Rest/binary>>, Key, Idx) ->
KeyPos = Idx rem size(Key),