seriyps

% 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

-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

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

%% 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

%%% @author sergey <me@seriyps.ru>
%%% @copyright (C) 2018, sergey
%%% @doc
%%% Given a liast of resources M and list of users N, N > M;
%%% Any resourse might be acquired by one or more users (by request from user).
%%% There is no bound on how many users can acquire single resource.
%%% User may release resource at any time.
%%% User must get resource that is used by least amount of other users.
%%% @end
%%% Created :  8 Oct 2018 by sergey <me@seriyps.ru>

seriyps

#!/bin/bash
# Automatic interactive installer for mtproto proxy https://github.com/seriyps/mtproto_proxy
# Supported OS:
# - Ubuntu 18.xx
# - Ubuntu 19.xx
# - Ubuntu 20.xx
# - Ubuntu 21.xx
# - Ubuntu 22.xx
# - Debian 11 bullseye
# - Debian 10 buster

seriyps

-module(proper_json).

-export([json/0, json/1]).

json() ->
  ?SIZED(Size, json(Size)).


json(0) ->
  j_literal();

seriyps

%% Single-roundtrip version of epgsql:equery/3
%%
%% It does parse-bind-execute sequence in 1 network roundtrip.
%% The cost is that user should manually provide the datatype information for
%% each bind-parameter.
%% Another potential problem is that connection will crash if epgsql does not
%% have a codec for any of result columns. Explicit type casting may save you
%% in this case: `SELECT my_enum::text FROM my_tab'. Or you can implement the
%% codec you need.
%%

seriyps

$ rebar3 dialyzer                                                                                                                                                                    [15:33:30]
===> Verifying dependencies...
===> Compiling mylib
===> Dialyzer starting, this may take a while...
===> Updating plt...
===> Resolving files...
===> Checking 202 files in "sandbox/mylib/_build/default/rebar3_23.0_plt"...
===> Doing success typing analysis...
===> Resolving files...
===> Analyzing 2 files with "sandbox/mylib/_build/default/rebar3_23.0_plt"...

seriyps

%% Version of epgsql:equery/3 that uses named statements and caches them in process dictionary
%%
%% Algorithm pseudocode is:
%% <pre>
%% stmt = cache_get(name)
%% if not stmt:
%%    stmt = parse_and_describe(name, sql)  # network roundtrip
%%    cache_put(name, stmt)
%% return bind_and_execute(stmt, params)    # network roundtrip
%% </pre>