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Oleg Sovetnik sovetnik

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@rgreenjr
rgreenjr / postgres_queries_and_commands.sql
Last active May 14, 2025 00:29
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
@dinnouti
dinnouti / _form.html.erb
Created October 15, 2012 22:59
Typeahead / Autocomplete with Twitter Bootstrap, Rails, simple_form
<%= f.input :nome, :collection => get_schools_name, :include_blank => false, :input_html => {:rel => 'autocomplete', :data_default => @school.nome} %>
@m3nd3s
m3nd3s / NERDTree.mkd
Last active November 23, 2023 13:45
My Vim Cheat Sheet

NERDTree

o.......Open files, directories and bookmarks....................|NERDTree-o|
go......Open selected file, but leave cursor in the NERDTree.....|NERDTree-go|
t.......Open selected node/bookmark in a new tab.................|NERDTree-t|
T.......Same as 't' but keep the focus on the current tab........|NERDTree-T|
i.......Open selected file in a split window.....................|NERDTree-i|
gi......Same as i, but leave the cursor on the NERDTree..........|NERDTree-gi|
s.......Open selected file in a new vsplit.......................|NERDTree-s|
gs......Same as s, but leave the cursor on the NERDTree..........|NERDTree-gs|

O.......Recursively open the selected directory..................|NERDTree-O|

@bearfact
bearfact / bootstrap_form.js
Last active May 7, 2020 17:50
A simple jquery function for submitting twitter bootstrap forms with ajax and populating error messages. This expects some twitter bootstrap conventions but keeps be from rewriting the same ajax javascript a dozen times per app.
(function($){
$.fn.bootstrapForm = function(options){
var options = $.extend({
submit_button: 'button[type="submit"], input[type="submit"]',
model_name: '',
show_errors: true
},options);
return this.each(function() {
var form = $(this);
@wteuber
wteuber / encrypt_decrypt.rb
Last active April 30, 2025 19:20
Simply encrypt and decrypt Strings in Ruby.
require 'openssl'
class String
def encrypt(key)
cipher = OpenSSL::Cipher.new('DES-EDE3-CBC').encrypt
cipher.key = Digest::SHA1.hexdigest key
s = cipher.update(self) + cipher.final
s.unpack('H*')[0].upcase
end
@PWSdelta
PWSdelta / rspec_model_testing_template.rb
Last active March 11, 2025 21:14
Rails Rspec model testing skeleton & cheat sheet using rspec-rails, shoulda-matchers, shoulda-callbacks, and factory_girl_rails. Pretty much a brain dump of examples of what you can (should?) test in a model. Pick & choose what you like, and please let me know if there are any errors or new/changed features out there. Reddit comment thread: http…
# This is a skeleton for testing models including examples of validations, callbacks,
# scopes, instance & class methods, associations, and more.
# Pick and choose what you want, as all models don't NEED to be tested at this depth.
#
# I'm always eager to hear new tips & suggestions as I'm still new to testing,
# so if you have any, please share!
#
# @kyletcarlson
#
# This skeleton also assumes you're using the following gems:
@tashman
tashman / favicons
Created September 5, 2013 17:58
favicon installation for Ruby on Rails apps (application.html.erb)
<!-- For third-generation iPad with high-resolution Retina display: -->
<!-- Size should be 144 x 144 pixels -->
<%= favicon_link_tag 'apple-touch-icon-144x144-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '144x144' %>
<!-- For iPhone with high-resolution Retina display: -->
<!-- Size should be 114 x 114 pixels -->
<%= favicon_link_tag 'apple-touch-icon-114x114-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '114x114' %>
<!-- For first- and second-generation iPad: -->
<!-- Size should be 72 x 72 pixels -->
@rgs
rgs / falsehood-prices.md
Last active May 13, 2025 16:34

Falsehoods programmers believe about prices

  1. You can store a price in a floating point variable.
  2. All currencies are subdivided in 1/100th units (like US dollar/cents, euro/eurocents etc.).
  3. All currencies are subdivided in decimal units (like dinar/fils)
  4. All currencies currently in circulation are subdivided in decimal units. (to exclude shillings, pennies) (counter-example: MGA)
  5. All currencies are subdivided. (counter-examples: KRW, COP, JPY... Or subdivisions can be deprecated.)
  6. Prices can't have more precision than the smaller sub-unit of the currency. (e.g. gas prices)
  7. For any currency you can have a price of 1. (ZWL)
  8. Every country has its own currency. (EUR is the best example, but also Franc CFA, etc.)
@sauloperez
sauloperez / signal_catching.rb
Last active December 14, 2024 13:43
How to catch SIGINT and SIGTERM signals in Ruby
# Signal catching
def shut_down
puts "\nShutting down gracefully..."
sleep 1
end
puts "I have PID #{Process.pid}"
# Trap ^C
Signal.trap("INT") {
@suryart
suryart / application.html.erb
Last active October 26, 2023 00:16
Rails 4 flash messages using Twitter Bootstrap(bootstrap-sass: https://github.com/thomas-mcdonald/bootstrap-sass). An improved version of https://gist.github.com/roberto/3344628
// layout file
<body>
<div class="container">
<%= flash_messages %>
<%= yield %>
</div><!-- /container -->
</body>