Skip to content

Instantly share code, notes, and snippets.

Przemyslaw Mroczek Lackoftactics

Block or report user

Report or block Lackoftactics

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
View client_list.sql
EXPLAIN SELECT "customers".*,
coalesce("customer_bookings"."appointments", 0) AS "appointments",
coalesce("customer_bookings"."no_shows", 0) AS "no_shows",
"customer_bookings"."last_appointment" AS "last_appointment",
coalesce("customer_sales"."total_sales", 0) AS "total_sales",
greatest("customer_payments_accumulators"."unpaid_amount", 0) AS "outstanding",
"locations"."name" AS "last_location"
FROM "customers"
View marketing.sql
do $$
for i in 1..10 loop
INSERT INTO public.providers (name, description, address, online_booking, cancellation_policy, cancellation_time, website, contact_numbers, currency_code, country_code, time_zone, created_at, updated_at, print_receipts, receipt_message, prices_include_tax, beginning_of_week, default_calendar_view, time_slot_minutes, sms_enabled, business_type_id, widget_allows_employee_selection, widget_max_advance_time_in_months, commission_before_discount, commission_after_tax, time_format, voucher_expiration_period, locale, payments_activated, marketplace_enabled, marketplace_info, checkout_version, sale_custom_header_1, sale_custom_header_2, sale_show_customer_info, new_appointment_modal, new_appointment_summary, advance_notice_time_in_seconds, appointment_color_source, custom_invoice_title, payments_coming_soon, payments_enabled, new_taxes, sale_show_customer_address, zendesk_enabled, payments_enabled_by_provider, hidden_from_marketplace, payments_required, payment_due, new_cal
View CurrentWeather.vue
<div class="row">
{{ $t("WIND") }}:
** This ternary operator looks weird here, logic should be probably moved to function **
getWindDirection(weather.wind ? weather.wind.direction : 400)
| {{ weather.wind ? weather.wind.speed : "n/a" }}m/s
Lackoftactics / oj.rb
Created Oct 7, 2018
Big note on json parsing
View oj.rb
gem 'oj'
gem 'oj_mimic_json'
#this will make you happy
# faster json rendering using oj
View index.html
<textarea name="comment" id="comment" cols="30" row="30" style="height:60px; width:300px" placeholder="Enter your comment..."></textarea>
View &method.rb
In Ruby, &method passes you!
Most Rubyists would know what the following does.
[1, 2, 3].map(&:to_s)
It takes the array of numbers, calls to_s on each item, and returns an array of the return values.
But what if you want to do the opposite? Rather than calling a method on the object, what if you want to call a method with the object as a parameter? Simple!
["1", "2", "3"].map(&method(:Integer))
View capybara_pause.rb
def pause_capybara
$stderr.write "
Capybara paused!
App running at http://localhost:#{Capybara.current_session.server.port}
Press enter to continue..."
View rotate
You are given an n x n 2D matrix that represents an image. Rotate the image by 90 degrees (clockwise).
a = [[1, 2, 3],
[4, 5, 6],
[7, 8, 9]]
the output should be
Lackoftactics / capybara_debug.rb
Created Mar 5, 2018
Capybara easier debugging, look on browser
View capybara_debug.rb
Capybara.server_port = 9887
Capybara.app_host = "http://#{ENV['APP_HOST']}:#{Capybara.server_port}"
Capybara.always_include_port = true
Capybara.register_driver :chrome do |app|, browser: :chrome)
Lackoftactics /
Created Mar 5, 2018
Find process by port for later killing
netstat -vanp tcp | grep 3000
You can’t perform that action at this time.