Lackoftactics

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"
LEFT OUTER JOIN
  (SELECT COUNT(*) FILTER(

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do $$
  begin
    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

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 <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
              </div>

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gem 'oj'
gem 'oj_mimic_json'

#this will make you happy
# faster json rendering using oj

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 <textarea name="comment" id="comment" cols="30" row="30" style="height:60px; width:300px" placeholder="Enter your comment..."></textarea>

Lackoftactics

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))

Lackoftactics

def pause_capybara
    $stderr.write "
      Capybara paused!
      App running at http://localhost:#{Capybara.current_session.server.port}
      Press enter to continue..."
    $stdin.gets
end

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You are given an n x n 2D matrix that represents an image. Rotate the image by 90 degrees (clockwise).

Example

For

a = [[1, 2, 3],
     [4, 5, 6],
     [7, 8, 9]]
the output should be

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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|
  Capybara::Selenium::Driver.new(app, browser: :chrome)
end

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netstat -vanp tcp | grep 3000