-
When writing a string of multiple utility classes, always do so in an order with meaning. The "Concentric CSS" approach works well with utility classes (i.e,. 1. positioning/visibility 2. box model 3. borders 4. backgrounds 5. typography 6. other visual adjustments). Once you establish a familiar pattern of ordering, parsing through long strings of utility classes will become much, much faster so a little more effort up front goes a long way!
-
Always use fewer utility classes when possible. For example, use
mx-2
instead ofml-2 mr-2
and don't be afraid to use the simplerp-4 lg:pt-8
instead of the longer, more complicatedpt-4 lg:pt-8 pr-4 pb-4 pl-4
. -
Prefix all utility classes that will only apply at a certain breakpoint with that breakpoint's prefix. For example, use
block lg:flex lg:flex-col lg:justify-center
instead ofblock lg:flex flex-col justify-center
to make it very clear that the flexbox utilities are only applicable at the
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defmodule TravelerWeb.SearchbarLive do | |
use TravelerWeb, :live_view | |
alias Phoenix.LiveView.JS | |
alias Traveler.Places | |
def mount(_params, _session, socket) do | |
socket = assign(socket, places: []) | |
{:ok, socket, layout: false} | |
end |
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DUMP | |
// pod-name name of the postgres pod | |
// postgres-user database user that is able to access the database | |
// database-name name of the database | |
kubectl exec [pod-name] -- bash -c "pg_dump -U [postgres-user] [database-name]" > database.sql | |
RESTORE | |
// pod-name name of the postgres pod | |
// postgres-user database user that is able to access the database | |
// database-name name of the database |
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FROM elixir:1.4.5 as asset-builder-mix-getter | |
ENV HOME=/opt/app | |
RUN mix do local.hex --force, local.rebar --force | |
# Cache elixir deps | |
COPY config/ $HOME/config/ | |
COPY mix.exs mix.lock $HOME/ | |
COPY apps/myproject_web/mix.exs $HOME/apps/myproject_web/ | |
COPY apps/myproject_web/config/ $HOME/apps/myproject_web/config/ |
This is a collection of the most common commands I run while administering Postgres databases. The variables shown between the open and closed tags, "<" and ">", should be replaced with a name you choose. Postgres has multiple shortcut functions, starting with a forward slash, "". Any SQL command that is not a shortcut, must end with a semicolon, ";". You can use the keyboard UP and DOWN keys to scroll the history of previous commands you've run.
http://www.postgresql.org/download/linux/ubuntu/ https://help.ubuntu.com/community/PostgreSQL
Magic words:
psql -U postgres
Some interesting flags (to see all, use -h
or --help
depending on your psql version):
-E
: will describe the underlaying queries of the\
commands (cool for learning!)-l
: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
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# Elixir v1.0 | |
defmodule Rules do | |
defmacro __using__(_) do | |
quote do | |
import unquote(__MODULE__) | |
@before_compile unquote(__MODULE__) | |
@rules [] | |
end | |
end |
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-- 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%' |