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(comment "This is a small experiment inspired by Oskar Wickströms | |
excellent work at | |
https://haskell-at-work.com/episodes/2018-01-19-domain-modelling-with-haskell-data-structures.html. | |
I wanted to see what would be involved in building the equivalent | |
functionality in reasonably ideomatic Clojure. It is also my first | |
from scratch use of Clojure spec, which was a very interesting and | |
productive experience. It is amazing how little work one has to do | |
to be able to generate example datastructures for testing. The | |
generated examples helped me find a subtle bug in the tree pretty | |
printer, that would have been hard to find without." "I would love |
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FROM python:3.6-stretch as python-base | |
COPY webpack requirements.txt package.json yarn.lock ./ | |
RUN set -ex \ | |
&& apt-get update \ | |
&& apt-get install apt-transport-https \ | |
&& apt-get update \ | |
&& apt-get install --no-install-recommends -y \ | |
libpq-dev curl libjpeg-dev rsync libsass-dev libicu57 zlib1g-dev libpng-dev libmagickwand-dev \ |
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[uwsgi] | |
http = :8000 | |
http-keepalive = 1 | |
http-auto-chunked = 1 | |
wsgi-file = config/wsgi_prod.py | |
master = true | |
processes = 8 | |
threads = 2 | |
enable-threads = True | |
gid = 2000 |
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;; This is the Wikipedia entry example encoded graph. | |
(def graph {:orig [{:a 1.5 :d 2} 0] | |
:a [{:orig 1.5 :b 2} 4] | |
:b [{:a 2 :c 3} 2] | |
:c [{:b 3 :dest 4} 4] | |
:dest [{:c 4 :e 2} 0] | |
:e [{:dest 2 :d 3} 2] | |
:d [{:orig 2 :e 3} 4.5]}) | |
(defn a* [graph orig dest] |
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module Ellie.Ui.CodeEditor | |
exposing | |
( Attribute | |
, LinterMessage | |
, Position | |
, Severity(..) | |
, linterMessages | |
, mode | |
, onChange | |
, readOnly |
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(ns railway-oriented-programming | |
"An adaptation of [Railway Oriented Programming](rop) using the | |
[Cats](cats) library in Clojure. | |
[rop]: http://fsharpforfunandprofit.com/posts/recipe-part2/ | |
[cats]: https://github.com/funcool/cats" | |
(:require [cats.builtin] | |
[cats.core :as cats] | |
[cats.monad.either :as either])) |
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dependencies = [ | |
('wagtailcore', '0040_page_draft_title'), | |
('wagtailredirects', '0006_redirect_increase_max_length'), | |
('wagtailcore', '0041_group_collection_permissions_verbose_name_plural'), | |
('wagtailforms', '0003_capitalizeverbose'), | |
('taggit', '0002_auto_20150616_2121'), | |
('wagtailimages', '0019_delete_filter'), | |
] | |
The dependencies are i'm assuming referencing the old way wagtai modules were named. |
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SELECT | |
psa.datname as database, | |
psa.query as current_query, | |
clock_timestamp() - psa.xact_start AS transaction_age, | |
array_agg(distinct c.relname) AS tables_with_locks | |
FROM pg_catalog.pg_stat_activity psa | |
JOIN pg_catalog.pg_locks l ON (psa.pid = l.pid) | |
JOIN pg_catalog.pg_class c ON (l.relation = c.oid) | |
JOIN pg_catalog.pg_namespace ns ON (c.relnamespace = ns.oid) | |
WHERE psa.pid != pg_backend_pid() |
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SELECT | |
seq_scan, | |
seq_tup_read, | |
idx_scan, | |
idx_tup_fetch, | |
n_tup_ins, | |
n_tup_upd, | |
n_tup_del | |
FROM pg_catalog.pg_stat_user_tables | |
WHERE relname = '<table>'; |
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SELECT | |
relname, | |
relfilenode | |
FROM pg_catalog.pg_class | |
WHERE relname in ( | |
'<table>', | |
'<index>' | |
) | |
-- Order by oid for convenience if you're checking multiple relations. | |
ORDER BY oid; |