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Clojure Development Setup

Install packages

brew install openjdk rlwrap clojure leiningen borkdude/brew/babashka babashka/brew/neil visual-studio-code

Install tools

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(╯°□°）╯︵ ┻━┻

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Github Styles

Important

A message here.

---

Note

A message here.

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(ns myapp.shutdown-hook
  (:gen-class))

(defn add-shutdown-hook!
  "Adds a shutdown hook that executes the given function when the JVM is shutting down."
  [f]
  (.addShutdownHook
   (Runtime/getRuntime)
   (new Thread ^Runnable f)))

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Clojurescript Hello World

A hello world with Clojurescript+shadow-cljs+reagent.

• shadow-cljs: A developer tool that provides development builds, hot loading dev web server, and more.
• reagent: An interface to react. Create complicated react components with less verbosity and using mostly just Clojurescript functions.

Pre-reqs

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# Until boto3 adds sync capability, we are stuck with subprocess or module hacks like this.
# original author: https://github.com/boto/boto3/issues/358#issuecomment-372086466
import os
from awscli.clidriver import create_clidriver

def aws_cli(*cmd):
    old_env = dict(os.environ)
    try:
        # Environment
        env = os.environ.copy()

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DO $$
DECLARE
i TEXT;
BEGIN
  FOR i IN (
    SELECT 'SELECT SETVAL('
        || quote_literal(quote_ident(PGT.schemaname) || '.' || quote_ident(S.relname))
        || ', COALESCE(MAX(' ||quote_ident(C.attname)|| '), 1) ) FROM '
        || quote_ident(PGT.schemaname)|| '.'||quote_ident(T.relname)|| ';'
      FROM pg_class AS S,

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-- List all sequences and their current values, excluding system schemas
SELECT 
    n.nspname as schema,
    s.relname as sequence_name,
    t.relname as table_name,
    a.attname as column_name,
    pg_sequence_last_value(s.oid) as last_value
FROM pg_class s
JOIN pg_namespace n ON n.oid = s.relnamespace
JOIN pg_depend d ON d.objid = s.oid 

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Git: Pull Request CLI

Some github cli example commands to open pull requests.

Remove --dry-run to create.

With a Template

Opens a pull reqest to merge SOURCEBRANCH into DESTBRANCH, using a markdown formatted template for the body.

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Git: Checkout a single directory from a git repo

Setup Directory

mkdir myrepo && cd myrepo
git init

Configure Repo