zelark

Hexagonal Architecture

Conceptualized by Alistair Cockburn. Also known as "Ports and Adapters".

In a nutshell:

Application Driver -> Primary Adapter -> Primary Port -> Use Case -> Secondary Port -> Secondary Adapter -> External System/Side Effect

zelark

#!/usr/bin/env python3
"""
License: MIT License
Copyright (c) 2023 Miel Donkers

Very simple HTTP server in python for logging requests
Usage::
    ./server.py [<port>]
"""
from http.server import BaseHTTPRequestHandler, HTTPServer

zelark

Set up Jekyll environment on macOS

Set p Ruby, Bundler and a project-level Jekyll on macOS Catalina and up

This guide is for macOS Catalina and is based on the Jekyll on macOS doc and my experience.

1. Install dev tools

Use the XCode CLI to install dev tools. Recommended so that you can install native extensions when installing gems.

zelark

  (defn take-first-sorted-by
    "Performs the same result as (take n (sort-by keyfn comp coll))
     but more efficient in terms of time and memory"
    ([n keyfn coll] (take-first-sorted-by n keyfn compare coll))
    ([n keyfn ^java.util.Comparator comp coll]
     (if (pos? n)
       (let [m ^java.util.TreeMap (java.util.TreeMap. comp)
             m-size (volatile! 0)
            ;;  if it is guaranteed that (keyfn v) will be unique for all v in coll
            ;;  we can attach :unique? key to keyfn meta and algorythm will use single val map

zelark

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

• The link below in the summary jumps at the answer on this page.
• The link on the question itself points back at the original post.

Summary

zelark

package parse;

import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.File;
import java.io.IOException;

zelark

(ns react-fun.part1)

;;Deconstructing React




;;   v = f (d)

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----- Esc -----
Quick change directory: Esc + c
Quick change directory history: Esc + c and then Esc + h
Quick change directory previous entry: Esc + c and then Esc + p
Command line history: Esc + h
Command line previous command: Esc + p
View change: Esc + t (each time you do this shortcut a new directory view will appear)
Print current working directory in command line: Esc + a
Switch between background command line and MC: Ctrl + o
Search/Go to directory in active panel: Esc + s / Ctrl + s then start typing directory name

zelark

#!/usr/bin/env bash

size=1024 # MB
mount_point=$HOME/tmp
name=$(basename "$mount_point")

usage() {
  echo "usage: $(basename "$0") [mount | umount | remount | check | orphan]" \
    "(default: mount)" >&2
}

zelark

from bottle import route, run, install
from bottle_sqlite import SQLitePlugin

install(SQLitePlugin(dbfile='bottle.db'))

@route('/db/')
def database(db):
    data = db.execute('SELECT SQLITE_VERSION()').fetchone()
    print "SQLite version: %s" % data