knbknb

# How to get docker ps data in JSON format 
# With curl version 7.40 and newer you can get data from the local unix socket, 
# and docker always runs the remote api on docker.sock.
# -----
# knbknb 2019, 2022

# list of all running Docker containers, return names only
curl -s --unix-socket /var/run/docker.sock  http://localhost/images/json | jq .[].Names

# list of all Docker images, return names (RepoTags) only

knbknb

// this simple snippet will moderately  complex after transpiling 
// https://babeljs.io/repl#?babili=false&browsers=safari%20%3E%209&build=&builtIns=false&spec=false&loose=false&code_lz=G4QwTgBA2iA0BQEnKQIwgXggFgEyxQgHoiIBiCAEwFMAzEAVwBsAXCUJh6gZwEIIAFAEtaEagFsADiwCeEAPaQGAOxq0hy6pQXKIAJQASAZQCUiQkgDGCCwDp74AObd4AXUwRa8-QJMQAPv7QEK4A3BDwQA&debug=false&forceAllTransforms=false&shippedProposals=false&circleciRepo=&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=true&presets=env&prettier=false&targets=&version=6.26.0&envVersion=1.6.2
var [a,
        b = 42,     // default values! (if empty or undefined on RHS)
        c,
      ...args
] = foo() || [ ]; 

// 
function foo(){

knbknb

## The Claas Relotius Scandal just happened to be a popular/interesting topic
## in the German news when I develeoped this code.
## (Relotius was/is a cheating journalist who made up his own stories
## to gain prizes and fame)
## Lots of people have tweeted about the story in 2018.

library(rtweet)
## search for 18000 tweets using the rstats hashtag
rt <- search_tweets(
        "#relotius", n = 100000, include_rts = FALSE

knbknb

// Grab existing  visjs DOM object on html page, change options
// knb 2018-12-08
// http://visjs.org/    Visualisation Library

// get similar id e.g. by inspecting HTML page source code that was generated by R htmlwidgets package
var = "htmlwidget-4210fec5d0f413c28b94"; 
var el = document.getElementById("graph" + widget);

var network = el.chart;

knbknb

# create pretty network-diagram of tweets,
# captured with Gephi's Twitter plugin,
# exported as JSON
# with more sophisticated filtering
# knbknb 20181209
library(visNetwork)
library(tidyverse)

workdir        <- "/home/knut/gephi/"
# infile created with "Export as ..." Feature of Gephi Desktop App

knbknb

# create pretty network-diagram of tweets,
# captured with Gephi's Twitter plugin,
# exported as JSON
# knbknb 20181218
#
library(visNetwork)
library(readr)

workdir <- "/home/knut/gephi/"
# infile created with "Export as ..." Feature of Gephi Desktop App

knbknb

Personal Notes on some Nodejs related courses, npm, and Modern Javascript

"Node.js: Getting Started"; "Advanced Node.js" by Samer Buna;

"NPM Playbook" by Joe Eames;

and other courses and tutorials

Notes

knbknb

ex0: The arrow function: (x) => 3;

ex1: var vs let

ex2: Default-values, and gather/spread 

ex3: Destructuring

ex4: Concise properties and methods, Template Strings, Tag functions

knbknb

Run the app on the command line with: node client.js. This implicitly loads server.js.

From Samir Buna's "Advanced NodeJS" course on Pluralsight

client.js

const EventEmitter = require('events');
const readline = require('readline');

const rl = readline.createInterface({

knbknb

#!/bin/bash
# noder.sh : my node repl
# load  nodejs repl with lodash preloaded
# - only for nvm users, 
# - and lodash must be installed globally
# - optional: rlwrap utility installed with e.g. apt install rlwrap
#  (if it is not installed remove rlwrap in NODE_PATH line below)
# knb 20181013
node_version=$(node -p process.versions.node);
extra_path="$HOME/.nvm/versions/node/v$node_version/lib/node_modules/";