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ABC always be codin!

Michael Reinstein mreinstein

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ABC always be codin!
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mreinstein / index.md
Created August 2, 2017 17:15
determine the TCP port on which a node.js program listens

Find the pid of the running process if you don't know it:

$ ps ax | grep node
1012 ?        Ssl    0:03 node /usr/bin/signalhub listen -p 8000

In this case we're running a node program and it's pid is 1012

@mreinstein
mreinstein / css-color-invert.js
Last active March 4, 2024 18:45
invert all colors on a web page
// invert all colors on the page
export default function invert() {
let css = 'html {-webkit-filter: invert(100%);' +
'-moz-filter: invert(100%);' +
'-o-filter: invert(100%);' +
'-ms-filter: invert(100%); }',
head = document.getElementsByTagName('head')[0],
style = document.createElement('style')
if (!window.counter) {
@mreinstein
mreinstein / transform-javascript.js
Created February 18, 2020 10:40
parse javascript from stdin as an AST and remove specific functions by name
import escodegen from 'escodegen'
import esprima from 'esprima'
import estraverse from 'estraverse'
let src = ''
process.stdin.on('data', function (chunk) {
src += chunk
})
function createDiscreteProblem () {
return {
allAssignments: [ ],
variables: { },
constraints: [ ]
}
}
@mreinstein
mreinstein / resize-tiled-map.js
Created June 19, 2020 00:36
resize the tileset used by a tiled map, preserving the col, row locations
let level = require('./level.js')
// given a tiled level that references a tileset of certain dimensions, update to a tileset of different dimensions
let idx = -1
const locations = [ ]
do {
@mreinstein
mreinstein / consolidate-media.md
Last active May 16, 2022 03:49
script to consolidate and clean up media on my computer

media-consolidator

script to consolidate and clean up media on my computer

# copy all known places where photos exist to input/
# preserve metadata when doing the copy (modification timestamps, etc.)
cp -rp ~/Pictures/* input/
cp -rp ~/Documents/Photos/* input/ 
@mreinstein
mreinstein / downscale.sh
Created February 3, 2021 04:25
downscale images
brew install imagemagick
mogrify -resize 50% -format png *
brew install ffmpeg --with-fdk-aac
ffmpeg -i movie.avi movie.mp4
@mreinstein
mreinstein / dimensions.sh
Created April 4, 2022 03:22
ffmpeg - determine video dimensions
ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 input.mp4
@mreinstein
mreinstein / resize.sh
Created April 4, 2022 03:23
ffmpeg - resize video
# resize
ffmpeg -i input.mp4 -vf scale=1920:1080 output.mp4
# resize with high quality
ffmpeg -i input.mp4 -vf scale=1920:1080 -preset slow -crf 18 output.mp4