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#Quick Guide sudo atsutil databases -remove

atsutil server -shutdown

atsutil server -ping

#Extended Guide from http://doc.extensis.com/Font-Management-in-OSX-Best-Practices-Guide.pdf

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# Create a new repository on the command line
 
touch README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin https://github.com/c0ldlimit/vimcolors.git
git push -u origin master
 
# Push an existing repository from the command line

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Download Audio from YouTube

-i - ignore errors

-c - continue

-t - use video title as file name

--extract-audio - extract audio track

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// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: green; icon-glyph: file-code;
const getModule = importModule("getModule");

const documentDirectory = FileManager.iCloud().documentsDirectory();

module.exports = async ({ moduleName, url, forceDownload = false }) => {
  if (moduleExists(moduleName) && !forceDownload) {
    return importModule(moduleName);

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// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: green; icon-glyph: file-code;
const getString = importModule('getString');

const documentDirectory = FileManager.iCloud().documentsDirectory();

const header = `// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: deep-gray; icon-glyph: file-code;`;

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// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: green; icon-glyph: file-code;
module.exports = async ({ url, headers = {} }) => {
  const request = new Request(url);
  request.method = methods.get;
  request.headers = {
    ...headers
  };
  return await request.loadString();

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// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: green; icon-glyph: file-code;
module.exports = {
  post: async ({ url, body, headers = {} }) => {
    const request = new Request(url);
    request.body = JSON.stringify(body);
    request.method = methods.post;
    request.headers = {
      ...defaultHeaders,

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Data Structures

Dictionaries

A set of n records, each identified by one or more key fields.

Problem: Efficiently locate, insert and delete the record associated with any query key q.

Data structures include hash tables, skip lists and balanced/unbalanced binary search trees.

Representations

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function Timer() {
  const startTime = React.useRef(performance.now());
  const [time, setTime] = React.useState(performance.now());
  React.useEffect(() => {
    const id = setTimeout(() => {
      ReactDOM.flushSync(() => {
        setTime(performance.now());
      });
    }, 2);

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Making Javascript faster

This is a list of guidelines to make your Javascript faster, often associated with jsPerf benchmarks.

Profile before optimizing

If you have an existing codebase, don't get carried away with premature optimizations. Profile to find the slow bits and pick the low hanging fruit.

Some of the latter lessons in Code School's Chrome DevTools course will teach you how to profile your code.