Maciej Bołtromiuk bliheris

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https://twitter.com/snookca/status/1073299331262889984?s=21

‪“‬In what way is JS any more maintainable than CSS? How does writing CSS in JS make it any more maintainable?”

‪Happy to chat about this. There’s an obvious disclaimer that there’s a cost to css-in-js solutions, but that cost is paid specifically for the benefits it brings; as such it’s useful for some usecases, and not meant as a replacement for all workflows. ‬

‪(These conversations always get heated on twitter, so please believe that I’m here to converse, not to convince. In return, I promise to listen to you too and change my opinions; I’ve had mad respect for you for years and would consider your feedback a gift. Also, some of the stuff I’m writing might seem obvious to you; I’m not trying to tell you if all people of some of the details, but it might be useful to someone else who bumps into this who doesn’t have context)‬

So the big deal about css-in-js (cij) is selectors.

This API was removed in React 17

Interaction tracing with React

React recently introduced an experimental profiler API. After discussing this API with several teams at Facebook, one common piece of feedback was that the performance information would be more useful if it could be associated with the events that caused the application to render (e.g. button click, XHR response). Tracing these events (or "interactions") would enable more powerful tooling to be built around the timing information, capable of answering questions like "What caused this really slow commit?" or "How long does it typically take for this interaction to update the DOM?".

With version 16.4.3, React added experimental support for this tracing by way of a new NPM package, scheduler. However the public API for this package is not yet finalized and will likely change with upcoming minor releases, so it should be used with caution.

Some things that are "better" with this BetterPromise implementation:

BetterPromise # then(..) accepts a BetterPromise (or Promise) instance passed directly, instead of requiring a function to return it, so that the promise is linked into the chain.
```
var p = BetterPromise.resolve(42);

var q = Promise.resolve(10);

p.then(console.log).then(q).then(console.log);
```

Strings

`String.prototype.*`

None of the string methods modify this – they always return fresh strings.

charAt(pos: number): string ^ES1

Returns the character at index pos, as a string (JavaScript does not have a datatype for characters). str[i] is equivalent to str.charAt(i) and more concise (caveat: may not work on old engines).

#Setting up Nginx on Your Local System ###by Keith Rosenberg

##Step 1 - Homebrew The first thing to do, if you're on a Mac, is to install homebrew from http://mxcl.github.io/homebrew/

The command to type into terminal to install homebrew is:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

	import { Maybe } from './maybe'

	describe('Maybe', () => {
	it('should handle a value', () => {
	const maybe = Maybe.some('test')
	expect(maybe.getOrElse('')).toBe('test')
	})

	it('should handle an undefined value', () => {
	const maybe = Maybe.fromValue<string>(undefined)

	import okhttp3.*;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import javax.net.ssl.*;
	import java.net.*;
	import java.security.cert.CertificateException;

	/*
	okhttp version used 3.8.1

	var AWS = require('aws-sdk'),
	fs = require('fs');

	// For dev purposes only
	AWS.config.update({ accessKeyId: '...', secretAccessKey: '...' });

	// Read in the file, convert it to base64, store to S3
	fs.readFile('del.txt', function (err, data) {
	if (err) { throw err; }