Mark Fox mfdj

Alphabetize your set items and map keys

This document looks at certain data-structures and makes the case for alphanumeric ordering to optimize developer experience (DX).

Strategies for organizing code

Authoring code, like all language, is about expressing ideas intentionally and legibly. Obviously code needs to be correct for the computational device, and succeed as a software product, but we also want to make it comprehensible to human colleagues.

To make code comprehensible I can identify four distinct organizational strategies:

Pure ESM package

The package that linked you here is now pure ESM. It cannot be require()'d from CommonJS.

This means you have the following choices:

Use ESM yourself. (preferred)
Use import foo from 'foo' instead of const foo = require('foo') to import the package. You also need to put "type": "module" in your package.json and more. Follow the below guide.
If the package is used in an async context, you could use await import(…) from CommonJS instead of require(…).
Stay on the existing version of the package until you can move to ESM.

so, why is oil's price negative?

(note: I am a software developer who has an interest in finance. This is my understanding. I am not a professional.)

first, what does that even mean? so, the "price of oil" is the price of "WTI Crude", which is a specific kind of oil. There are multiple kinds of oil with multiple prices.

Why is it negative? to understand this, we also have to understand why WTI is the price of oil: that is, it's the kind of oil that underpins the New York Mercantile Exchange's oil futures contracts. The NYMEX is kind of like the stock market, but for commodities, aka stuff.

Setting up Jest with ESM

Here are some different ways on how to set up Jest to support ESM. This applies for Jest v25, Node v13, and Babel v7.

Method A: Native Node.js support

Node v14 and Jest v26 support ESM natively with the --experimental-vm-modules flag.

Install cross-env:

Client:

username = "alice"
secretKey = "12345"
method = GET
url = "https://example.com/private"

Client sends what it essentially this HTTP request:
method = GET
URL = "https://example.com/private"

Workaround

Register the custom repostory as homebrew tap

~ $ TAP=appkr/homebrew-repo
~ $ brew tap $TAP

Install the binary from the custom repository AS USUAL

Ctrl + Alt + Space

	/*
	fetch('http://example.com')
	.then(res => res.ok ? logReadableStream(res.body) : Promise.reject(`Status: ${res.status}`))
	.catch(console.log)
	*/
	let logReadableStream = function (stream) {
	const reader = stream.getReader();
	let bytesReceived = 0;
	let result = new Uint8Array(0);

	#!/usr/bin/env sh

	vagrant=$(which vagrant)
	awk=$(which awk)

	printf "Gathering a list of machines. "
	machines=$(vagrant global-status --prune 2>/dev/null \| $awk '/running/ {print $5}')

	if [ ! -z "${machines[@]}" ]
	then

	#!/bin/bash

	set -eo pipefail

	semver_regex="^(0\|[1-9][0-9])\.(0\|[1-9][0-9])\.(0\|[1-9][0-9])(\-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+))?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$"

	usage="\
	Usage:
	$0
	$0 show