Beni Cherniavsky-Paskin cben

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

Based on an example for Elvish.

From comment posted to HN:

I love the structured pipes, but as mentioned in another discussion, replacing the shell is a big leap for a lot of people. And you can get quite far without it with tools like "jq". And when I saw this, I just had to tinker a bit to see what I could do with Ruby, based on the example on the homepage:

$ curl -s https://api.github.com/repos/elves/elvish/issues | jr 'each{|issue| puts "#{issue["number"]}: #{issue["title"]}"} ' | head -n 11

Or (I expect pitchforks when you see the implementation for this):

Run Cisco Webex on 64-bit Ubuntu 16.04

With Audio and Screen Sharing Enabled

Enable support for 32-bit executables

Add the i386 architecture to the list of dpkg architectures :

sudo dpkg --add-architecture i386

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2025-03-24: Commenting is disabled permanently. Previous comments are archived at web.archive.org. ]

Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

The Story of NPM and Yarn

In the beginning there was NPM, and for a time it was good. Packages went forth and multiplied. The New Gods proclaimed the great demon Dependency Management had been slain. But The Old Gods knew better, for they had seen much and knew that the demon can never be killed, only held at bay.

The Old Gods were ignored. In the folly of a young age grew an abundance of packages and with them grew the scourge of dependency. In the depths beneath the earth, in a place beyond memory, the great demon stirred.

The first sign something was wrong was non-deterministic package version mismatches. “This is fine!” The New Gods declared. “A temporary setback, nothing more! We can fix it.” And so they introduced shrinkwrap, a lamp to combat the growing darkness.

But it proved to be too little, too late, and dusk continued to fall. The New Gods suffered their first major defeat at the [Battle of Left-pad](https://www.theregister.co.uk/2016/03/23/npm_left_

	import {run} from '@cycle/run';
	import {makeCanvasDriver, rect, text} from 'cycle-canvas';
	import { makeKeyboardDriver } from 'cycle-keyboard'

	import onionify from 'cycle-onionify';
	import {makeCollection} from 'cycle-onionify';
	import isolate from '@cycle/isolate'

	import xs from 'xstream'
	import fromEvent from 'xstream/extra/fromEvent'

	#!/usr/bin/env bash
	# memusg -- Measure memory usage of processes
	# Usage: memusg COMMAND [ARGS]...
	#
	# Author: Jaeho Shin <netj@sparcs.org>
	# Created: 2010-08-16
	############################################################################
	# Copyright 2010 Jaeho Shin. #
	# #
	# Licensed under the Apache License, Version 2.0 (the "License"); #

	#!/bin/bash

	# Open a series of web browsers with the list of PRs slated to review in various Github repositories.
	# See _main function at the end.

	CLIENT_KEY=
	CLIENT_SECRET=

	function get_command()
	{

	{
	"apiVersion": "v1",
	"kind": "ClusterRole",
	"metadata": {
	"name": "hawkular-metrics-admin"
	},
	"rules": [
	{
	"apiGroups": [""],
	"resources": ["hawkular-metrics","hawkular-alerts"],