DeadNumbers

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).

Overview

This gist is based on the information available at golang/dep, only slightly more terse and annotated with a few notes and links primarily for my own personal benefit. It's public in case this information is helpful to anyone else as well.

I initially advocated Glide for my team and then, more recently, vndr. I've also taken the approach of exerting direct control over what goes into vendor/ in my Dockerfiles, and also work from isolated GOPATH environments on my system per project to ensure that dependencies are explicitly found under vendor/.

At the end of the day, vendoring (and committing vendor/) is about being in control of your dependencies and being able to achieve reproducible builds. While you can achieve this manually, things that are nice to have in a vendoring tool include:

Initialising Empty Structs in Rust

In C/C++, you can initialise a struct without giving values for any of the fields:

struct Point {
  float x;
  float y;
  float z;
};

	import http.server
	import http.cookiejar
	import io
	import socket
	from http import HTTPStatus

	import ssl
	import os
	import zlib
	server_address = ('0.0.0.0', 4443)

	#!/usr/bin/env python3
	'''
	bling.py - extract keys from macOS keychains.

	installation:
	pip install pytz hexdump vivisect-vstruct-wb tabulate argparse pycryptodome

	usage:
	python bling.py /path/to/keychain-db <password> ./path/to/output/directory

	### Ubuntu Xexial Xerus 16.04
	wget http://swupdate.openvpn.org/as/openvpn-as-2.1.12-Ubuntu16.amd_64.deb
	passwd passwd openvpn

	Admin UI: https://publicIPaddress:943/admin
	Client UI: https://publicIPaddress:943/


	go to Server Network Settings -> Hostname or IP Address:
	change it from private IP to public IP

	#
	# TO-DO: set \|DESTINATIONURL\| below to be whatever you want e.g. www.google.com. Do not include "http(s)://" as a prefix. All matching requests will be sent to that url. Thanks @Meatballs__!
	#
	# Note this version requires Apache 2.4+
	#
	# Save this file into something like /etc/apache2/redirect.rules.
	# Then in your site's apache conf file (in /etc/apache2/sites-avaiable/), put this statement somewhere near the bottom
	#
	# Include /etc/apache2/redirect.rules
	#

	package main

	import (
	"bytes"
	"fmt"
	"os/exec"
	"strings"
	)

	func main() {

	// CSVToMap takes a reader and returns an array of dictionaries, using the header row as the keys
	func CSVToMap(reader io.Reader) []map[string]string {
	r := csv.NewReader(reader)
	rows := []map[string]string{}
	var header []string
	for {
	record, err := r.Read()
	if err == io.EOF {
	break
	}

	package xmlparser

	import (
	"os"
	"golang.org/x/text/encoding/charmap"
	"log"
	"bytes"
	"io"
	"strings"
	)