kylelemons’s gists

kylelemons / enc.go

Created February 18, 2013 20:03

Simple RSA encryption/decryption. It uses the same public and private key, so it encrypts a message to itself. It can only encrypt short data (RSA is more for encrypting the key to the data than the data itself).

	package main

	import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/sha1"
	"crypto/x509"
	"encoding/pem"
	"flag"
	"io/ioutil"

kylelemons / formtpl.go

Created February 16, 2013 17:20

Quick and dirty example of HTML forms with validation dropping data into a struct. Note that the scanf should probably be replaced with a type switch, because it likes tokenized input.

	package main

	import (
	"fmt"
	"html/template"
	"net/url"
	"os"
	"regexp"
	)

kylelemons / custombase32.go

Last active December 11, 2015 10:18

This is the base32 used in http://dnscurve.org/in-implement.html

	package main

	import (
	"encoding/hex"
	"fmt"
	)

	var i2b = []byte("0123456789bcdfghjklmnpqrstuvwxyz")
	var b2i = func() []byte {
	var ascii [256]byte

kylelemons / gist:4464403

Last active December 10, 2015 16:58

	benchmark old ns/op new ns/op delta
	BenchmarkWriteDefault 14287 3258 -77.20%
	BenchmarkWriteShortList 13116 3516 -73.19%
	BenchmarkWriteCompact 10669 2897 -72.85%
	BenchmarkWriteDiffable 16807 3786 -77.47%

	benchmark old MB/s new MB/s speedup
	BenchmarkWriteDefault 7.98 34.99 4.38x
	BenchmarkWriteShortList 5.95 22.18 3.73x
	BenchmarkWriteCompact 4.12 15.19 3.69x

kylelemons / euler24_brute.go

Created December 9, 2012 05:58

Project Euler #24 in Go - Answer: [2 7 8 3 9 1 5 4 6 0]

	package main

	import (
	"fmt"
	)

	const Max = 10
	const Index = 1000000

	func main() {

kylelemons / preprocess.go

Created July 3, 2012 17:21

I don't recommend it, but you can preprocess Go code.

	/*
	You can preprocess this using the following:
	gcc -E -x c -P -C main.go
	*/

	/* abs.h */
	#define ABS(N, T) func Abs##N(v T) T { \
	; if v < 0 { \
	; return -v \
	; } \

kylelemons / passwd.go

Created May 16, 2012 15:54

Very simple unicode-aware password checking

	package main

	import (
	"fmt"
	"unicode"
	)

	func validPassword(s string) error {
	next:
	for name, classes := range map[string][]*unicode.RangeTable{

kylelemons / makedict.go

Created May 11, 2012 00:25 — forked from lamvak/makedict.go

particularly disturbing fragment of my new poliqarp binding (in progress)

	func MakeDict(prefix string, strings []string) (dict *Dict, err error) {
	image_file_size := 0
	dict, err = nil, nil
	for _, s := range strings {
	// accomodate the string itself, length counter and zero-byte marker
	// for the reason of backwards debility
	image_file_size += len(s) + 5
	}
	image_file, err := os.Create(prefix + `.image`)
	defer image_file.Close()

kylelemons / broadcast.go

Created April 30, 2012 22:47

Untested method of registering and unregstering broadcast channels

	func manager() {
	chans := map[chan data]bool
	active := sync.WaitGroup{}
	for {
	select {
	case c := <-register:
	chans[c] = true
	case c := <-unregister:
	active.Wait()
	delete(chans, c)

kylelemons / bdr_proto.proto

Created April 18, 2012 01:06 — forked from spikebike/bdr_proto.proto

example for protobuf, go, and the repeated protobuf entry

	package bdr_proto;

	message request {
	message blob {
	required string hash = 1; // the sha256 checksum of the blob
	required int32 size = 2; // the size of the blob
	}
	repeated blob blobs = 1;
	}

Kyle Lemons kylelemons