bprosnitz’s gists

bprosnitz / airport_data

Last active August 29, 2015 14:27

Find flight times to locations around the world from a specified location

	1,"Goroka","Goroka","Papua New Guinea","GKA","AYGA",-6.081689,145.391881,5282,10,"U","Pacific/Port_Moresby"
	2,"Madang","Madang","Papua New Guinea","MAG","AYMD",-5.207083,145.7887,20,10,"U","Pacific/Port_Moresby"
	3,"Mount Hagen","Mount Hagen","Papua New Guinea","HGU","AYMH",-5.826789,144.295861,5388,10,"U","Pacific/Port_Moresby"
	4,"Nadzab","Nadzab","Papua New Guinea","LAE","AYNZ",-6.569828,146.726242,239,10,"U","Pacific/Port_Moresby"
	5,"Port Moresby Jacksons Intl","Port Moresby","Papua New Guinea","POM","AYPY",-9.443383,147.22005,146,10,"U","Pacific/Port_Moresby"
	6,"Wewak Intl","Wewak","Papua New Guinea","WWK","AYWK",-3.583828,143.669186,19,10,"U","Pacific/Port_Moresby"
	7,"Narsarsuaq","Narssarssuaq","Greenland","UAK","BGBW",61.160517,-45.425978,112,-3,"E","America/Godthab"
	8,"Nuuk","Godthaab","Greenland","GOH","BGGH",64.190922,-51.678064,283,-3,"E","America/Godthab"
	9,"Sondre Stromfjord","Sondrestrom","Greenland","SFJ","BGSF",67.016969,-50.689325,165,-3,"E","America/Godthab"
	10,"Thule Air Base","Thule","Greenl

bprosnitz / tee_copy.go

Created September 16, 2015 00:07

Tee Copy in Go

	package debug

	import (
	"fmt"
	"io"
	)

	func teeCopy(w1 io.Writer, w2 io.Writer, r io.Reader) (totalN int, err error) {
	buf := make([]byte, 1024)
	for {

bprosnitz / indirection_test.go

Created September 17, 2015 17:34

Go method indirection benchmarks

	package fs

	// indirection techniques in go
	//BenchmarkDirectFib-12 2000000000 0.13 ns/op
	//BenchmarkSavePtr-12 30 34612496 ns/op
	//BenchmarkUseBool-12 1000000000 0.53 ns/op
	//BenchmarkIface-12 2000000000 0.16 ns/op
	//ok fs 27.053s

	import "testing"

bprosnitz / dump.go

Last active October 2, 2015 21:54

dump objects / deep print

	func dump(seen map[reflect.Value]bool, rv reflect.Value) string {
	if rv.Kind() == reflect.Invalid {
	return "nil"
	}
	if _, ok := seen[rv]; ok {
	return "SEEN[" + rv.Type().Name() + "]"
	}
	seen[rv] = true

	method := rv.MethodByName("String")

bprosnitz / tee_writer.go

Created October 6, 2015 16:19

Tee Writer - Write to two writers

	package teewriter

	type TeeWriter struct {
	w1 io.Writer
	w2 io.Writer
	}

	func (tw *TeeWriter) Write(p []byte) (n int, err error) {
	n1, err1 := tw.w1.Write(p)
	n2, err2 := tw.w2.Write(p)

bprosnitz / linediff.go

Created December 28, 2015 20:52

Diff two lines

bprosnitz / perfbench_test.go

Last active January 12, 2016 00:05

Go benchmarks

	//Put this file in $GOPATH/perfbench/perfbench_test.go
	//go test -bench . -v perfbench/...
	//
	//go version go1.5.1 linux/amd64
	//
	//noop: 0
	//var x interface{} = <int8>: 1
	//var x interface{} = <*int8>: 0
	//var x interface{} = <[]int16>: 1
	//var x interface{} = <typedInterface(ptr)>: 0

bprosnitz / cloneobjectstring.js

Last active March 10, 2016 06:52

Generate javascript code that will create a clone of a given javascript object

	function buildValMap(obj, m) {
	if (typeof obj !== 'object' \|\| obj === null) {
	return '';
	}
	if (obj === Object.prototype \|\| obj === Array.prototype) {
	return '';
	}
	if (m.has(obj)) {
	return '';
	}

bprosnitz / quick_line_diff.go

Created March 1, 2016 17:26

Helper to diff lines for debugging multi-line output

	func diffLines(a, b string) {
	fmt.Printf("len(a) %d len(b) %d\n", len(a), len(b))
	sa := bufio.NewScanner(strings.NewReader(a))
	sb := bufio.NewScanner(strings.NewReader(b))

	index := 0
	for {
	index++
	var readSomething bool
	var aline string

bprosnitz / cpu-bench-mode.sh

Created March 15, 2016 17:36

Set CPU clock speed to "performance" for benchmarks

	#!/bin/bash

	# sudo apt-get install cpufrequtils

	sudo cpufreq-set -c 0 -g performance
	sudo cpufreq-set -c 1 -g performance
	sudo cpufreq-set -c 2 -g performance
	sudo cpufreq-set -c 3 -g performance
	sudo cpufreq-set -c 4 -g performance
	sudo cpufreq-set -c 5 -g performance

Benjamin Prosnitz bprosnitz