pzurek

Twelve Go Best Practices

Francesc Campoy Flores Gopher at Google @francesc http://campoy.cat/+

http://golang.org

• Best practices

justinas

package main

import (
	"net/http"
)

type SingleHost struct {
	handler     http.Handler
	allowedHost string
}

Myuzu

# UPD from 2018:
# This gist was written for pre-1.0 version of Elixir and won't work on post-1.0 versions.
# You probably consider using something else!

defmodule SecureRandom do
  @moduledoc """
  Ruby-like SecureRandom module.

  ## Examples

chanks

Turning PostgreSQL into a queue serving 10,000 jobs per second

RDBMS-based job queues have been criticized recently for being unable to handle heavy loads. And they deserve it, to some extent, because the queries used to safely lock a job have been pretty hairy. SELECT FOR UPDATE followed by an UPDATE works fine at first, but then you add more workers, and each is trying to SELECT FOR UPDATE the same row (and maybe throwing NOWAIT in there, then catching the errors and retrying), and things slow down.

On top of that, they have to actually update the row to mark it as locked, so the rest of your workers are sitting there waiting while one of them propagates its lock to disk (and the disks of however many servers you're replicating to). QueueClassic got some mileage out of the novel idea of randomly picking a row near the front of the queue to lock, but I can't still seem to get more than an an extra few hundred jobs per second out of it under heavy load.

So, many developers have started going straight t

ernesto-jimenez

Patch to cross compile to android with net/http support

Installation instructions

We need to patch Go's source code to allow cgo when cross-compiling and make Android-specific changes since it sometimes differs from linux (e.g.: it doesn't use /etc/resolv.conf for DNS config)

1. Clone the go source: hg clone -u release https://code.google.com/p/go
2. Enter the go source directory: cd go
3. Apply the patch in this gist: patch -p1 < /path/to/patch/go_android.patch
4. Enter the go/src directory: cd src

manishtpatel

package main

import (
	"crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"encoding/base64"
	"fmt"
	"io"
)

rwjblue

• Data Down / Actions Up

  • http://emberjs.jsbin.com/nayaho/edit?html,js - Interdependent select boxes. No observers.
  • http://ember-twiddle.com/2d7246875098d0dbb4a4 - One Way Input

• Plain JSBin's

  • http://rwjblue.jsbin.com/pixeki/edit?html,js,output

• Ember Version Base JSBin's

  • 1.0 - http://emberjs.jsbin.com/juluje/edit?html,js,output

• 1.1 - http://emberjs.jsbin.com/cofufo/edit?html,js,output

jeffjohnson9046

// In app.js or main.js or whatever:
// var myApp = angular.module('askchisne', ['ngSanitize', 'ngAnimate', 'ui.bootstrap', 'ui.bootstrap.tpls']);

// This filter makes the assumption that the input will be in decimal form (i.e. 17% is 0.17).
myApp.filter('percentage', ['$filter', function ($filter) {
  return function (input, decimals) {
    return $filter('number')(input * 100, decimals) + '%';
  };
}]);

mikaelbr

// === Arrays

var [a, b] = [1, 2];
console.log(a, b);
//=> 1 2


// Use from functions, only select from pattern
var foo = () => [1, 2, 3];

davecheney

package bm

import (
	"testing"
)

var mb = map[string]bool{
	"alpha":   true,
	"beta":    true,
	"gamma":   true,