Kirill Freiman kfreiman

This post presents an interesting way to make error handling more brief in Golang 1.18

One of the downsides to this approach is that defer functions and catching panics can be generally more expensive than using if/return for error handling. I decided to benchmark to see how significant the penalty turns out to be.

For some boilerplate, we have a giveError function:

func giveError(b bool) (int, error) {
  if b {
    return 0, fmt.Errorf("given error")

Benchmark results

large_string_join

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`jrsonnet large_string_join.jsonnet`	16.5 ± 0.5	16.1	19.6	1.00
`gojsonnet large_string_join.jsonnet`	90.7 ± 3.8	85.6	104.0	5.49 ± 0.29
`jsonnet large_string_join.jsonnet`	69.5 ± 2.4	68.2	78.1	4.20 ± 0.20
`sjsonnet large_string_join.jsonnet`	760.6 ± 12.7	739.9	787.2	46.00 ± 1.67

VideoJS, React and Typescript

WARNING: A work in progress, this is a first attempt at getting VideoJs working in a Typescript and React Enviroment.

This was inspired from the VideoJS React Tutorial - (see also Brightcover Player with React and Typescript)

Prerequistes Using TypeScript-React-Starter: https://github.com/Microsoft/TypeScript-React-Starter

Then npm install packages

	/* Both these funcitons will work fine */

	// As a function declaration
	function DECODE(url) {
	return decodeURI(url)
	}

	// Or as an arrow function
	const DECODEURL = (url) => decodeURI(url)

	CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

	-- My port of https://github.com/kurttheviking/uuid-with-v6-js
	-- A hacky translation of:
	-- - http://gh.peabody.io/uuidv6/
	-- - https://tools.ietf.org/html/draft-peabody-dispatch-new-uuid-format
	CREATE OR REPLACE FUNCTION uuid_v1_to_v6(v1 uuid)
	RETURNS uuid AS $$
	DECLARE
	v6 text;

	/*
	* MIT License
	*
	* Copyright (c) 2023-2024 Fabio Lima
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is

	package server

	import (
	"context"
	"os"
	"os/signal"
	"syscall"
	"time"

	"golang.org/x/sync/errgroup"

	package main

	import (
	"encoding/gob"
	"bytes"
	)

	func GetBytes(key interface{}) ([]byte, error) {
	var buf bytes.Buffer
	enc := gob.NewEncoder(&buf)

	FROM node:10-alpine

	# Create app directory
	RUN mkdir -p /usr/src/app
	WORKDIR /usr/src/app

	# Install app dependencies
	COPY package.json /usr/src/app/
	COPY yarn.lock /usr/src/app/
	RUN yarn install

	package main

	import (
	"context"
	"encoding/json"
	"fmt"
	"reflect"

	"github.com/olivere/elastic"
	)