Komu Wairagu komuw

there used to be a bio here, then the package it depended on was removed from the package repository.

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komuw / encrypt_decrypt.go

Last active July 6, 2022 19:32

encrypt and decrypt in Go

	package main

	import (
	"crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"crypto/sha256"
	"encoding/base64"
	"errors"
	"fmt"

komuw / erasure_encoding.go

Last active August 3, 2023 08:40

use erasure encoding to survive data loss

	package main

	import (
	"fmt"
	"os"

	"github.com/klauspost/reedsolomon"
	)

	// You can use erasure encoding to;

komuw / check_mux.go

Last active November 23, 2021 11:07

golang muxes do not inherit middlewares. Also middlewares are not deduped.

	package main

	import (
	"fmt"
	"net/http"

	"github.com/go-chi/chi"
	"github.com/gorilla/mux"
	)

komuw / cert-manager.yaml

Created September 16, 2021 07:40

create a golang k8(kubernetes) struct from yaml file

	# gotten from; https://github.com/jetstack/cert-manager/releases/download/v1.3.3/cert-manager.yamlhttps://github.com/jetstack/cert-manager/releases/download/v1.3.3/cert-manager.yaml
	apiVersion: apps/v1
	kind: Deployment
	metadata:
	labels:
	app: cert-manager
	app.kubernetes.io/component: controller
	app.kubernetes.io/instance: cert-manager
	app.kubernetes.io/name: cert-manager
	name: cert-manager

komuw / three_sigma_sampling.py

Last active December 4, 2020 10:18

In a normal distribution, 99.7% of the values are not anomalous. Which means you can throw away 99.7% without losing context. This is useful in sampling.

	def sample_anomalous(samples):
	"""
	Sampling:
	- Central limit theorem(Alan Turing)
	- 3-sigma rule: In a normal distribution, 99.7% of the values are not anomalous.
	Which means you can throw away 99.7% without losing context.
	- You may also use 2-sigma(95%) or 1-sigma(68%)
	see:
	1. https://youtu.be/inrqE0Grgk0?t=26080 (Emmanuel T Odeke)
	2. https://en.wikipedia.org/wiki/68%E2%80%9395%E2%80%9399.7_rule

komuw / variable_shadowing_race.go

Created November 5, 2020 13:24

Golang variable shadowing can mask race conditions

	package main

	import "time"

	type cool struct{}

	func (c *cool) add() error {
	return nil
	}

komuw / complex_types.go

Last active October 29, 2020 13:29

pointer receiver versus value receiver benchmarks

	package main

	import (
	"fmt"
	"math"
	"testing"
	)

	/* ---------- package ---------- */
	type h struct {

komuw / fdatasync_vs_fsync.go

Last active July 7, 2021 15:32

Benchmark fdatasync vs fsync

	package main

	import (
	"log"
	"math/rand"
	"os"
	"syscall"
	"testing"
	"time"

komuw / panic_handler.go

Last active December 16, 2020 16:58

global panic handler in Go

	package main

	import "fmt"

	// Usage:
	//
	// func main() {
	// defer panicHandler()
	// }
	//

komuw / go_errors_with_stacktrace.go

Created November 9, 2019 15:36

Golang errors with stack traces

	package main

	import (
	"fmt"
	"runtime"
	"strconv"
	"strings"
	)

	/*

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