nanmu42

This is the gist version of my blog post Quick Dockerfile for Python Poetry Projects.

I hope you find it useful.

nanmu42

Flink has a deadlock case and can be caused by the combination of Flink's backpressure mechanism with iterations (more likely when there is heavy feedback load).

There is a proposal to resolve this issue, but it seems to be abondoned.

The walkaround, suggested by Gábor Hermann, is to throttle messages into the iteration.

Here is my implementation.

nanmu42

FROM golang:buster as golang
RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -y \
    ca-certificates \
    tzdata \
    build-essential \
    tar \
    bash
WORKDIR /app
COPY . .

nanmu42

func firstNUTF8AtMost(s string, n int) string {
	i := 0
	for j := range s {
		if i >= n {
			return s[:j]
		}
		i++
	}
	return s
}

nanmu42

package main

import (
	"flag"
	"fmt"
	"net"
	"net/http"
)

var (

nanmu42

// source: https://stackoverflow.com/questions/41240761/check-if-ip-address-is-in-private-network-space
var privateIPBlocks []*net.IPNet

func init() {
	for _, cidr := range []string{
		"127.0.0.0/8",    // IPv4 loopback
		"10.0.0.0/8",     // RFC1918
		"172.16.0.0/12",  // RFC1918
		"192.168.0.0/16", // RFC1918
		"169.254.0.0/16", // RFC3927 link-local

nanmu42

const CompressionPlugin = require("compression-webpack-plugin");
const fileToCompressRegex = /\.(js|css|htm|html|svg|png|txt|json|wasm)$/
const productionMode = process.env.NODE_ENV === 'production'

let plugins = []
if (productionMode) {
    plugins.push(new CompressionPlugin({
        filename: '[path][base].br[query]',
        algorithm: 'brotliCompress',
        test: fileToCompressRegex,

nanmu42

// source: https://www.reddit.com/r/golang/comments/5ia523/idiomatic_way_to_remove_duplicates_in_a_slice/db6qa2e/
func SliceUniqMap(s []int) []int {
	seen := make(map[int]struct{}, len(s))
	j := 0
	for _, v := range s {
		if _, ok := seen[v]; ok {
			continue
		}
		seen[v] = struct{}{}
		s[j] = v

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function isTouchDevice() {
  return 'ontouchstart' in window
}

nanmu42

# unique line
awk '{!seen[$0]++};END{for(i in seen) if(seen[i]==1)print i}' file

# second column of a csv, with white spaces and quotes stripped
awk -F',' '{gsub(/[ "]/, "", $0);print $2}' some.csv > dest.txt