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package main

import (
	"encoding/xml"
	"fmt"
)

type BoolYN bool

func (b BoolYN) MarshalXMLAttr(name xml.Name) (xml.Attr, error) {

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package main

import "fmt"

func minimalIncomplete(yield func(int, string) bool) {
	for i := range 9 {
		// If yield returns false because of break/return and we don't check,
		// the calling range loop will panic.
		yield(i, fmt.Sprintf("==%d==", i))
	}

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Connect two Docker containers using network

Oversimplified HOWTO based on the Docker networking tutorial.

Create a user-defined bridge network

docker network create --driver bridge redis-net

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How to clean up a whiteboard photo using GIMP

Skipping other possible actions, such as perspective corrections, here is how:

1. Duplicate the base image layer.
2. Set the new layer's mode to "Divide".
3. Apply a Gaussian blur with a radius of about 50 (Filters/Blur/Gaussian Blur...).

If you need to manipulate the resulting image further, create a new layer from visible (Layer/New from Visible).

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# Transliterate Unicode to ASCII
print(unicodedata.normalize('NFKD', 'bździągwa').encode('ascii', 'ignore').decode())

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[alias]
  tree = log --graph --color --decorate --format=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all

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#!/usr/bin/awk -f

BEGIN {
  RS = ":|\n"
}

{
  if (data[$0]++ == 0)
    lines[++count] = $0
}

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#!/bin/bash

convert "$1" \( +clone -colorspace gray -negate -blur 0x300 \) \
        -compose softlight -composite "$2"

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#!/usr/bin/env python

import collections
import os
import sqlite3
import struct


LENSFUN_PARAM_NAMES = """
modify_flags

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# Extract full-size previews from Nikon raw files
# Replace '-w' with '-w!' to overwrite existing files
exiftool -JpgFromRaw -b -w %d%f.JPG -ext NEF -r directory-or-files

# Copy all tags from raw to JPEG files (best used after above)
# Use the '-overwrite_original' option to skip backup files
exiftool -tagsfromfile %d%f.NEF -ext JPG -r directory-or-files

# Both operations in one command
# -w without format codes is treated as extension