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NFC で書き換えられる 400x300 4色電子ペーパーのプロトコル

いま巷で話題の NFC で書き換えできる名札サイズの電子ペーパーのプロトコルを調べました。

1. 前提

• 画面サイズ: 400 x 300
• 色インデックス (2bit):
  • 0 = Black
• 1 = White

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#!/usr/bin/env python3
"""
Apply Atkinson dithering to an input PNG using a fixed 4-color palette:
red, yellow, black, and white.
"""

from __future__ import annotations

import argparse
from pathlib import Path

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Unsafe Binding Access on SwiftUI

It’s not always safe to access a Binding within a callback that isn’t part of SwiftUI’s event system. An example is illustrated in the following sample code:

extension Notification.Name {
    static let event = Notification.Name("event")
}

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//
//  RunOnMainRunLoopExitScheduler.swift
//  RunOnMainRunLoopExitScheduler
//
//  Created by Yoshimasa Niwa on 11/5/25.
//

import Combine
import Foundation

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# Copy files to the "documents" folder by using MTP.
# Mostly for sending documents locally to recent Kindle devices.
#
# Usage: python3 copy_to_documents.py [file ...]
#
# Requires `aftl` package that can be installed from a non-master branch at
# <https://github.com/niw/android-file-transfer-linux>.
#
# Copyright (c) 2025 Yoshimasa Niwa
#

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//
//  Tuple.swift
//  Tuple
//
//  Created by Yoshimasa Niwa on 8/8/25.
//

public struct Tuple<each T: Equatable>: Equatable {
    public static func == (lhs: Tuple<repeat each T>, rhs: Tuple<repeat each T>) -> Bool {
        var result = true

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#!/bin/bash

# Congratulations! You found the easter egg! ❤️
# おめでとうございます！隠されたサプライズを見つけました！❤️

# Define the text to animate
text="♥PEACE♥FOR♥ALL♥PEACE♥FOR♥ALL♥PEACE♥FOR♥ALL♥PEACE♥FOR♥ALL♥PEACE♥FOR♥ALL♥"

# Get terminal dimensions
cols=$(tput cols)

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//
//  UUIDv7.swift
//  UUIDv7
//
//  Created by Yoshimasa Niwa on 7/25/25.
//

import Foundation
import Security

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import Foundation

public enum ChunkedDataTaskError: Swift.Error {
    case notSuccess(_ data: Data, _ httpResponse: HTTPURLResponse)
}

private extension Int {
    var isSuccess: Bool {
        (200 ..< 300).contains(self)

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import AppKit
import SwiftUI

public struct TextView: NSViewRepresentable {
    @Binding
    var text: String
    var font: NSFont?

    public init(
        text: Binding<String>