ichengzi

public static class Extensions
{
    public static void AddRange<T>(this ObservableCollection<T> oc, IEnumerable<T> collection)
    {
        if (collection == null)
        {
            throw new ArgumentNullException("collection");
        }
        collection.ToList().ForEach( oc.Add);
    }

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public static string InsertNewLine(string source, int len = 76)
{
	var sb = new StringBuilder(source.Length + (int)(source.Length / len) + 1);
	var start = 0;
	while ((start + len) < source.Length)
	{
		sb.Append(source.Substring(start, len));
		sb.Append(Environment.NewLine);
		start += len;
	}

ichengzi

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>author</key>
	<string>Chris Thomas</string>
	<key>name</key>
	<string>Mac Classic</string>
	<key>settings</key>
	<array>

ichengzi

/*++ BUILD Version: 0073     Increment this if a change has global effects

Copyright (c) Microsoft Corporation. All rights reserved.

Module Name:

    winnt.h

Abstract:

ichengzi

// https://gist.github.com/ichengzi/fa90fede6c7ce91bbb083ea2e5466a38

const entry = {
    a: {
        b: {
            c: {
                dd: "abcdd"
            }
        },
        d: {

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/* https://www.bilibili.com/video/BV1mA4y1Z7cy */
/* https://m.php.cn/article/473454.html  画三角形文章 */

details {
    position: relative;
    width: 300px;
    padding-left: 20px;
}

summary {

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// https://www.bilibili.com/video/BV1BL411K7Dy

const arr = [
    [1, 2, 2],
    [3, 4, 5, 5],
    [6, 7, 8, 9,
        [11, 12,
            [12, 12,
                [13]
            ]

ichengzi

public static class Base64Url
{
	public static string Encode(byte[] arg)
	{
		if (arg == null)
		{
			throw new ArgumentNullException("arg");
		}

		var s = Convert.ToBase64String(arg);

ichengzi

public class RandomIdCardUtil
{
    [Test]
    public void generate()
    {
        for (int i = 0; i < 100; i++)
        {
            var cusId = RandomIDCardGenerator.GetRandomCard(14, 14);
            Console.WriteLine($"{cusId.Substring(0, 6)}" +
                              $"-{cusId.Substring(6, 4)}" +

ichengzi

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace demo
{
    public class MimeType
    {
        public static string GetOrDefault(string fileExtension, string defaultMime)