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Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

• There are always 24 hours in a day.
• February is always 28 days long.
• Any 24-hour period will always begin and end in the same day (or week, or month).

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schema {
    query: Query
    mutation: Mutation
}

type Query {
    session(id: ID!): Session
}

type Mutation {

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package main

import (
	"context"
	"fmt"
	"math/rand"
	"time"
)

const timeout = time.Second

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name: $(Date:yyyyMMdd).dev$(Rev:.r)

variables:
  SolutionFileName: 'Please change the solution name.sln'
  SolutionName: 'Please change the solution name'
  MSBuildPath: 'C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\MSBuild\15.0\Bin\MSBuild.exe'
  UnityPath: 'C:\Program Files\Unity\Hub\Editor\2017.4.14f1\Editor\Unity.exe'

trigger:
  branches:

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public class DeviceThreadDispatcher : IThreadDispatcher
{
    private static int _uiThreadId;

    public bool IsOnUiThread => Environment.CurrentManagedThreadId == _uiThreadId;

    public static void Initialize(int uiThreadId) => _uiThreadId = uiThreadId;

    public T RequestMainThreadAsyncOperation<T>(Func<Task<T>> operation)
    {

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using System;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using Android.Support.V4.Widget;
using Android.Views;
using System.Reflection;
using System.ComponentModel;
using Android.Gms.Maps;
using Android.OS;
using View = Android.Views.View;

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using System;
using Cirrious.FluentLayouts.Touch;
using Foundation;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
 
[assembly: ExportRenderer(typeof(PlaceholderEditor), typeof(PlaceholderEditorRenderer))]
namespace EditorWithPlaceholder.iOS.Renderers
{

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using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
 
[assembly: ExportRenderer(typeof(PlaceholderEditor), typeof(PlaceholderEditorRenderer))]
namespace EditorWithPlaceholder.Droid.Renderers
{
    public class PlacehoderEditorRenderer : EditorRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
        {

mmierzwa

using Xamarin.Forms;
 
namespace EditorWithPlaceholder
{
    public class PlaceholderEditor : Editor
    {
        public static BindableProperty PlaceholderProperty
            = BindableProperty.Create(nameof(Placeholder), typeof(string), typeof(PlaceholderEditor));
 
        public static BindableProperty PlaceholderColorProperty

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public class LoginCheckAppStart : MvxNavigatingObject, IMvxAppStart
{
    private readonly IApplicationSettings _applicationSettings;
    private readonly ISecureStorageService _secureStorage;

    public LoginCheckAppStart(IApplicationSettings applicationSettings, ISecureStorageService secureStorage)
    {
        _applicationSettings = applicationSettings;
        _secureStorage = secureStorage;
    }