elijahmanor

Common Bugs when Learning React

The following list tries to summarize some of the things that a developer may encounter while learning React. The list focuses on scenarios that result in actual bugs (things that don't work) or things that cause warnings in the console.

• using class prop instead of className (for/htmlFor, etc...)
• trying to set the style prop with a string
• not having a parent element or fragment
• not binding (at all or incorrectly)
• using the wrong lifecycle hook
• misspelling componentWillReceiveProps

richorama

declare @Result varchar(max)
declare @TableName varchar(256)

DECLARE table_cursor CURSOR
FOR Select name from sysobjects where xtype = 'U' -- or 'V'

OPEN table_cursor
FETCH NEXT FROM table_cursor   
INTO @TableName

jkrems

Modules - History & Future

History

• Early work by Ihab Awad (Google) and Kris Kowal (FastSoft)
  • https://twitter.com/kriskowal/status/943547614158450688
  • Hermetic eval presentation: https://docs.google.com/presentation/d/1KlPxgocvzpTq44KTF4xZ6TnzGRsy628hP5he7bXVB3I/edit#slide=id.i0
• 2009-09: 2nd draft of module strawman, still very close to "closures as modules", export x = 42
  • https://esdiscuss.org/topic/hermetic-evaluation-modules-strawman

• https://docs.google.com/document/u/1/pub?id=1hNv1SHh_v_6nD1QBd6pySUJ2U5roAELzW5cqD2tt_WM

thorsman99

IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results

ryantuck

# install:
# pip3 install python-gnupg

# note - gpg needs to be installed first:
# brew install gpg
# apt install gpg

# you may need to also:
# export GPG_TTY=$(tty)

jessfraz

# Description: Boxstarter Script
# Author: Jess Frazelle <jess@linux.com>
# Last Updated: 2017-09-11
#
# Install boxstarter:
# 	. { iwr -useb http://boxstarter.org/bootstrapper.ps1 } | iex; get-boxstarter -Force
#
# You might need to set: Set-ExecutionPolicy RemoteSigned
#
# Run this boxstarter by calling the following from an **elevated** command-prompt:

GeorgeTsiokos

public static class ServiceLocator
{

    static readonly TaskCompletionSource<IContainer> __container = new TaskCompletionSource<IContainer>();

    public static IContainer Instance {
        get => __container.Task.Result;
        set => __container.SetResult(value);
    }

GeorgeTsiokos

internal class TestProvider : LiteralBasedProvider
{
    public override void NotifyUser(string user, string password)
    {
        Console.WriteLine($"NotifyUser {user} {password}");
        if (false)
            throw new AccessException("Unauthorized user");
    }
}

yzorg

# Win-R, iexplore http://boxstarter.org/package/url?https://gist.githubusercontent.com/yzorg/...
Enable-RemoteDesktop

# Use **Developer** in Win10 settings to enable Explorer: file extensions, show full path, show hidden & system files, etc.
# manual, in powershell admin: `Set-ExecutionPolicy Unrestricted -Force`

# https://scotch.io/bar-talk/trying-the-new-wsl-2-its-fast-windows-subsystem-for-linux
Enable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform
# manual: install Pengwin (formerly WLinux) or Ubuntu
# wsl -l

developit

import { h, Component } from 'preact';


/** Creates a new store, which is a tiny evented state container.
 *  @example
 *    let store = createStore();
 *    store.subscribe( state => console.log(state) );
 *    store.setState({ a: 'b' });   // logs { a: 'b' }
 *    store.setState({ c: 'd' });   // logs { c: 'd' }
 */