pablen

import React, { Component } from 'react';
import PubSub from 'pubsub-js';

class App extends Component {
  state = { show: true };
  render() {
    return (
      <div className="App">
        <button onClick={() => this.setState(state => ({ show: !state.show }))}>
          {this.state.show ? 'Hide panel' : 'Show panel'}

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

joaocunha

This is no longer a bug. I'm keeping the gist for historical reasons, as it helped to get it fixed. Make sure to read the notes by the end of the post.

How to remove hide the select arrow in Firefox using -moz-appearance:none;

TL;DR (or, the fix)

1. Set -moz-appearance to none. This will "reset" the styling of the element;
2. Set text-indent to 0.01px. This will "push" the text a tiny bit^[1] to the right;

magnusdahlstrand

Remove ._*- and .AppleDouble-files from folders.
Adapted from Torkel's comment on http://hints.macworld.com/article.php?story=20021118060850652
Cred to hiber for suggesting adding -print0/-0 to solve whitespace issue.

See all ._*-files:
find . -name '._*' | more

Remove all ._*-files:
find . -name '._*' -print0 | xargs -0 rm