sleepyfox

'Users hate change'

This week NN Group released a video by Jakob Nielsen in which he attempts to help designers deal with the problem of customers being resistant to their new site/product redesign. The argument goes thusly:

1. Humans naturally resist change
2. Your change is for the better
3. Customers should just get used to it and stop complaining

There's slightly more to it than that, he caveats his argument with requiring you to have of course followed their best practices on product design, and allows for a period of customers being able to elect to continue to use the old site, although he says this is obviously only a temporary solution as you don't want to support both.

gragland

import { useState, useCallback, useRef } from "react";

// Usage
function App() {
  const [hoverRef, isHovered] = useHover();

  return (
    <div ref={hoverRef}>
      {isHovered ? '😁' : '☹️'}
    </div>

astoilkov

Async Operations with useReducer Hook

9 March, 2019

We were discussing with @erusev what we can do with async operation when using useReducer() in our application. Our app is simple and we don't want to use a state management library. All our requirements are satisfied with using one root useReducer(). The problem we are facing and don't know how to solve is async operations.

In a discussion with Dan Abramov he recommends Solution 3 but points out that things are fresh with hooks and there could be better ways of handling the problem.

Problem

nafeu

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""Template for python3 terminal scripts.

This gist allows you to quickly create a functioning
python3 terminal script using argparse and subprocess.
"""

import argparse

gragland

import { useState, useEffect } from 'react';

function App() {
  const columnCount = useMedia(
    // Media queries
    ['(min-width: 1500px)', '(min-width: 1000px)', '(min-width: 600px)'],
    // Column counts (relates to above media queries by array index)
    [5, 4, 3],
    // Default column count
    2

pvik

An animated cheatsheet for smartparens using the example configuration specified here by the smartparens author. Inspired by this tutorial for paredit.

Traversal

C-M-f	sp-forward-sexp
C-M-b	sp-backward-sexp

ptarjan

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

BretFisher

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

---

briceburg

FROM nginx:alpine

# stock verison from php:alpine image

# ensure www-data user exists
RUN set -x \
	&& addgroup -g 82 -S www-data \
	&& adduser -u 82 -D -S -G www-data www-data
# 82 is the standard uid/gid for "www-data" in Alpine
# http://git.alpinelinux.org/cgit/aports/tree/main/apache2/apache2.pre-install?h=v3.3.2

themoxman

#!/usr/bin/env ruby

require 'aws-sdk'

# initialize S3 client
s3_client = Aws::S3::Client.new(region: 'us-east-1')

# initialize KMS client
kms_client = Aws::KMS::Client.new(region: 'us-east-1')