slikts

React context vs Redux in 2020

The [React docs][condoc] give some example use cases for context:

Context is designed to share data that can be considered “global” for a tree of React components, such as the current authenticated user, theme, or preferred language.

The common property of these use cases is that data like the current theme doesn't change often and needs to be shared deep down the component tree, which would be cumbersome with "[prop drilling][drill]". Something else that needs to be shared everywhere is the application state when using a "single source of truth" pattern, so it would follow that the context API would help with that as well, but there's a catch: components that use context will rerender every time that the provided value changes, so sharing the whole application state through context would cause excessive render lifecycles.

Jakobud

# If you are using Windows as your Vagrant host OS, there is a limitation in Windows where any given folder path
# cannot be more than 260 characters long. This becomes a problem with Vagrant because, for example, if you 
# install a Linux guest environment and try to create a deep directory structure in a synced folder, Linux will
# throw errors. This is because the synced folder is under the constraints of the Windows host. A common example
# of this happening is when installing node.js modules. NPM is known for creating some very long, deep
# folder paths because each node depenency has it's own dependencies, which have their own dependencies, etc...
#
# This gist solves the problem and works around the Windows 260 character path limit. Add it to your Vagrantfile.
#
# NOTE: This bug in Vagrant was fixed in 1.7.3, but reverted back in 1.7.4 due to some regression bugs.

ohanhi

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Editorial note

suissa

// Bring Mongoose into the app
var mongoose = require( 'mongoose' );

// Build the connection string
var dbURI = 'mongodb://localhost/mongoose-best-practices';

// Create the database connection
mongoose.connect(dbURI);

// CONNECTION EVENTS

davidzchen

/*
 * Sample file using the Linux kernel coding convention.
 *
 *  https://www.kernel.org/doc/Documentation/CodingStyle
 *
 * General rules:
 *  - Indents are tabs and must be 8 spaces wide.
 *  - Each line must be at most 80 characters long.
 *  - Use C-style comments.
 *  - File names should be lower-case.c

ndarville

Business Models

Advertising

Models	Examples
Display ads	Yahoo!
Search ads	Google

mahata

(defun eshell-mode-hook-func ()
  (setq eshell-path-env (concat "/usr/local/bin:" eshell-path-env))
  (setenv "PATH" (concat "/usr/local/bin:" (getenv "PATH")))
  (define-key eshell-mode-map (kbd "M-s") 'other-window-or-split))

(add-hook 'eshell-mode-hook 'eshell-mode-hook-func)

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

vreon

! Molokai theme
*xterm*background: #101010
*xterm*foreground: #d0d0d0
*xterm*cursorColor: #d0d0d0
*xterm*color0: #101010
*xterm*color1: #960050
*xterm*color2: #66aa11
*xterm*color3: #c47f2c
*xterm*color4: #30309b
*xterm*color5: #7e40a5

isaacs

echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://www.npmjs.org/install.sh | sh