I'm trying to create examples of all the different ways to write functions and function type definitions in TypeScript.
One requirement is these examples must work with strict mode (noImplicitAny, etc) enabled.
If I'm missing anything, please add comments below with examples. I'll eventually put this into a blog post.
[02:06 PM] acemarke: @Steven : a couple other thoughts on the whole NODE_ENV thing. First, per my comments, it really is a Node concept. It's a system environment variable that Node exposes to your application, and apparently the Express web server library popularized using its value to determine whether to do optimizations or not
[02:08 PM] acemarke: Second, because of its use within the Node ecosystem, web-focused libraries also started using it to determine whether to they were being run in a "development" environment vs a "production" environment, with corresponding optimizations. For example, React uses that as the equivalent of a C #ifdef to act as conditional checking for debug logging and perf tracking. If process.env.NODE_ENV is set to "production", all those if clauses will evaluate to false.
Third, in conjunction with a tool like UglifyJS that does minification and removal of dead code blocks, a clause that is surrounded with if(process.env.NODE_ENV !== "development")
Instructions to obtain ZSH on a windows environment, without the input funny business presented by some other attempted solutions.
The final result is ZSH running on a mintty terminal, emulated by cygwin, and being handled by the popular cmder.
For the benefit of myself and others. I've already followed these instructions twice. It took me hours to figure all this out, maybe someone else can save a few.
This content moved here: https://exploringjs.com/impatient-js/ch_arrays.html#quickref-arrays
brew install tmux
Run tmux -CC or tmux -CC attach in iTerm2 and then menu is shown on terminal:
| #!/bin/bash | |
| # from | |
| # http://bergamini.org/computers/creating-favicon.ico-icon-files-with-imagemagick-convert.html | |
| convert source-WxW.png -resize 256x256 -transparent white favicon-256.png | |
| convert favicon-256.png -resize 16x16 favicon-16.png | |
| convert favicon-256.png -resize 32x32 favicon-32.png | |
| convert favicon-256.png -resize 64x64 favicon-64.png | |
| convert favicon-256.png -resize 128x128 favicon-128.png |
| ####################################### | |
| # Displays a yes/no prompt to continue that repeats until input matches. | |
| # Arguments: | |
| # $1 - (optional) a string representing the yes/no question to ask | |
| # $2 - (optional) a string representing the prompt style. | |
| # Returns: | |
| # 0 to proceed further (indicates "yes"), 1 to stop (indicates "no"). | |
| ####################################### | |
| continue_prompt() { | |
| local prompt default reply |
| // @ts-check | |
| "use strict" | |
| /** | |
| * Set up datadog tracing. This should be called first, so Datadog can hook | |
| * all the other dependencies like `http`. | |
| */ | |
| function setUpDatadogTracing() { | |
| const { tracer: Tracer } = require('dd-trace') | |
| const tracer = Tracer.init({ |
Hi Nicholas,
I saw you tweet about JSX yesterday. It seemed like the discussion devolved pretty quickly but I wanted to share our experience over the last year. I understand your concerns. I've made similar remarks about JSX. When we started using it Planning Center, I led the charge to write React without it. I don't imagine I'd have much to say that you haven't considered but, if it's helpful, here's a pattern that changed my opinion:
The idea that "React is the V in MVC" is disingenuous. It's a good pitch but, for many of us, it feels like in invitation to repeat our history of coupled views. In practice, React is the V and the C. Dan Abramov describes the division as Smart and Dumb Components. At our office, we call them stateless and container components (view-controllers if we're Flux). The idea is pretty simple: components can't
