mikaelvesavuori

Get Individual Contributor metrics from GitHub's GraphQL API

These are some handy snippets to get common metrics for checking how active a software engineer is.

• How many pushes are made by the IC?
• How many reviews are made by the IC?
• How many comments are made by the IC?

Setup

phatnguyenuit

How to sort imports like a pro in TypeScript

Crossing reviews becomes a very common activity today in engineering behavior. To help us review changes for pull/merge requests easier, sorting imports can help us a much. The codebase becomes more professional and more consistent, reviewers will be happier, and the review process will be faster, focusing on the implementation changes ONLY.

Have you ever thought about how to sort imports in TypeScript projects automatically?

Let me show you how to archive sorting imports automatically in TypeScript projects with ESLint!

joepie91

ES Modules are terrible, actually

This post was adapted from an earlier Twitter thread.

It's incredible how many collective developer hours have been wasted on pushing through the turd that is ES Modules (often mistakenly called "ES6 Modules"). Causing a big ecosystem divide and massive tooling support issues, for... well, no reason, really. There are no actual advantages to it. At all.

It looks shiny and new and some libraries use it in their documentation without any explanation, so people assume that it's the new thing that must be used. And then I end up having to explain to them why, unlike CommonJS, it doesn't actually work everywhere yet, and may never do so. For example, you can't import ESM modules from a CommonJS file! (Update: I've released a module that works around this issue.)

And then there's Rollup, which apparently requires ESM to be u

guybedford

const mocks = Object.create(null);
global.mock = function (_mocks) {
  Object.assign(mocks, _mocks);
};

export async function resolve (specifier, context, parentResolve) {
  if (mocks[specifier]) {
    return { url: 'mock:' + specifier };
  }
  return parentResolve(specifier, context);

pcgeek86

Get-Command                                               # Retrieves a list of all the commands available to PowerShell
                                                          # (native binaries in $env:PATH + cmdlets / functions from PowerShell modules)
Get-Command -Module Microsoft*                            # Retrieves a list of all the PowerShell commands exported from modules named Microsoft*
Get-Command -Name *item                                   # Retrieves a list of all commands (native binaries + PowerShell commands) ending in "item"

Get-Help                                                  # Get all help topics
Get-Help -Name about_Variables                            # Get help for a specific about_* topic (aka. man page)
Get-Help -Name Get-Command                                # Get help for a specific PowerShell function
Get-Help -Name Get-Command -Parameter Module              # Get help for a specific parameter on a specific command

fnky

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

yelouafi

In this tutorial we're going to build a set of parser combinators.

What is a parser combinator?

We'll answer the above question in 2 steps.

1. What is a parser?
2. and, what is a parser combinator?

So first question: What is parser?

othiym23

How to figure out what the fuck is going on without social media.

Sourced breaking news

• The Washington Post
• The Guardian
• ProPublica
• The New Yorker
• The Economist
• The New York Times, I guess

Rich-Harris

Why imperative imports are slower than declarative imports

A lot of people misunderstood Top-level await is a footgun, including me. I thought the primary danger was that people would be able to put things like AJAX requests in their top-level await expressions, and that this was terrible because await strongly encourages sequential operations even though a lot of the asynchronous activity we're talking about should actually happen concurrently.

But that's not the worst of it. Imperative module loading is intrinsically bad for app startup performance, in ways that are quite subtle.

Consider an app like this:

// main.js

Rich-Harris

Edit — February 2019

This gist had a far larger impact than I imagined it would, and apparently people are still finding it, so a quick update:

• TC39 is currently moving forward with a slightly different version of TLA, referred to as 'variant B', in which a module with TLA doesn't block sibling execution. This vastly reduces the danger of parallelizable work happening in serial and thereby delaying startup, which was the concern that motivated me to write this gist
• In the wild, we're seeing (async main(){...}()) as a substitute for TLA. This completely eliminates the blocking problem (yay!) but it's less powerful, and harder to statically analyse (boo). In other words the lack of TLA is causing real problems
• Therefore, a version of TLA that solves the original issue is a valuable addition to the language, and I'm in full support of the current proposal, which you can read here.

I'll leave the rest of this document unedited, for archaeological