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Week 28 - 2019

The weeknote for 7/8 - 7/14.

OSS

denoland/deno

🦕 Deno is a new JavaScript and TypeScript runtime.

• Contributions
  • https://github.com/denoland/deno/pull/2643
    • Added onload and load event handling to window object. This feature is inspired by the load event of the browsers. We can use window.onload as the main entrypoint of the script.

window.onload = async function() {
  const res = await fetch(Deno.args[1]);
  console.log(await res.text());
};

This script shows the contents from the url given from the command line argument. There is no explicit call of onload function above, but it's called automatically by the system when the script is loaded.

Job

s3sync

♻️ s3sync is a Golang utility for syncing between s3 and local.

• We, engineers at SEQSENSE, created and open sourced s3sync, a small golang utility for syncing between s3 and local disks. The similar function is available as AWS cli's subcommand aws s3 sync, but we need more efficient one in regards to the size and speed for using it in our robots. So we created this library.
• Special thing about the testing of this library was that we first used localstack for testing. Localstack is a mock implementation of AWS and can be used as a 'fake' AWS in testing environment. We set up the testing of this library using localstack. That simplified our test code significantly.

Event

TS meetup #2

• We, TypeScript users near Tokyo, gathered in Folio's office and listened to the talks about TypeScript. @mizchi's talk was the most accessible to the beginners of TypeScript like me. @takepepe's talk was by far the most high-level and excellent. @Quramy talked about the graphql support of the typescript language server. He introduced his tool ts-graphql-plugin and described how he approached when he created this tool.
• By the way, Folio's conference room is terrible (maybe the worst among the places I've ever been). Why did the room's designer place the screen from the ground level? The audience can see only the top 20% of the screen (!) unless they are in the front row.

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