vinothchandar

TL;DR :

• Was exploring if hyperspace can be used an alternative for our record/bloom indexes
• For the needle-in-a-haystack search i.e a single id out of all the records, hyperspace also seems to be not very effective atm (might not be suprising given the covered indexes recommendations so far).
• Our old workhorse BLOOM_INDEX still significantly outperforms. But we should really step on the gas for RFC-15 like efforts/RFC-08 to make this much faster

https://microsoft.github.io/hyperspace/docs/ug-quick-start-guide/

odersky

Principled Meta Programming for Scala

This note outlines a principled way to meta-programming in Scala. It tries to combine the best ideas from LMS and Scala macros in a minimalistic design.

• LMS: Types matter. Inputs, outputs and transformations should all be statically typed.

• Macros: Quotations are ultimately more easy to deal with than implicit-based type-lifting

• LMS: Some of the most interesting and powerful applications of meta-programming

szoio

package eventsourcing

import java.time.Instant

import cats._
import cats.data.Coproduct
import cats.free.{Free, Inject}
import cats.implicits._
import doobie.imports._
import fs2.Stream

jennybc

There are packages for this now!

2017-08-03: Since I wrote this in 2014, the universe, specifically Kirill Müller (https://github.com/krlmlr), has provided better solutions to this problem. I now recommend that you use one of these two packages:

• rprojroot: This is the main package with functions to help you express paths in a way that will "just work" when developing interactively in an RStudio Project and when you render your file.
• here: A lightweight wrapper around rprojroot that anticipates the most likely scenario: you want to write paths relative to the top-level directory, defined as an RStudio project or Git repo. TRY THIS FIRST.

I love these packages so much I wrote an ode to here.

I use these packages now instead of what I describe below. I'll leave this gist up for historical interest. 😆