kborling

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  nix = {
    package = pkgs.nixUnstable;
    extraOptions = ''

chriseppstein

Sass/Less Comparison

In this document I am using Sass's SCSS syntax. You can choose to use the indented syntax in sass, if you prefer it, it has no functional differences from the SCSS syntax.

For Less, I'm using the JavaScript version because this is what they suggest on the website. The ruby version may be different.

Variables

OlegIlyenko

In this gist I would like to describe an idea for GraphQL subscriptions. It was inspired by conversations about subscriptions in the GraphQL slack channel and different GH issues, like #89 and #411.

Conceptual Model

At the moment GraphQL allows 2 types of queries:

• query
• mutation

Reference implementation also adds the third type: subscription. It does not have any semantics yet, so here I would like to propose one possible semantics interpretation and the reasoning behind it.

asukakenji

Go (Golang) GOOS and GOARCH

All of the following information is based on go version go1.17.1 darwin/amd64.

GOOS Values

GOOS	Out of the Box
aix	✅
android	✅

rubencaro

Golang installation guide

Since Golang version 1.11 this process is finally (almost) as easy as it should (!!). You can see full docs here. For older guides see here.

These are my notes, not a generic solution. They are not meant to work anywhere outside my machines. Update version numbers to whatever are the current ones while you do this.

Installing everything needed the first time

Install asdf and its golang plugin, then install golang

svanoort

# Base settings and GC logging
-server -XX:+AlwaysPreTouch  # First should be default, but we make it explicit, second pre-zeroes memory mapped pages on JVM startup -- improves runtime performance
# -Xloggc:gc-%t.log  # CUSTOMIZE LOCATION HERE - $path/gc-%t.log -- the %t in the gc log file path is so we get a new file with each JVM restart
-XX:NumberOfGCLogFiles=5 -XX:+UseGCLogFileRotation -XX:GCLogFileSize=20m # Limits the number of files, logs to folder 
-XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintHeapAtGC -XX:+PrintGCCause
-XX:+PrintTenuringDistribution -XX:+PrintReferenceGC -XX:+PrintAdaptiveSizePolicy # gather info on object age & reference GC time for further tuning if needed.

# G1 specific settings -- probably should be default for multi-core systems with >2 GB of heap (below that, default is probably fine)
-XX:+UseG1GC
-XX:+UseStringDeduplication

retronym

class A
class A2 extends A
class B

trait M[X]

//
// Upper Type Bound
//
def upperTypeBound[AA <: A](x: AA): A = x

andyhd

function maybe(value) {
  var obj = null;
  function isEmpty() { return value === undefined || value === null }
  function nonEmpty() { return !isEmpty() }
  obj = {
    map: function (f) { return isEmpty() ? obj : maybe(f(value)) },
    getOrElse: function (n) { return isEmpty() ? n : value },
    isEmpty: isEmpty,
    nonEmpty: nonEmpty
  }

knutwalker

package example.statemachine

import scalaz.{State, Scalaz}, Scalaz._

object FSM {
  def apply[I, S](f: PartialFunction[(I, S), S]): FSM[I, S] =
    new FSM((i, s) => f.applyOrElse((i, s), (_: (I, S)) => s))

  private def states[S, O](xs: List[State[S, O]]): State[S, List[O]] =
    xs.sequence[({type λ[α]=State[S, α]})#λ, O]

mguillermin

package sample.akka.testkit

import akka.actor.ActorSystem
import akka.actor.Actor
import akka.testkit.{TestKit, TestActorRef}
import org.scalatest.matchers.MustMatchers
import org.scalatest.WordSpec

class ImplicitSenderTest extends TestKit(ActorSystem("testSystem"))
  // Using the ImplicitSender trait will automatically set `testActor` as the sender