pwm

{-# OPTIONS_GHC -Wall #-}

-- An example of representing a connection

-- Types
data ConnInfo = ConnInfo
    { connState :: ConnState
    , server    :: String
    } deriving (Show)

pythoninthegrass

#!/usr/bin/env bash
# SOURCE: https://eligiblestore.com/blog/2017/05/02/how-to-install-mosh-on-centos/

# ensure running as root
if [[ "$(id -u)" != "0" ]]; then
  exec sudo "$0" "$@"
fi

# install mosh
yum install -y epel-release

bryanhuntesl

verify distributed Erlang working

Ping the riak node, print the response and halt the system.

erl -setcookie riak -name "${USER}-"@127.0.0.1 -noshell \
-eval "Res = net:ping('dev1@127.0.0.1'), io:put_chars(standard_error,io_lib:format(\"~p\",[Res]))." \
-eval "erlang:halt()."

As a result, pong is printed to the console, the response from the remote node, we're ready to start executing Erlang.

santisbon

Enter this in the search box along with your search terms:

Get all gists from the user santisbon.
user:santisbon

Find all gists with a .yml extension.
extension:yml

Find all gists with HTML files.
language:html

stewartpark

---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: oom-killer
  namespace: kube-system
  labels:
    k8s-app: oom-killer
spec:
  selector:

dlants

-- an example of how to derive a show instance for a Maybe type
-- not totally sure why `derive instance showMyMaybe :: (Show a) => Show (MyMaybe a)` errors with...
-- error: CannotDerive :
-- Cannot derive a type class instance for Data.Show.Show (MyMaybe a) since instances of this type class are not derivable.
module Main where

import Prelude

import Control.Monad.Eff (Eff)
import Control.Monad.Eff.Console (CONSOLE, log)

justinwoo

Differences of Purescript from Elm

The syntax between Elm and Purescript are mostly the same, to the point where most Elm code can be converted to Purescript with copy-pasting and find-replace/multi-cursor editing.

Purpose of this document

Many people who have used Elm who are curious about/have tried/are using Purescript have asked me to put together a "differences from Elm" post to help them, and which I would also have found helpful.

Type Annotations

jFransham

Achieving warp speed with Rust

Contents:

• Number one optimization tip: don't
• Never optimize blindly
• Don't bother optimizing one-time costs
• Improve your algorithms
• CPU architecture primer
• Keep as much as possible in cache
• Keep as much as possible in registers

Angarsk8

port module App exposing (..)

import Html exposing (Html, Attribute, div, span, ul, li, input, text, programWithFlags)
import Html.Attributes exposing (style, autofocus, placeholder, value)
import Html.Events exposing (on, keyCode, onInput)
import Json.Decode as Decode
import Json.Encode as Encode
import Json.Decode.Pipeline exposing (decode, required)
import Dom.Scroll exposing (toBottom)
import Task

AtulKsol

psql: FATAL: Peer authentication failed for user “postgres” (or any user)

The connection failed because by default psql connects over UNIX sockets using peer authentication, that requires the current UNIX user to have the same user name as psql. So you will have to create the UNIX user postgres and then login as postgres or use sudo -u postgres psql database-name for accessing the database (and psql should not ask for a password).

If you cannot or do not want to create the UNIX user, like if you just want to connect to your database for ad hoc queries, forcing a socket connection using psql --host=localhost --dbname=database-name --username=postgres (as pointed out by @meyerson answer) will solve your immediate problem.

But if you intend to force password authentication over Unix sockets instead of the peer method, try changing the following pg_hba.conf* line:

from