loganpowell

Adapters

core.async

link to "the node way"

Basic I/O API function (example)

Create async functions with this - most flexible - API contract/signature. This is good for coordinating numerous asynchronous operations (e.g., networking effects/propogation, streaming events, etc.).

loganpowell

Keys

< : Publish to NPM

_ : wildcard < < : Publish to NPM and sub-component of wildcard

^ : Sub-component of function above

PseudoCode

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;; ------------------------

(defn- log-time [{:keys [ns name line]} f & args]
  (let [start   (System/nanoTime)
        res     (apply f args)
        elapsed (quot (- (System/nanoTime) start) 1000)]
    (log/debug (format "%s/%s:%s %dus" ns name line elapsed))
    res))

(defn enable-timing [var]

loganpowell

How to discard local commits in Git

git reset --hard origin/master

will remove all commits (and work) not in origin/master where origin is the repo name and master is the name of the branch.

Delete the most recent commit, keeping the work you've done:

git reset --soft HEAD~1

loganpowell

Pimping Up Your PowerShell & Cmder with Posh-Git, Oh-My-Posh, & Powerline Fonts

Backstory (TLDR)

I work as a full-stack developer at work. We are a Windows & Azure shop, so we are using Windows as our development platform, hence this customization.

For my console needs, I am using Cmder which is based on ConEmu with PowerShell as my shell of choice.

Yes, yes, I know nowadays you can use the Linux subsystem on Windows 10 which allow you to run Ubuntu on Windows. If you are looking for customization of the Ubuntu bash shell, check out this article by Scott Hanselman.

loganpowell

let standardJSON =
  <async fetch stats returns promise>
    .then(data => {
      let labels = data[0].map(datum => datum.toUpperCase());
      let rows = data.slice(1);
      let objArray = rows.map(row => { 
        return Object.assign(
           {},
           ...labels.map( (key, idx) => ({ [key]: row[idx] }) )
        );

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(defn deep-merge [v & vs]
  (letfn [(rec-merge [v1 v2]
            (if (and (map? v1) (map? v2))
              (merge-with deep-merge v1 v2)
              v2))]
    (if (some identity vs)
      (reduce #(rec-merge %1 %2) v vs)
      v)))

loganpowell

Deploying a subfolder to GitHub Pages

Sometimes you want to have a subdirectory on the master branch be the root directory of a repository’s gh-pages branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master branch alongside the rest of your code.

For the sake of this example, let’s pretend the subfolder containing your site is named dist.

Step 1

Remove the dist directory from the project’s .gitignore file (it’s ignored by default by Yeoman).

loganpowell

Communicating Between GraphQL Resolver Functions

TODO:

• Read DataLoader Source
• Check out Keechma's Dataloader and Graphql Builder... (video)
• Check out this example with GraphQL + Express + Dataloader

Overview

loganpowell

var fetch = require("node-fetch");
var WKT = require("terraformer-wkt-parser");
var ramda = require("ramda");
require("dotenv").load();

var testWKT = WKT.convert({
  type: "Polygon",
  coordinates: [
    [[100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0]],
    [[100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2]]