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@tj
tj / main.go
Last active April 10, 2017 06:58
package main
import (
"fmt"
"net/http"
"github.com/apex/go-apex"
"github.com/apex/go-apex/proxy"
)
@ChrisChares
ChrisChares / AsyncAwaitGenerator.md
Last active September 30, 2022 13:26
async/await with ES6 Generators & Promises

async/await with ES6 Generators & Promises

This vanilla ES6 function async allows code to yield (i.e. await) the asynchronous result of any Promise within. The usage is almost identical to ES7's async/await keywords.

async/await control flow is promising because it allows the programmer to reason linearly about complex asynchronous code. It also has the benefit of unifying traditionally disparate synchronous and asynchronous error handling code into one try/catch block.

This is expository code for the purpose of learning ES6. It is not 100% robust. If you want to use this style of code in the real world you might want to explore a well-tested library like co, task.js or use async/await with Babel. Also take a look at the official async/await draft section on desugaring.

Compatibility

  • node.js - 4.3.2+ (maybe earlier with
@joshenders
joshenders / nodejs.md
Last active November 30, 2023 00:32
How to patch the NodeJS binary to write perfdata to a path other than /tmp

Background

The current verison of NodeJS hardcodes the path where perf data is written when the --perf-basic-prof flag is used.

https://github.com/v8/v8/blob/061c2ab23a1d4cd192b935e7912e7dfb1fed845d/src/log.cc#L236

At Pinterest, /tmp has limited capacity and so we weren't able to utilize perf data to troubleshoot NodeJS without filling the disk and crashing the running system.

How to patch

First I'll copy the system node binary to my local directory so this set of actions isn't destructive to the running system:

@printercu
printercu / rails-5.0-integration-tests-speedup.md
Last active March 7, 2022 01:20
Speed up Rails 5 integration tests

Speed up integration tests in Rails 5 app

Rails 5 recompiles templates on every request in test env. Fix will be released only in 5.0.2.

Add this lines to test helper to get the performance now (I've got x2 improvement):

class << ActionView::LookupContext::DetailsKey
 def clear
@wrobstory
wrobstory / postgres_to_redshift.csv
Created August 25, 2016 20:10
Postgres --> Redshift types via http://docs.aws.amazon.com/dms/latest/userguide/CHAP_Reference.Target.PostgreSQL.DataTypes.html
PostgreSQL Data Types AWS DMS Data Types Redshift Data Types
INTEGER INT4 INT4
SMALLINT INT2 INT2
BIGINT INT8 INT8
NUMERIC (p,s) If precision is 39 or greater, then use STRING. If the scale is => 0 and =< 37 then: NUMERIC (p,s) If the scale is => 38 and =< 127 then: VARCHAR (Length)
DECIMAL(P,S) If precision is 39 or greater, then use STRING. If the scale is => 0 and =< 37 then: NUMERIC (p,s) If the scale is => 38 and =< 127 then: VARCHAR (Length)
REAL REAL4 FLOAT4
DOUBLE REAL8 FLOAT8
SMALLSERIAL INT2 INT2
SERIAL INT4 INT4
@jarednorman
jarednorman / webpack-rails-3.markdown
Created February 22, 2016 08:16
Webpack with Rails Part 3: Rake vs RSpec

Webpack with Rails Part 3: Rake vs RSpec

In part 2 we set up a Rake task to run webpack, ensuring that most deploy systems would build our entries for us.

I missed that we needed the webpack Rake task to be run before feature tests too. Without this, we need to run the task manually before running our test suite to avoid erroneous failures due to the assets not being up to date. Running Rake tasks from anywhere in your application in relatively easy, but we

@jarednorman
jarednorman / webpack-rails-2.markdown
Last active February 19, 2017 20:48
Webpack with Rails Part 2: Precompile Harder

Webpack with Rails Part 2: Precompile Harder

Note: This article is more generally about how to add dependencies to a Rake task, and why you might want to do that.

If you followed my previous article on webpack and Rails, you might have built yourself a trendy little React app. Then you tried to deploy it, and that didn't work, did it?

@rauschma
rauschma / callables.md
Last active April 16, 2018 19:43

Cheat sheet for callable entities in ES6

Value:

FD FE AF C M
Function-callable ✓ ✓ ✓ × ✓
Constructor-callable ✓ ✓ × ✓ ×
Prototype F.p F.p F.p SC F.p
Property prototype ✓ ✓ × ✓ ×
@diegoconcha
diegoconcha / redux_egghead_notes.md
Last active January 18, 2022 13:23
Redux Egghead.io Notes

###Redux Egghead Video Notes###

####Introduction:#### Managing state in an application is critical, and is often done haphazardly. Redux provides a state container for JavaScript applications that will help your applications behave consistently.

Redux is an evolution of the ideas presented by Facebook's Flux, avoiding the complexity found in Flux by looking to how applications are built with the Elm language.

####1st principle of Redux:#### Everything that changes in your application including the data and ui options is contained in a single object called the state tree

@iammerrick
iammerrick / README.md
Last active February 2, 2023 19:58

Redux Chaos Monkey

This is a proof of concept which allows you to replay system events in a random order each time to make sure your UI can tolerate variable states.

I'm not sure if this is worthy of its on open source project with additional features like changing play back time, whitelisting/blacklisting actions etc but figured I'd put this out there to see if it piques anyones interest.

See a video of this in action here: [https://www.youtube.com/watch?v=wkoukONfwmA](Video on YouTube).