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Eth wrangling.

justin j. moses justinjmoses

Eth wrangling.
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justinjmoses / gist:3987610
Created Oct 31, 2012
delete used remote branches
View gist:3987610
git branch -r --merged master | sed 's/ *origin\///' | grep -v 'master$' | xargs -I% git push origin :%
justinjmoses / gist:3987615
Created Oct 31, 2012
git remove local merged branches
View gist:3987615
git branch --merged master | grep -v 'master$' | xargs git branch -d
justinjmoses /
Created Mar 11, 2016
Echo 5 lines before and after line in a file
#Usage echoline LINE_NUMBER FILE
function echoline() { sed -n "$(($1 - 5)),$(($1 + 5))p" $2; }
justinjmoses / App.js
Last active Oct 6, 2016
Navigator in react-native
View App.js
import Start from './Start'
import NextPage from './NextPage'
const Views = { Start, NextPage }
initialRoute={{ view: 'Start' }}
renderScene={(route, navigator) => {
const SceneComponent = Views[route.view];
return <SceneComponent {...route.props} navigator={navigator} />;
justinjmoses /
Last active Feb 16, 2017
Create dynamic objects in a nodejs6 REPL with Proxy

#Create dynamic objects in a nodejs6 REPL with Proxy

Nodejs 6.x comes with ES6 Proxy support baked in. Just like Ruby's method-missing (aka ghost methods), you can intercept getters and setters on an object and, like ActiveRecord in Rails, write rich APIs that can take any method or property name you like.

They are particularly fun in a REPL, where you might want to handle undefined variables.

For example, say we started a nodejs REPL via:

View index.html
<!DOCTYPE html>
<meta charset="utf-8"/>
<title>es6 proxy #jsbench #jsperf</title>
<script src=""></script>
<script src="./suite.js"></script>
<h1>Open the console to view the results</h1>
justinjmoses /
Last active Mar 28, 2017
Git show branches with most recent commits
# via
git for-each-ref --sort=committerdate refs/heads/ --format="%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(contents:subject) - %(authorname) (%(color:green)%(committerdate:relative)%(color:reset))"
justinjmoses / Deferred.js
Last active May 11, 2018
Migrating to jQuery 3 Promises A+
View Deferred.js
module.exports = class Deferred {
constructor() {
this._promise = new Promise((resolve, reject) => {
this._resolve = resolve;
this._reject = reject;
resolve(value) {
justinjmoses / EOS Smart Contract
Last active Nov 12, 2018
Getting started writing Smart Contracts with EOS
View EOS Smart Contract

Getting started writing Smart Contracts with EOS

This information has been extrapolated from

Latest version of EOS when writing: 1.4.0

Note: the Developer Portal has a number of older links inside it. Some of the URLs contain older version numbers. For example, if you use the breadcrumbs at the top, things can get confusing as the latest version shows as v1.3.0 which has different C++ syntax due to the latest changes in eosio.cdt )Contract Development Toolkit)

Environment Setup

justinjmoses / random-split.js
Created Dec 4, 2018
Function to split up some given number into a fixed number of parts.
View random-split.js
const random = require('random-js')();
// Splits up number into times random parts
const splitter = (number, times) => {
const ran = random.real(0, number);
if (times < 2) {
return [number];
const halved = times / 2;
if (times % 2 === 0) {
You can’t perform that action at this time.