Skip to content

Instantly share code, notes, and snippets.

View a-r-d's full-sized avatar
🍌

Aaron Decker a-r-d

🍌
86 followers · 69 following
View GitHub Profile
@a-r-d
a-r-d / hold-tlt-version.py
Last active May 18, 2021 13:40
QuantConnect - simple MACD strategy against SPY, 50/150 day cross, long and short, leverage is none
import numpy as np
### <summary>
### Basic template algorithm simply initializes the date range and cash. This is a skeleton
### framework you can use for designing an algorithm.
### </summary>
class BasicTemplateAlgorithm(QCAlgorithm):
'''Basic template algorithm simply initializes the date range and cash'''
def Initialize(self):
@a-r-d
a-r-d / memory.md
Created January 30, 2018 16:15
A million ways to change HEAP memory in Java

Xmx vs Xms

Remember, Xmx corresponds to max heap and Xms corresponds to starting heap. It can be an optimization to set these equal.

In Spring Boot build.gradle

bootRun {
      jvmArgs = ['-Xmx1g']
}
@a-r-d
a-r-d / traverse.js
Created December 7, 2017 01:12
traverse objects iteratively
function traverse(obj) {
var stack = [];
var i = 0;
stack.push(obj);
while (stack.length) {
for (var j in stack[0]) {
i++;
if (typeof stack[0][j] === 'object') {
@a-r-d
a-r-d / async-await.js
Created November 18, 2017 03:06
Async Await gentle introduction
// function that returns a promise
function getAMessage() {
return new Promise(resolve => {
setTimeout(() => {
resolve("passing this value back...");
}, 2000);
});
}
// function is marked async
@a-r-d
a-r-d / gist:f68a6999565f9426a89397a68c5f81ba
Created August 6, 2017 23:43
Ethereum test address
0x683A802cB2346CB769dd0E3D7FaCcf08d1073fBE
@a-r-d
a-r-d / ExampleMultipleStringsToList.java
Created November 22, 2016 19:50
An example of converting multiple lines to single array split on space chars.
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
public class ExampleMultipleStringsToList {
public static void main(String[] args) {
// read in a line
Scanner scanner = new Scanner(System.in);
@a-r-d
a-r-d / IteratorExample.java
Created November 20, 2016 21:22
Just a quick java iterator example.
// assume some stuff like this exists
ArrayList<String> lines = ...
BufferedWriter writer = ...
// get your iterator instance.
Iterator<String> iterator = lines.iterator();
String write = null;
// iterate + check inside of the while loop condition test.
while (iterator.hasNext() && (write = iterator.next()) != null) {
@a-r-d
a-r-d / index.html
Last active June 24, 2022 14:34
canvas sprite sheet demo
<html>
<head>
<title>Canvas Boilerplate</title>
<style type="text/css">
*,html{
margin: 0;padding: 0;
}
canvas {
width: 100%;
@a-r-d
a-r-d / index.html
Last active August 27, 2016 17:03 — forked from anonymous/index.html
JS Bin// source http://jsbin.com/jaleyewudo
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JS Bin</title>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/components/core-min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/hmac-sha1.js"></script>
</head>
@a-r-d
a-r-d / ssh-tunnel.sh
Last active January 29, 2018 11:07
how to open a remote tunnel for cassandra
# cassandra runs on 9042 for devCenter management
# expose it (9999 locally) running on a remote server locally:
ssh -L 9999:localhost:9042 -f -N remoteuser@remotehost