philsong’s gists

philsong / Liquidation_Permanent_Price_Impact.ipynb

Created September 7, 2021 10:55 — forked from sebjai/Liquidation_Permanent_Price_Impact.ipynb

Optimal Execution with linear and non-linear impact. Chapter 6 of Algorithmic and High-Frequency Trading (c) Cartea, Jaimungal, & Penalva, 2015 Cambridge University Press

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philsong / Bot.py

Created July 11, 2021 01:38 — forked from guiziyu/Bot.py

Elon Musk Twitter Trading Bot

	import time
	import os, io
	import urllib.request
	import tweepy
	from google.cloud import vision
	from google.cloud import vision_v1
	import urllib.parse, urllib.request
	import hashlib, hmac, time
	import requests

philsong / bellman.py

Created February 6, 2021 07:33 — forked from joninvski/bellman.py

Bellman ford python implementation

	import pdb
	"""
	The Bellman-Ford algorithm

	Graph API:

	iter(graph) gives all nodes
	iter(graph[u]) gives neighbours of u
	graph[u][v] gives weight of edge (u, v)
	"""

philsong / 0x5DE45A7985ae5828f153b635B872655222FdB9eC

Created October 20, 2017 10:08

0x5DE45A7985ae5828f153b635B872655222FdB9eC

philsong / RxBus.java

Created October 26, 2016 02:47 — forked from tatocaster/RxBus.java

RxBus singleton

	public class RxBus {
	private static RxBus instance = null;
	private final Subject<Object, Object> _bus = new SerializedSubject<>(PublishSubject.create());

	private static RxBus getInstance() {
	if (instance == null) {
	instance = new RxBus();
	}
	return instance;
	}

philsong / PermissionUtils.java

Created October 26, 2016 02:47 — forked from tatocaster/PermissionUtils.java

Utility class for access to runtime permissions.

	/**
	* Utility class for access to runtime permissions.
	*/
	public abstract class PermissionUtils {

	/**
	* Requests the fine location permission. If a rationale with an additional explanation should
	* be shown to the user, displays a dialog that triggers the request.
	*/
	public static void requestPermission(AppCompatActivity activity, int requestId,

philsong / RealPathUtil.java

Created October 26, 2016 02:47 — forked from tatocaster/RealPathUtil.java

Real Path Utility class for Android, works for all API

	public class RealPathUtil {

	public static String getRealPath(Context context, Uri fileUri) {
	String realPath;
	// SDK < API11
	if (Build.VERSION.SDK_INT < 11) {
	realPath = RealPathUtil.getRealPathFromURI_BelowAPI11(context, fileUri);
	}
	// SDK >= 11 && SDK < 19
	else if (Build.VERSION.SDK_INT < 19) {

philsong / pg_change_schema_owner.sh

Created October 10, 2015 01:51 — forked from bspkrs/pg_change_schema_owner.sh

Changes the owner on all tables, sequences, views, and functions in a PostgreSQL database with support for identifiers with whitespace and non-public schemas.

	#!/bin/bash

	usage()
	{
	cat << EOF
	usage: $0 options

	This script sets ownership for all tables, sequences, views, and functions for a given schema.
	Run this script as your postgres OS user.

philsong / Dockerfile

Last active August 29, 2015 14:28 — forked from andychase/Dockerfile

Faking XT Nodes for fun

	# Use the Ubuntu Linux distro as the base for this image
	FROM ubuntu
	# Install necessary build tools
	RUN apt-get update && apt-get upgrade --yes && apt-get install build-essential clang git --yes
	# Download and install PseudoNode
	RUN cd /root && git clone https://github.com/basil00/PseudoNode.git && cd ./PseudoNode && make
	# These two commands enable port 8333 to be routed and start the node by default
	EXPOSE 8333
	CMD ["bash", "-c", "cd /root/PseudoNode && ./pseudonode --stealth --coin=bitcoin-xt"]

philsong / genNonce.cpp

Last active August 29, 2015 14:06

计算符合pow要求的最小值

	CBlock block;
	block.nNonce = 2084731820;
	block.vtx.push_back(txNew);
	block.hashPrevBlock = 0;
	block.hashMerkleRoot = block.BuildMerkleTree();
	block.nVersion = 1;
	block.nTime = 1409745976;
	block.nBits = 0x1e0ffff0;

	#if 1

S. philsong