Lynn Zheng RuolinZheng08

SWE @ Salesforce | Hobbyist Game Dev @ freeCodeCamp | CS BS/MS + Statistics BA @ UChicago Class of 2021

410 followers · 0 following

University of Chicago
San Francisco, CA
https://ruolinzheng08.github.io
@lynnzheng08

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RuolinZheng08 / epidemic_network.ipynb

Last active January 31, 2021 20:59

[Python, Statistics] An SIR (Susceptible, Infected and Recovered) Network Example

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RuolinZheng08 / permutation_test.ipynb

Created January 31, 2021 20:45

[Python, Statistics] Permutation Test

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RuolinZheng08 / tree_traversal_template.py

Created November 20, 2020 15:19

[Algo] Tree Traversal Template

	# DFS
	def preorder(self, root):
	if not root:
	return []
	ret = []
	stack = [root]
	while stack:
	node = stack.pop()
	ret.append(node.val)
	if node.right:

RuolinZheng08 / graph_traversal_template.py

Last active July 1, 2022 13:54

[Algo] Graph Traversal Template

	# Iterative
	def dfs(graph, start):
	visited, stack = set(), [start]
	while stack:
	node = stack.pop()
	visited.add(node)
	for neighbor in graph[node]:
	if not neighbor in visited:
	stack.append(neighbor)
	return visited

RuolinZheng08 / backtracking_template.py

Last active September 9, 2024 08:42

[Algo] Backtracking Template & N-Queens Solution

	def is_valid_state(state):
	# check if it is a valid solution
	return True

	def get_candidates(state):
	return []

	def search(state, solutions):
	if is_valid_state(state):
	solutions.append(state.copy())

RuolinZheng08 / CreatorDefinedDisplayable.rpy

Last active July 1, 2022 13:54

[Ren'Py, Template] Creator-Defined Displayable

	class CreatorDefinedDisplayable(renpy.Displayable):

	def __init__(self):
	super(CreatorDefinedDisplayable, self).__init__()

	def render(self, width, height, st, at):
	render = renpy.Render(width, height)
	return render

	def event(self, ev, x, y, st):

RuolinZheng08 / sudoku_solver.py

Created August 9, 2020 21:43

[Python] Sudoku Solver | CodePath Dynamic Programming & Backtracking Project

	from itertools import product

	class SudokuSolver:
	"""
	Solve a sudoku puzzle given as a 81-digit string with . denoting empty
	"""

	SHAPE = 9
	GRID = 3
	EMPTY = '.'

RuolinZheng08 / HtmlToPdf.java

Last active February 8, 2023 04:50

[Java] HTML (to XHTML) then to PDF with CSS 2.1 Support | Flying Saucer + OpenPDF

	import java.io.*;
	import org.jsoup.Jsoup;
	import org.jsoup.nodes.Document;
	import org.xhtmlrenderer.extend.FontResolver;
	import org.xhtmlrenderer.pdf.ITextRenderer;

	public class HtmlToPdf {
	public static void main(String[] args) throws IOException {
	String html = "<h1>hello</h1>";
	String xhtml = htmlToXhtml(html);

RuolinZheng08 / index.html

Last active January 31, 2021 20:47

[Template] Dummy index.html for GitHub repo page

	<!DOCTYPE html>
	<html>
	<head>
	<title></title>
	<!-- Just a dummy html to redirect to my subdirectory -->
	<meta http-equiv="refresh" content="0; url=[INSERT URL HERE]">
	</head>
	<body>

	</body>

RuolinZheng08 / mfcc.py

Last active January 31, 2021 20:47

[Python] Mel-frequency Cepstrum

	from IPython.display import Audio

	import numpy as np
	from numpy.fft import fft, ifft

	from scipy.fftpack import dct, idct
	from scipy.signal import stft

	import soundfile as sf

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