Xue Yu KrisYu

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KrisYu / Eigen Cheat sheet

Created September 25, 2020 15:25 — forked from gocarlos/Eigen Cheat sheet

Cheat sheet for the linear algebra library Eigen: http://eigen.tuxfamily.org/

	// A simple quickref for Eigen. Add anything that's missing.
	// Main author: Keir Mierle

	#include <Eigen/Dense>

	Matrix<double, 3, 3> A; // Fixed rows and cols. Same as Matrix3d.
	Matrix<double, 3, Dynamic> B; // Fixed rows, dynamic cols.
	Matrix<double, Dynamic, Dynamic> C; // Full dynamic. Same as MatrixXd.
	Matrix<double, 3, 3, RowMajor> E; // Row major; default is column-major.
	Matrix3f P, Q, R; // 3x3 float matrix.

KrisYu / UIImage+PixelColor.swift

Created September 29, 2017 01:49 — forked from marchinram/UIImage+PixelColor.swift

iOS Swift UIImage subscript extension to get pixel color

	import UIKit

	extension UIImage {

	subscript (x: Int, y: Int) -> UIColor? {

	if x < 0 \|\| x > Int(size.width) \|\| y < 0 \|\| y > Int(size.height) {
	return nil
	}

KrisYu / observer.swift

Created March 13, 2017 20:43 — forked from starhoshi/observer.swift

Swift observer pattern.

	import Foundation

	protocol Observer {
	var id: String { get }
	func update(_ string: String)
	}

	extension Observer {
	func update(_ string: String) {
	print("\(type(of: self)) に届いた新しい値は \(string) です。")

KrisYu / observer.swift

Created March 13, 2017 20:43 — forked from starhoshi/observer.swift

Swift observer pattern.

	import Foundation

	protocol Observer {
	var id: String { get }
	func update(_ string: String)
	}

	extension Observer {
	func update(_ string: String) {
	print("\(type(of: self)) に届いた新しい値は \(string) です。")

KrisYu / RW.swift

Created February 14, 2017 00:09 — forked from mchirico/RW.swift

RW to file in swift

	//
	// RW.swift
	// Web
	//
	// Created by Mike Chirico on 10/15/15.
	// Copyright © 2015 Mike Chirico. All rights reserved.
	//

	import UIKit