Nate dinhnhat0401

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

	const puppeteer = require('puppeteer');

	const escapeXpathString = str => {
	const splitedQuotes = str.replace(/'/g, `', "'", '`);
	return `concat('${splitedQuotes}', '')`;
	};

	const clickByText = async (page, text) => {
	const escapedText = escapeXpathString(text);
	const linkHandlers = await page.$x(`//a[contains(text(), ${escapedText})]`);

	import XCTest

	extension XCTestCase {

	/// Simple helper for asynchronous testing.
	/// Usage in XCTestCase method:
	/// func testSomething() {
	/// doAsyncThings()
	/// eventually {
	/// /* XCTAssert goes here... */

	cmake_minimum_required( VERSION 3.0 )
	project( so-opencv-calibration )

	find_package( OpenCV 3.0.0 EXACT REQUIRED )
	set( INPUT_FILENAME "${CMAKE_CURRENT_LIST_DIR}/input_00.png" ) # Input file, e.g. http://i.stack.imgur.com/WjER0.png

	add_executable( mwe mwe.cpp )
	target_compile_definitions( mwe PRIVATE -DINPUT_FILENAME="${INPUT_FILENAME}" )
	target_include_directories( mwe PRIVATE ${OpenCV_INCLUDE_DIRS} )
	target_link_libraries( mwe ${OpenCV_LIBS} )

	/**
	* WkHtmlToPdf table splitting hack.
	*
	* Script to automatically split multiple-pages-spanning HTML tables for PDF
	* generation using webkit.
	*
	* To use, you must adjust pdfPage object's contents to reflect your PDF's
	* page format.
	* The tables you want to be automatically splitted when the page ends must
	* have a class name of "splitForPrint" (can be changed).

	/*
	* To compile objective-c on the command line:
	*
	* gcc -framework Foundation objc-gcc.m
	*
	* You may have to link with -lobjc or other libs,
	* as required.
	*/

	#import <Foundation/Foundation.h>