CMK MainasuK

It often be helpful to be able to debug memory usage in Swift on Linux, for example to debug memory leaks.

This is a quick overview of how to generate a report of memory usage for your Swift app. This guide will only show you how to generate the report, not how to analyze it, it might be written up in a blog post later.

Install Valgrind

First we need to install a tool called Valgrind, which is used to trace memory usage.

	// If you use self-size cell with stack view or Auto Layout.
	// Try this to change row height with animation

	// Assume you set the content heightConstraint which group in your stack view
	// Or other heightConstraint to make your cell self-size

	func changeRowHeight(in tableView: UITableView, at indexPath: IndexPath, with height: CGFloat) {
	tableView.beginUpdates()

	// Change your cell heightConstraint height

	//: The up to date code snippet (Xcode 8 beta 6) for List which comforms Collection — Advanced Swift

	import UIKit

	private enum ListNode<Element> {
	case end
	indirect case node(Element, next: ListNode<Element>)

	func cons(x: Element) -> ListNode<Element> {
	return .node(x, next: self)

	TableView<T> tableView;
	TableColumn<T, Boolean> booleanColumn;

	private void setupTableView() {
	tableView.setEditable(true);
	}

	private void setupTableViewColumn() {
	booleanColumn.setCellFactory(column -> new CheckBoxTableCell<>());
	booleanColumn.setCellValueFactory(cellData -> {

	import java.io.*;
	import java.math.BigInteger;
	import java.security.SecureRandom;

	/**
	* Created by MainasuK on 2017-5-9.
	*/
	public class RSA {

	// public key

	import Vapor
	import Glibc

	extension Droplet {
	func setupRoutes() throws {
	get("hello") { req in
	var json = JSON()
	try json.set("hello", "world")
	return json
	}

	import requests
	import pdfkit
	from bs4 import BeautifulSoup

	url = 'https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/SafariAppExtension_PG/index.html'
	pdfkit.from_url(url, 'out.pdf')

	import requests
	import sys
	from bs4 import BeautifulSoup
	from sys import stdin

	# usage:
	# echo 'https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/SafariAppExtension_PG/index.html' \| python3 document_urls.py

	# Use this script get link of pages for one apple programming guide document


	func startDownload() {
	let eoCategories = EONET.categories
	let downloadedEvents = eoCategories.flatMap { categories in
	return Observable.from(categories.map { category in
	EONET.events(forLast: 360, category: category)
	})
	}
	.merge(maxConcurrent: 2)
	let updatedCategories = eoCategories.flatMap { categories in

	[
	{
	"address": "0x4E84E9e5fb0A972628Cf4568c403167EF1D40431",
	"symbol": "$FFC",
	"decimal": 18,
	"type": "default"
	},
	{
	"address": "0xa024e8057eec474a9b2356833707dd0579e26ef3",
	"symbol": "$FYX",