Developer Guide to Migrate Across Galaxies

Presentation given in App Builders 2017, Lausanne, Switzerland.

Speech:
https://akos.ma/blog/the-developer-guide-to-migrate-across-galaxies/

Transcript

1. Developer Guide To Migrate Across Galaxies.
3. Galaxies.
5. "2. Choose Your Galaxy Wisely"
6. "In our industry, every technology generates what I call a “galaxy.” These galaxies feature stars but also black holes; …
7. …meteoric changes that fade in the night, many planets, only a tiny fraction of which harbour some kind of life, and lots of cosmic dust and dark matter."
8. Religion.
9. Sociology.
10. 6 Galaxies.
11. In just half an hour.
12. Believe me.
13. Everything is connected.
14. 42.
15. 1. Perl, Python, PHP, Ruby. aka Babelia.
16. Quality software.
17. Actually…
18. Not.
19. Software rots.
20. Organic Software™®©.
21. Hipsters.
32. Software Vendors.
34. Windows-1252.
35. \lim_{k \to \infty}\frac{1}{k} = 0.
37. <math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> <munder> <mo form="prefix" movablelimits="true">lim</mo> <mrow class="MJX-TeXAtom-ORD"> <mi>k</mi> <mo stretchy="false">&#x2192;<!-- → --></mo> <mi mathvariant="normal">&#x221E;<!-- ∞ --></mi> </mrow> </munder> <mfrac> <mn>1</mn> <mi>k</mi> </mfrac> <mo>=</mo> <mn>0.</mn> </math>
39. 2017.
40. LibreOffice.
41. AbiWord.
43. Déjà Vu.
46. Apple Pages 2005.
47. Déjà Vu.
48. Markdown.
50. AsciiDoc.
51. UTF-8.
52. Գ΄Ӿ΄ᢚय़ ၹΨᎣΟͰ̶
54. Perl ➡ Markdown.
55. PHP ➡ Textile.
56. Python ➡ AsciiDoc.
57. Ruby ➡ AsciiDoctor.
58. Haskell ➡ Pandoc.
59. AsciiDoc, Markdown ➡ Pandoc ➡ PDF, Word, LibreOffice…
60. 2. VBScript. aka Apocalypsia.
61. On Error Resume Next Err.Raise 6 MsgBox CStr(Err.Number) & " " & Err.Description Err.Clear
70. "In earlier version of Visual Basic, functions without a "Return" statement just "Return None", without any kind of compiler warning (or error)…
71. Function Sum(value1, value2) Dim result result = value1 + value2 Sum = result End Function
73. "Oh man this sucked."
74. Class Customer Private m_CustomerName Private Sub Class_Initialize m_CustomerName = "" End Sub ' CustomerName property. Public Property Get CustomerName CustomerName = m_CustomerName End Property Public Property Let CustomerName(newValue) m_CustomerName = newValue End Property End Class Dim cust Set cust = New Customer cust.CustomerName = "Fabrikam, Inc." Dim s s = cust.CustomerName MsgBox (s)
75. "the ASP server is multithreaded and assigns a different thread to each page request (…). VBScript class instances (…) must run on the thread that created them."
76. "There is no notion of polymorphism or inheritance in VBScript 5.0 (…)"
77. "(…) VBScript classes are merely a way to group data and the operations on the data together to improve encapsulation."
78. "The four magic constants of the apocalypse: Nothing, Null, Empty, and Error."
79. Option Explicit Dim MyVar MyVar = 10 ' ... and your code explodes (because not declared)! MyInt = 10
80. VBRUN300.DLL. 400 KB.
81. .NET Framework. 23 MB4. 4 https://www.microso!.com/en-us/download/details.aspx?id=26
82. Swift. 8 – 15 MB5. 5 http://stackoverflow.com/q/28275711/133764
83. Kotlin. 858 KB2. 2 https://kotlinlang.org/docs/tutorials/kotlin-android.html
84. 3. C++. aka Paradigmia.
87. Macros Multiple inheritance. Template Metaprogramming. Standard Template Library.
88. Multiple Inheritance.
89. !.
90. Once Again.
91. Everybody.
92. Multiple. Inheritance.
93. !.
94. Interfaces & Protocols. are. Abstract Classes with Virtual Methods.
95. Cut And Paste.
96. 500 KLOC.
97. 4 hours build.
98. (Do. Not. Clean.)
99. 4000 Tests.
100. VBScript ➡ Excel.
102. 4. Objective-C. aka Coolia.
106. Seat<Language<EastCoast>>
107. std::map<std::obnoxious<std::language>, std::vector<seat>>
108. Cup<Tea>.
109. public: external auto static auto auto(auto &ref) [&auto] { return auto_cast<auto> (*auto) auto; }
112. !.
118. exampleWithNumber: x | y | true & false not & (nil isNil) ifFalse: [self halt]. y := self size + super size. #($a #a "a" 1 1.0) do: [ :each | Transcript show: (each class name); show: ' ']. ^x < y
122. Person *p = [[Person alloc] init]; p.name = @"Steve"; NSLog([p valueForKey:@"name"]);
124. (secret)
126. ABI
127. 5. JavaScript. aka Undefinedia.
129. V10 = Lars_Bak(JavaScript);
132. CoffeeScript, LiveScript, TypeScript, Kotlin, UberScript, ToffeeScript, Mascara, Objective-J, Script#…
133. 6. Swift. aka Migrania.
135. JVM.
136. CLR.
137. ABI.
138. COM.
139. "…a binary-interface standard for software components introduced by Microsoft in 1993 (…)"
140. "(…) used to enable inter-process communication and dynamic object creation in a large range of programming languages."
143. HRESULT CMyMAPIObject::QueryInterface (REFIID riid, LPVOID * ppvObj) { // Always set out parameter to NULL, validating it first. if (!ppvObj) return E_INVALIDARG; *ppvObj = NULL; if (riid == IID_IUnknown || riid == IID_IMAPIProp || riid == IID_IMAPIStatus) { // Increment the reference count and return the pointer. *ppvObj = (LPVOID)this; AddRef(); return NOERROR; } return E_NOINTERFACE; }
144. Reference Counting! ULONG CMyMAPIObject::AddRef() { InterlockedIncrement(m_cRef); return m_cRef; } ULONG CMyMAPIObject::Release() { // Decrement the object's internal counter. ULONG ulRefCount = InterlockedDecrement(m_cRef); if (0 == m_cRef) { delete this; } return ulRefCount; }
145. F#, JRuby, Kotlin, Scala.
146. LLVM.
147. !
148. Xcode Migration Assistants.
149. File Radars.
150. Crash.
151. iCloud.
152. reStructuredText ➡ Markdown.
154. iTunes.
155. CPU.
156. Memory.
157. Hog.
158. Merging Storyboards.
159. Touch Bar.
161. 7. Local Cluster. aka Here. Now.
162. "My recommendation to you is"
163. "(…) choose your galaxy wisely, (…) keep your telescope pointed towards the other galaxies, and prepare to make a hyperjump to other places if needed."
164. Convergence.
165. C++17. PHP 7. C# 6. ES 6. Java 9. Kotlin 1.1. Swi! 3.1. Scala 2.12.
166. य़ݶੜ吖
167. Lambdas. Type inference. Traits / default methods / protocol extensions / multiple inheritance / mixins / optional interface implementations. Categories / extensions.
170. Singularity.
171. Πάντα χωρεῖ καὶ οὐδὲν µένει — Ἡράκλειτος
172. Everything changes and nothing stands still. — Heraclitus of Ephesus (535 - 475 BC)
173. "Plus ça change, plus c'est la même chose." — Jean-Baptiste Alphonse Karr (1808 - 1890)
175. Micromanagement. No accessibility. Discrimination. Pseudoscrum. Open Spaces. Harassment. No testing. Burnout.
176. 8. Guardians of the Galaxy aka You.
177. Ownership.
178. Empathy.
179. Refuse jobs without inclusion and diversity.
180. Refuse jobs in open spaces.
181. Do not release code without tests.
182. Do not release unaccessible apps.
183. Do not accept bullshit from App Store owners.
184. Do not jump into proprietary lock-in.
185. It is not the programming language. It is not the frameworks. It is not the patterns. It is us.
187. Trip > Destination.
188. ᜰ澆氱์
189. @akosma. aka Me.
190. Thanks.