## WEBPACK 5 WHY BREAKING CHANGES? A CHANGELOG ONLY TELLS HALF OF THE STORY TOBIAS KOPPERS ## TOBIAS KOPPERS • GITHUB: @sokra • TWITTER: @wSokra • 2012: I CREATED WEBPACK. • SINCE 2017: I WORK FULL-TIME WEBPACK 5 IS COMING. • OH NO THERE ARE BREAKING CHANGES. • THIS MAY BREAK MY BUILD. • I NEED TO INVEST TIME TO FIX IT. • WHY ARE THERE BREAKING CHANGES ANYWAY...? ## THE "WHY" • THIS TALK IS BREAKING CHANGES • BONUS: YOU GET TO KNOW THE BREAKING CHANGES. JUST TO BE PREPARED. • BONUS: YOU SEE THE BENEFITS OF THESE CHANGES ## MAJOR RELEASING - PEOPLE TEND TO DISLIKE BREAKING CHANGES • NOBODY

Channels ..... 312 24.3 More task operations ..... 316 24.4 Tasks and events ..... 316 25 Multi-Threading 318 25.1 Starting Julia with multiple threads 318 25.2 Threadpools 320 25.3 The @threads 1092 48.3 Channels 1102 48.4 Low-level synchronization using schedule and wait 1108 49 Multi-Threading 1110 49.1 Atomic operations 1116 49.2 ccall using a libuv threadpool (Experimental) 1127 runtime ..... 1877 105.18 Bounds checking ..... 1879 105.19 Proper maintenance and care of multi-threading locks ..... 1881 105.20 Arrays with custom indices ..... 1885 105.21 Module loading ....

Communicating with Channels 315 24.3 More task operations 319 24.4 Tasks and events ..... 320 25 Multi-Threading ..... 321 25.1 Starting Julia with multiple threads ..... 321 25.2 Threadpools ..... 323 Channels ..... 1145 49.4 Low-level synchronization using schedule and wait ..... 1152 50 Multi-Threading 50.1 Atomic operations ..... 1161 50.2 ccall using a libuv threadpool (Experimental) ... runtime ..... 1931 106.18 Bounds checking ..... 1933 106.19 Proper maintenance and care of multi-threading locks ..... 1935 106.20 Arrays with custom indices ..... 1938 106.21 Module loading ....

Notes 5 2 New language features 7 3 Language changes 9 4 Command-line option changes 11 5 New library functions 13 6 Standard library changes 15 Dates 16 InteractiveUtils 16 265 29 Parallel Computing ..... 267 30 Coroutines ..... 269 30.1 Channels ..... 269 31 Multi-Threading (Experimental) 273 31.1 Setup 273 31.2 The @threads Macro 273 31.3 Atomic Operations 274 and permutation 688 55.7 Array functions 701 55.8 Combinatorics 710 56 Tasks 715 57 Multi-Threading 723 57.1 ccall using a threadpool (Experimental) 728 57.2 Synchronization Primitives 728

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2693 4.1.4 Contributing your changes to pandas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2694 4.1.5 Tips for a successful pandas documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2719 4.3.4 Previewing changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2720 4.4 Contributing vs. in place operations Most pandas operations return copies of the Series/DataFrame. To make the changes “stick”, you’ll need to either assign to a new variable: sorted_df = df.sort_values("col1") or overwrite

Triggers ..... 1289 39.1. Overview of Trigger Behavior ..... 1289 39.2. Visibility of Data Changes ..... 1292 39.3. Writing Trigger Functions in C ..... 1293 39.4. A Complete Trigger Example Memory Management ..... 1511 47.4. Transaction Management ..... 1521 47.5. Visibility of Data Changes ..... 1524 47.6. Examples ..... 1524 48. Background Worker Processes ..... 1528 49. Logical Message Fields ..... 2460 55.9. Logical Replication Message Formats ..... 2462 55.10. Summary of Changes since Protocol 2.0 ..... 2471 56. PostgreSQL Coding Conventions ..... 2473 56.1. Formatting

☐ Concepts ☐ Lambda Expression Changes • [=, this] as Lambda Capture • Templated Lambda Expressions • Pack Expansion in Lambda Captures ☐ constexpr Changes • virtual functions • union, try/catch try/catch, dynamic_cast, typeid • allocations • constexpr string & vector ☐ Concurrency Changes • Atomic Smart Pointers • Joining & Cancellable Threads • The C++20 Synchronization Library  "How C++20 Changes the Way We Write Code" -- Timur Doumler Friday, September 18 • 12:00

Notes 2 New language features 3 Language changes 4 Multi-threading changes 5 Build system changes 6 New library functions 7 Standard library changes Libdl LinearAlgebra SparseArrays Dates 271 31 Parallel Computing ..... 273 32 Coroutines ..... 275 32.1 Channels ..... 275 33 Multi-Threading (Experimental) ..... 279 33.1 Setup ..... 279 33.2 The @threads Macro ..... 279 33.3 Atomic 57.8 Combinatorics ..... 739 58 Tasks ..... 743 59 Scheduling ..... 749 60 Multi-Threading ..... 757 60.1 ccall using a threadpool (Experimental) ..... 762 61 Low-level synchronization

Incompatible API changes with version 6.0 ..... 423 13.2 Incompatible API changes with version 5.x ..... 424 13.3 Incompatible API changes with version 5.0 ..... 424 13.4 Incompatible API changes with version Incompatible API changes with version 4.2 ..... 429 13.6 Incompatible API changes with version 4.1 ..... 430 13.7 Incompatible API changes with version 4.0 ..... 431 13.8 Incompatible API changes with version Incompatible API changes with version 3.1 ..... 434 13.10 Incompatible API changes with version 3.0 436 13.11 Incompatible API changes with version 2.2 436 13.12 Incompatible API changes with version 2