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FCP Code Resources

This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional. It is laid out as follows:

  • Scala contains all the Scala code used in the book. Illustrations are organized by chapter and section. Code snippets that are not standalone classes or functions are implemented as demos. Demos sometimes rely on arguments for data that is not mentioned in the book. Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code. Some unit tests are written using Scalatest. Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable. You are advised to stay away from them.

  • Java contains almost all the Java code used in the book (see MoreJava for exceptions). This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.

  • MoreJava contains additional Java code that is not part of the sbt project:

    • Code from Chapter 14 that uses Java records. Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.

  • Kotlin contains all the Kotlin code. It is setup as a gradle project, independent from the main sbt project.

  • Python contains (very little) Python code, with no particular setup.

  • JavaScript contains (very little) JavaScript code, with no particular setup.

  • Bash contains (very little) Bash script code, with no particular setup.

The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ. The project specifies the following dependencies:

  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).

The last four dependencies are used only in Chapter 27.

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Resources for the book "Functional and Concurrent Programming"

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
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FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
About
Resources for the book "Functional and Concurrent Programming"
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
19 stars
Watchers
3 watching
Forks
3 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
About
Resources for the book "Functional and Concurrent Programming"
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
19 stars
Watchers
3 watching
Forks
3 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
About
Resources for the book "Functional and Concurrent Programming"
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
19 stars
Watchers
3 watching
Forks
3 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
About
Resources for the book "Functional and Concurrent Programming"
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
19 stars
Watchers
3 watching
Forks
3 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
About
Resources for the book "Functional and Concurrent Programming"
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
19 stars
Watchers
3 watching
Forks
3 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
About
Resources for the book "Functional and Concurrent Programming"
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
19 stars
Watchers
3 watching
Forks
3 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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FCP Code Resources
This repository contains the source code used in the book Functional and Concurrent Programming: Core Concepts and Features, published by Addison-Wesley Professional.
It is laid out as follows:
  • Scala contains all the Scala code used in the book.
Illustrations are organized by chapter and section.
Code snippets that are not standalone classes or functions are implemented as demos.
Demos sometimes rely on arguments for data that is not mentioned in the book.
Data that the book references but does not provide explicitly are implemented in terms of mock objects, often using unrealistic code.
Some unit tests are written using Scalatest.
Note that mock objects and unit tests tend to use dirty, uncommented code that is fairly unreadable.
You are advised to stay away from them.
  • Java contains almost all the Java code used in the book (see MoreJava for exceptions).
This code is used in a joint sbt project with Scala code and depends on mock objects written in Scala.
  • MoreJava contains additional Java code that is not part of the sbt project:
    • Code from Chapter 14 that uses Java records.
Due to a bug, Java records are not currently supported in Scala 3 (scala/scala3#14846).
    • Code from the appendix that uses features only available as a preview in Java 19.
  • Kotlin contains all the Kotlin code.
It is setup as a gradle project, independent from the main sbt project.
  • Python contains (very little) Python code, with no particular setup.
  • JavaScript contains (very little) JavaScript code, with no particular setup.
  • Bash contains (very little) Bash script code, with no particular setup.
The Scala and Java source repositories are setup as a single sbt project, which should make it easy to load and compile the code using sbt or any IDE that is sbt aware, like JetBrains' IntelliJ.
The project specifies the following dependencies:
  • tiny-scala-utils: This is my own library, used mostly to implement tests and mock objects, though it also occasionally appear in the main code (e.g., to display time and thread information in demos).
  • scala-parallel-collections: A semi-standard Scala library that implements collections with parallel processing (see section 21.4).
  • dotty-cps-async: An experimental "async/await" implementation in Scala (see section 27.4).
  • akka-actor-typed: The Akka actors framework (see section 27.5).
  • slf4j-simple: The logging framework used by Akka.
  • reactor-core: The Reactor project, a popular Java implementation of reactive streams (see section 27.6).
The last four dependencies are used only in Chapter 27.
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