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Design Patterns Ruby implementation

This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features. Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.

How to use

Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book. The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in. Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.

Wiki

All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.

Support

If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)

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My implementation of different Design Patterns on Ruby programming language

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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" + '

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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
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, '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('^' + ".*" + '

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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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('^' + ".*" + '

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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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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Design Patterns Ruby implementation
This repository is my personal attempt to implement all 23 Design Patterns, introduced in the famous book 'Design Patterns: Elements of Reusable Object-Oriented Software' written by, as they called 'Gang Of Four' - Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, using the Ruby programming language features.
Each example is heavily commented and I've tried to come up with the interesting and unique application area for every pattern, so to be interesting for a reader.
How to use
Each pattern implementation is separated on files, where every file is named in a manner the structural elements of pattern are named in the book.
The main file, which experiements with the implementation is called implementation.rb, so to run it, just execute ruby implementation.rb in your terminal inside the pattern directory which you are interested in.
Many implementations are interactive, other just outputs the resulting data, so, please, read the source code before running.
Wiki
All patterns and their implementations are detailed in the Wiki section of this repository, so... please visit, if you're not very familiar with design patterns or just interested in my understanding of them.
Support
If you have any comments, or suggestions, please mail me: cyrilvixp@gmail.com or use the mechanisms of Forks & Pull Requests. Thank you! ;)
About
My implementation of different Design Patterns on Ruby programming language
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages