BranchesTags

Repository files navigation

Calvin's "Playground" Project

CILicenseCoverage Status

This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.

Contributors

Dependencies

Dependencies are listed in the pom.xml file. See dependencies tag.

License

Copyleft aka open but please leave my copyright comments alone

How to install

Requirement: Java 8, Lombok, JUnit 4, slf4j

  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok

Enjoy!

Contribute

It's easy to find a mistake in the repository. They are literally everywhere!

When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:

  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!

Note: Always write your commit messages in the present tense. Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.

About

Algorithm Playground for Java related work

Topics

algorithmsdata-structuresjavaprogramming

Resources

Readme
Activity

Stars

4 stars

Watchers

1 watching

Forks

0 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, '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
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
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
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
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
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
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
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
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); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Calvin's "Playground" Project
CILicenseCoverage Status
This is where I play and learn different kind of algorithms, data structures, concepts, techniques, etc. Anything related to Programming. Most of the problems included are basics for now which I personally find important. I plan to continue contributing more problems here for the future.
Contributors
Dependencies
Dependencies are listed in the pom.xml file. See dependencies tag.
License
Copyleft aka open but please leave my copyright comments alone
How to install
Requirement: Java 8, Lombok, JUnit 4, slf4j
  1. Clone and Load as Maven project with pom.xml selected.
  2. Need to enable annotiations / necessary plugins for Lombok
Enjoy!
Contribute
It's easy to find a mistake in the repository. They are literally everywhere!
When you spot a mistake needs correction, please do not hesitate to create a Pull Request as instructed below:
  1. Create a local clone of the repository / pull to the latest changes.
  2. Create a new branch to work on (git checkout -b)! Branch from master (no develop here :p).
  3. Introduce a new algorithm OR correction to the existing one.
  4. Please write/adapt unit tests and run them!
  5. Add or change the documentation as needed.
  6. Push your branch. Open a pull request targeting the project's master branch!
Note: Always write your commit messages in the present tense.
Your commit message should describe what the commit, when applied, does to the code - not what you did to the code.
About
Algorithm Playground for Java related work
Topics
algorithmsdata-structuresjavaprogramming
Resources
Readme
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages