Create a math expression tokenizer in JavaScript
Learn how to tokenize math expressions, using a simple JavaScript algorithm, forming the basis for more complex interpreters and compilers.
Code Articles
30 seconds of code contains a curated collection of code articles covering a wide range of development needs. The collection spans many topics, ranging from simple coding problems to theoretical concepts and development techniques.
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JavaScript · -
JavaScript · Group data using the K-means clustering algorithm in JavaScript
Implement the K-means clustering algorithm in JavaScript to group data into clusters.
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JavaScript · How can I convert the data from an HTML form to a JavaScript object?
Convert the data from an HTML form into a JavaScript object or serialize it into a query string.
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JavaScript · How can I clone an array in JavaScript?
Pick up a few new tricks which you can use to clone arrays in JavaScript.
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React · React useClickOutside and useClickInside hooks
Learn how to effectively handle the click event outside or inside a component using custom hooks.
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React · Listening for events with React hooks
Learn how to create custom hooks to listen for events in React.
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JavaScript · How can I implement a singleton in JavaScript?
Learn how to implement the singleton design pattern in JavaScript, using the Proxy object.
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JavaScript · How do I convert an iterable to an array in JavaScript?
Learn how to use the JavaScript ES6 spread syntax to converting iterables to arrays and level up your code today.
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JavaScript · How do I use JavaScript to get the base URL or the URL parameters?
Master URL handling by learning how to get the base URL and the URL parameters as an object in JavaScript.
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JavaScript · Flatten or unflatten a JavaScript object
Learn how to manipulate JavaScript objects by flattening or unflattening them.
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JavaScript · A complete guide to JavaScript typechecking
Learn all you need to know to effectively and efficiently typecheck values in JavaScript.
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JavaScript · Asynchronous array loops in JavaScript
Asynchronously looping over arrays in JavaScript comes with a few caveats you should watch out for.
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CSS · Image overlay on hover
Learn how to display an image overlay effect on hover using CSS.
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React · File drag and drop area
Create a file drag and drop React component for a single file.
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JavaScript · Convert between a query string and an object in JavaScript
Convert between a query string and its object representation in JavaScript.
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JavaScript · Implementing the Porter stemming algorithm in JavaScript
Learn how to implement the Porter stemming algorithm in JavaScript, a simple algorithm for stripping English words of common suffixes.
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JavaScript · How can I parse Reverse Polish Notation in JavaScript?
Parsing Reverse Polish Notation, also known as postfix notation, is a simple algorithm that can be implemented in JavaScript using a stack.
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JavaScript · Merge two or more JavaScript objects
Learn how to combine two or more objects into a single object in JavaScript.
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JavaScript · How can I find the longest common subsequence of two strings in JavaScript?
The longest common subsequence is the longest subsequence common to all given sequences and can be easily found using dynamic programming.
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JavaScript · How can I perform an HTTP request in JavaScript?
Learn how to perform HTTP GET, POST, PUT, and DELETE requests in JavaScript.
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JavaScript · JavaScript Data Structures - Binary Tree
A binary tree is a hierarchical data structure of linked nodes with at most two children each.
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HTML · Use data attributes instead of HTML classes to represent state
Learn how to use data attributes to represent UI state and level up your HTML and CSS game.
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React · React useMutationObserver hook
Use the
MutationObserverAPI to watch for changes made to the DOM tree. -
React · React useFetch hook
Implement
fetch()in a declarative manner using React hooks.