Implement the SDBM hash function in JavaScript
SDBM is a simple, non-cryptographic hash function that can hash strings into whole numbers. Here's a JavaScript implementation.
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 · Use JavaScript to listen and handle scroll stop events
Use some clever JavaScript tricks to listen for and handle scroll stop events in the browser.
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CSS · Define a system font stack in CSS
Learn how to leverage the native fonts of the operating system to get close to a native app feel.
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JavaScript · Word wrap a JavaScrip string
Wrap a string to a given number of characters using a string break character in JavaScript.
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JavaScript · Create a JavaScript promise that resolves after a given amount of time
Learn how to create a promise that resolves after a given amount of time in JavaScript.
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JavaScript · Apply a mapping function to each character in a JavaScript string
Learn how to replicate the behavior of
Array.prototype.map()for strings. -
JavaScript · Find the number of days in a month using JavaScript
Calculate the number of days in a month for a given year using JavaScript.
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JavaScript · Get the scroll position of the current page using JavaScript
Calculate the coordinates of the current scroll position in the browser window using JavaScript.
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JavaScript · Get the width of the scrollbar using JavaScript
Easily and reliably calculate the width of the browser's vertical scrollbar with JavaScript.
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JavaScript · Find the prime factors of a number in JavaScript
Find the prime factors of a number using trial division in JavaScript.
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JavaScript · Implementing the Luhn Algorithm in JavaScript
Implement the Luhn Algorithm, used to validate a variety of identification numbers.
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JavaScript · Get, set or add styles to an HTML element with JavaScript
Learn how to retrieve and manipulate the styles of an HTML element easily and efficiently with JavaScript.
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JavaScript · JavaScript function methods - call(), apply() and bind()
Learn everything you need to know about JavaScript's
call(),apply()andbind()in this short guide. -
JavaScript · Transform the keys of a JavaScript object
Learn how to perform various transformations on the keys of a JavaScript object.
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JavaScript · Escape or unescape HTML using JavaScript
Learn how to convert text into HTML-safe strings and vice versa using JavaScript.
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JavaScript · Get the first or last date of a month using JavaScript
Use the
Dateobject and some clever tricks to get the first or last date of a month in JavaScript. -
JavaScript · Calculate the nth root of a number in JavaScript
Use
Math.pow()to calculate the nth root of a given number in JavaScript. -
JavaScript · Calculate the ranking of a JavaScript array
Calculate the ranking of an array based on a comparator function in JavaScript.
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JavaScript · Arithmetic and geometric progression in JavaScript
Create arrays of numbers in arithmetic and geometric progression.
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JavaScript · Check if all values of a JavaScript array are equal
Use the
Array.prototype.every()method to check if all values of an array are equal in JavaScript. -
JavaScript · Check if a numeric array is sorted in JavaScript
Efficiently check if a numeric array is sorted in ascending or descending order in JavaScript.
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JavaScript · Formatting numeric values in JavaScript
Learn common number formatting operations, such as rounding, padding, optional decimal marks, currency, seconds, bytes, and more.
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JavaScript · Clamp or map a number to a range in JavaScript
Clamping and mapping a number to a range are two common and easily confused operations. Learn how to perform each in JavaScript.
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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.