Merge two or more JavaScript objects
Learn how to combine two or more objects into a single object in JavaScript.
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 · Generate all consecutive element subarrays from a JavaScript array
Create an array of
n-tuples of consecutive elements from a given array. -
JavaScript · Cartesian product of two JavaScript arrays
Create a new array out of the two supplied by creating each possible pair from the arrays.
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JavaScript · Convert a tilde path to an absolute path in Node.js
Ever wanted to convert a tilde path to an absolute path? Here's how you can do it in JavaScript.
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JavaScript · Convert a JSON object with circular references to a JavaScript string
Circular JSON objects can't be serialized using
JSON.stringify(), but you can use this trick to handle them. -
JavaScript · Check if a JavaScript string is a valid JSON
Use a simple JavaScript trick to validate a serialized JSON object.
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HTML · Open all links in an HTML document in a new tab
Using an HTML element, you can easily make all links in your document open in a new tab. Learn how with this quick tip.
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JavaScript · Sampling, shuffling and weighted selection in JavaScript arrays
Learn how to shuffle, sample and perform weighted selection on JavaScript arrays.
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JavaScript · Generate a random alphanumeric JavaScript string
Use JavaScript to generate a random alphanumeric string of a specified length.
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JavaScript · Strip HTML tags using JavaScript
Use a regular expression to remove HTML/XML tags from a string.
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JavaScript · Generate a JavaScript array of random integers in a given range
Combining
Math.random()and a few simple math operations, you can generate an array of random integers in a specified range. -
JavaScript · Colorize text in the Node.js terminal
Use special Unicode characters to print text in color in the console.
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JavaScript · Generate a random boolean value in JavaScript
A quick, one-liner to generate a random boolean value in JavaScript.
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JavaScript · Check if a JavaScript date is inside business hours
Leverage the
Dateobject to check if a given date is inside business hours. -
JavaScript · Convert an integer to a roman numeral in JavaScript
Roman numerals are often used for stylistic reasons, but converting an integer to a roman numeral can be a bit tricky.
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JavaScript · Generate a random number or integer in a range with JavaScript
Enhance JavaScript's
Math.random()to generate a random number or integer in a specified range. -
JavaScript · Calculate the powerset of a JavaScript array
Generate the powerset of a given array of numbers or other primitive values.
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JavaScript · Find all indexes of a substring in a JavaScript string
Create a generator function that finds all the indexes of a substring in a given string.
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JavaScript · Calculate the byte size of a JavaScript string
Figure out the exact number of bytes in a JavaScript string, including Unicode characters.
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JavaScript · Create a directory if it doesn't exist using Node.js
Learn how to create a directory using Node.js, if it doesn't exist.
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JavaScript · Convert an HSL color string to a JavaScript array or object
Easily convert an
hsl()color string to an array of values or an object with the values of each color. -
JavaScript · Convert an RGB color string to a JavaScript array or object
Easily convert an
rgb()color string to an array of values or an object with the values of each color. -
JavaScript · How can I convert between hexadecimal, RGB, HSL and HSB color formats in JavaScript?
Learn how to easily convert between the various color formats, using JavaScript and a few simple formulas.
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JavaScript · Check if two JavaScript arrays have same contents
Learn how to compare the contents of two arrays to see if they contain the same elements regardless of order.