javascript / intermediate
Snippet
Efficient Transformation with Array.flatMap()
flatMap() combines map() and flat() into one operation. It applies a function to each element and then flattens the result by one level, which is more performant than chain calling both methods.
snippet.js
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const tags = ['js,ts', 'node', 'web,css'];const list = tags.flatMap(tag => tag.split(','));console.log(list); // ['js', 'ts', 'node', 'web', 'css']
Breakdown
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tags.flatMap(tag => tag.split(','))
Splits strings into arrays and immediately flattens them into a single list.