Or reduce?
Need to modify the number of items during a map in #JavaScript?
Use flatMap, which was introduced in ES10! 
#dev #development #codepic.twitter.com/ISlYFD9TRJ
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Wait I'm blatantly wrong
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ES10? I thought we were still on ES6
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For anyone who might be curious:https://twitter.com/devcastcode/status/1196482943868448768 …
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Only if you want to add more, though? This is neat!
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Adding and removing! To remove an item, return an empty array in the callback.
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Does a generic flattern exist though?
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Yes, flat(), also ES10! Great overview from
@MozDevNet here:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat …
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Is it still a map operation though?
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It's essentially a more efficient way to do a map() followed by a depth 1 flat()! Flat also being an ES10 addition:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat …
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