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A case for `prefer-flat-map` #311

tinovyatkin posted onGitHub

I think it will be way greater rule if it will be able to identify legacy (before .flat got supported) code and suggest to refactor to flatMap. I believe one of the most common scenario was use of [].concat with array spread:

[].concat(...someArray.map(fn))
// is the same
someArray.flatMap(fn)

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prefer-flat-map: Add warning for common concat pattern #323submitted bymrhen(201)

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mrhen was rewarded by sindresorhus for sindresorhus/eslint-plugin-unicorn# 311

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A case for `prefer-flat-map` #311

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