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<p>readr got a new parsing engine in version 2.0.0 (released July 2021). In this so-called second edition, readr calls <code>vroom::vroom()</code>, by default. The vroom package and, therefore, the second edition of readr supports a very natural expression of “use all the data to guess”: namely <code>guess_max = Inf</code>.</p>
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