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Lionel Henry

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Air - A blazingly fast R code formatterposit::conf(2025)2025-09-16
Air is an R code formatter implemented in Rust that formats big files nearly instantly — about 20 ms for a 1k‑line file and ~200 ms to format all of dplyr’s…
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Introducing Positron, a new data science IDEposit::conf(2024)2024-08-12
Positron is a newly public early beta IDE (six weeks) that runs R and Python via language packs and aims to be extensible to other languages; it ships a new…
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Programming in the TidyversesatRdays Paris 20192019-02-23
Explains how tidyverse packages like dplyr and ggplot2 use data masking and why that breaks simple reuse: a loop passing column names yields a mean of a string…
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Working with names and expressions in your tidy eval coderstudio::conf 20192019-01-15
Shows how passing ... into dplyr lets a wrapper accept either column selections or column actions and demonstrates two concrete wrappers: a selection-based…
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Interactivity and Programming in the Tidyverserstudio::conf 20192019-01-15
Explains concrete tidyverse tools to eliminate data masking surprises and make reusable functions: use .data and .env pronouns to disambiguate column vs…
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