了解Rlang中的数据掩盖
阅读Rland文档时，我仍然很难理解： 转发模式，名称模式，桥梁模式，
例如，很难判断哪些以下是正确的。
vars <- c("cyl", "am")
for (var in vars) print(dplyr::summarise(mtcars, mean = mean(.data[[var]])))
for (var in vars) print(dplyr::summarise(mtcars, mean = mean({{var}})))
for (var in vars) print(dplyr::summarise(mtcars, mean = mean(!!var)))
有什么建议吗？
When reading rland document, it is still a bit of difficult for me to understand:
forwarding patterns, name patterns, bridge patterns
For example, it is difficult to judge which of following is correct.
vars <- c("cyl", "am")
for (var in vars) print(dplyr::summarise(mtcars, mean = mean(.data[[var]])))
for (var in vars) print(dplyr::summarise(mtcars, mean = mean({{var}})))
for (var in vars) print(dplyr::summarise(mtcars, mean = mean(!!var)))
Any suggestions?
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