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CornerCases.Rmd
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CornerCases.Rmd
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---
title: "Corner Cases"
author: "John Mount"
date: "`r Sys.Date()`"
output: rmarkdown::html_vignette
vignette: >
%\VignetteIndexEntry{Corner Cases}
%\VignetteEngine{knitr::rmarkdown}
%\VignetteEncoding{UTF-8}
---
`wrapr::let()` is designed to get several important corner cases correct:
including substitutions that are disjoint from the expression and symbol swaps.
```{r exdisj}
library("wrapr")
X <- 1
Y <- 2
let(
c(),
debugPrint = TRUE,
X + Y
)
let(
c(),
debugPrint = TRUE,
subsMethod = 'langsubs',
X + Y
)
let(
c(),
debugPrint = TRUE,
subsMethod = 'stringsubs',
X + Y
)
let(
c(),
debugPrint = TRUE,
subsMethod = 'subsubs',
X + Y
)
```
```{r exswap}
library("wrapr")
X <- 1
Y <- 2
let(
c(X='Y', Y='X'),
debugPrint = TRUE,
X + Y
)
let(
c(X='Y', Y='X'),
debugPrint = TRUE,
subsMethod = 'langsubs',
X + Y
)
let(
c(X='Y', Y='X'),
debugPrint = TRUE,
subsMethod = 'stringsubs',
X + Y
)
let(
c(X='Y', Y='X'),
debugPrint = TRUE,
subsMethod = 'subsubs',
X + Y
)
```