Nothing
## ---- echo=FALSE, warning=FALSE, cache=FALSE, results='hide', message=FALSE----
library(magrittr)
# library(sticky)
## ---- echo=FALSE, warning=FALSE, message=FALSE--------------------------------
library(sticky)
## ---- results='hide'----------------------------------------------------------
x <- 1:5
attr(x, 'foo') <- 'bar'
attr(x[1:3],'foo') # NULL -- attribute was lost by the subset
## ---- results='hide'----------------------------------------------------------
x <- sticky(x)
attr(x[1:3],'foo') # 'bar' -- attribute preserved during subset
## ---- results='hide'----------------------------------------------------------
df <- data.frame(
sticky = sticky( structure(1:5, foo="bar") ),
nonstick = structure( letters[1:5], foo="bar" )
)
attr( df[2:3,"nonstick"], 'foo' ) # NULL
attr( df[2:3,"sticky"], 'foo' ) # bar
## ---- results='hide'----------------------------------------------------------
df <- sticky_all(df)
attr( df[2:3,"nonstick"], 'foo' ) # Now 'baz'
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