File Paths in R Programming Language
Here’s the translation of the Go code to R, formatted in Markdown suitable for Hugo:
In R, we don’t have a direct equivalent to the filepath
package, but we can use various functions from base R and the tools
package to handle file paths. Let’s explore how to work with file paths in R.
# We'll use the tools package for some file path operations
library(tools)
# Join paths
p <- file.path("dir1", "dir2", "filename")
print(paste("p:", p))
# Join paths and normalize
print(file.path("dir1//", "filename"))
print(normalizePath(file.path("dir1/../dir1", "filename"), mustWork = FALSE))
# Get directory and base name
print(paste("Dir(p):", dirname(p)))
print(paste("Base(p):", basename(p)))
# Check if path is absolute
print(file_path_as_absolute("dir/file"))
print(file_path_as_absolute("/dir/file"))
filename <- "config.json"
# Get file extension
ext <- file_ext(filename)
print(ext)
# Remove file extension
print(file_path_sans_ext(filename))
# Find relative path
rel <- relative_path("a/b", "a/b/t/file")
print(rel)
rel <- relative_path("a/b", "a/c/t/file")
print(rel)
Let’s break down the R equivalent operations:
We use
file.path()
to join path components in a platform-independent way.R doesn’t have a direct equivalent to
filepath.Join()
that also normalizes paths, but we can usenormalizePath()
to achieve a similar effect.dirname()
andbasename()
are used to split a path into directory and file components.R doesn’t have a direct
IsAbs()
function, butfile_path_as_absolute()
from thetools
package can be used to check if a path is absolute.file_ext()
from thetools
package is used to get the file extension.file_path_sans_ext()
from thetools
package removes the file extension.relative_path()
from thetools
package finds a relative path between a base and a target.
When you run this R script, you’ll get output similar to:
[1] "p: dir1/dir2/filename"
[1] "dir1/filename"
[1] "/path/to/your/working/directory/dir1/filename"
[1] "Dir(p): dir1/dir2"
[1] "Base(p): filename"
[1] "/path/to/your/working/directory/dir/file"
[1] "/dir/file"
[1] "json"
[1] "config"
[1] "t/file"
[1] "../../c/t/file"
Note that the exact output might vary depending on your working directory and operating system. R handles file paths in a cross-platform manner, but the display of absolute paths will depend on your system.