Inline String Interpolation with Environment Variables

The strs_f function allows for inline variable interpolation in strings, similar to Python's f-strings.

Usage

strs_f(string)

Arguments

string

A character vector containing the string with placeholders in curly braces {}. If the vector contains more than one string, they are concatenated before interpolation.

Value

A character vector with the placeholders replaced by the evaluated expressions.

Details

Under the hood, this function uses the glue::glue_data() function to perform the interpolation. However, this function doesn't let you change the evaluation context or perform any string trimming. If any interpolated expression is NA, it will be NA in the output. If any interpolated expression is NULL, it will be NULL in the output.

Examples

name <- "Alice"
age <- 30
strs_f("My name is {name} and I am {age} years old.")
#> [1] "My name is Alice and I am 30 years old."
# Output: "My name is Alice and I am 30 years old."
age <- NULL
strs_f("My name is {name} and I am {age} years old.")
#> [1] "My name is Alice and I am NULL years old."
# Output: "My name is Alice and I am NULL years old."