Lead Data Scientist Question:

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Explain me nchar() in R string manipulation?

Lead Data Scientist Interview Question
Lead Data Scientist Interview Question

Answer:

To find out if elements of a character vector are non-empty strings or not then nzchar is the fastest way.

Keywords
character

Usage
nchar(x, type = “chars”, allowNA = FALSE, keepNA = NA)
nzchar(x, keepNA = FALSE)

Arguments

a. x
Basically, a character vector or a vector will be restricted to a character vector. Giving a factor is an error.

b. type
character string: partial matching to one of c(“bytes”, “chars”, “width”).

c. allowNA
Should NA will return for invalid multibyte strings or “bytes”-encoded strings

d. keepNA
The default for nchar(), NA, means to use keepNA = TRUE unless type is “width”. Used to be hardcoded to FALSE in R versions ≤ 3.2.0.

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