Check If a Data Stream Is Possibly in ASCII — stri_enc_isascii • stringi

The function checks whether all bytes in a string are <= 127.

Usage

stri_enc_isascii(str)

Arguments

str: character vector, a raw vector, or a list of raw vectors

Value

Returns a logical vector. The i-th element indicates whether the i-th string corresponds to a valid ASCII byte sequence.

Details

This function is independent of the way R marks encodings in character strings (see Encoding and stringi-encoding).

See also

The official online manual of stringi at https://stringi.gagolewski.com/

Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, doi:10.18637/jss.v103.i02

Other encoding_detection: about_encoding, stri_enc_detect(), stri_enc_detect2(), stri_enc_isutf16be(), stri_enc_isutf8()

Author

Marek Gagolewski and other contributors

Examples

stri_enc_isascii(letters[1:3])
#> [1] TRUE TRUE TRUE
stri_enc_isascii('\u0105\u0104')
#> [1] FALSE