indexOf: Find occurences of string within another string

In TalhoukLab/biostatUtil: Utility Functions Used in Biostatistics Projects

Find occurences of string within another string

Description

Returns a vector of the indices where a string occurs in another string

Usage

indexOf(a, b, ignore.case = FALSE)

Arguments

a	string to be checked against
b	string to check
ignore.case	logical; if TRUE, case is ignored when performing the check

Details

If b is longer than a, indexOf returns NA, since it is not possible for a longer string to occur in a shorter string.

Value

Indices where b occurs in a. Returns NA if there are no occurences.

Author(s)

Samuel Leung

See Also

stringr::str_locate_all()

Examples

indexOf("derek", "e")
indexOf("Animals", "a")
indexOf("Animals", "A")
indexOf("Animals", "a", ignore.case = TRUE)

TalhoukLab/biostatUtil documentation built on April 14, 2025, 4:15 a.m.