str_arithmetic | R Documentation |
String arithmetic operators.
The x %s+% y
operator is exported from 'stringi',
and concatenates character vectors x
and y
.
The x %s-% p
operator removes character/pattern
defined in p
from x
.
The x %s*% n
operator is exported from 'stringi',
and duplicates each string in x
n
times,
and concatenates the results.
The x %s/% p
operator counts how often character/pattern
defined in p
occurs in each element of x
.
The x %s//% brk
operator counts how often the text boundary specified in list brk
occurs in each element of x
.
The e1 %s$% e2
operator is exported from 'stringi',
and provides access to stri_sprintf in the form of an infix operator.
The x %ss% p
operator splits the strings in x
by a delimiter character/pattern defined in p
,
and removes p
in the process.
For cutting strings by text boundaries, or around a location,
see strcut_brk and strcut_loc.
x %s-% p
x %s/% p
x %s//% brk
x %ss% p
The %s+%
, %s-%
, and %s*%
operators
return a character vector of the same length as x
.
The %s/%
and %s//%
both return an integer vector of the same length as x
.
The %s$%
operator returns a character vector.
The %ss%
operator returns a list of the split strings - or,
if simplify = TRUE
/ simplify = NA
,
returns a matrix of the split strings.
tinycodet_strings
x <- c(paste0(letters[1:13], collapse = ""),
paste0(letters[14:26], collapse = ""))
print(x)
y <- c("a", "b")
p <- rep("a|e|i|o|u", 2) # same as p <- list(regex = rep("a|e|i|o|u", 2))
n <- c(3, 2)
x %s+% y # = paste0(x,y)
x %s-% p # remove all vowels from x
x %s*% n
x %s/% p # count how often vowels appear in each string of vector x
x %ss% p # split x around vowels, removing the vowels in the process
x %ss% s_regex(p, simplify = NA) # same as above, but in matrix form
test <- c(
paste0("The\u00a0above-mentioned features are very useful. ",
"Spam, spam, eggs, bacon, and spam. 123 456 789"),
"good morning, good evening, and good night"
)
test %s//% list(type = "character")
x <- c(paste0(letters[1:13], collapse = ""),
paste0(letters[14:26], collapse = ""))
print(x)
y <- "a"
# pattern that ignores case:
p <- list(regex = rep("A|E|I|O|U", 2), case_insensitive = TRUE)
n <- c(2, 3)
x %s+% y # = paste0(x,y)
x %s-% p # remove all vowels from x
x %s*% n
x %s/% p # count how often vowels appears in each string of vector x.
x <- c(paste(letters, collapse = ", "), paste(LETTERS, collapse = ", "))
print(x)
x %ss% ", "
t(x %ss% s_fixed(", ", simplify = NA))
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