xstart or end with string (entries of)
suffixrespectively, where strings are recycled to common lengths.
startsWith() is equivalent to but much faster than
substring(x, 1, nchar(prefix)) == prefixor also
prefixis not to contain special regular expression characters.
startsWith(x, prefix) endsWith(x, suffix)
characterstring whose starts are considered.
charactervector (often of length one).
logicalvector, of common length of
suffix), i.e., of the longer of the two lengths unless one of them is zero when the result is also of zero length. A shorter input is recycled to the output length.
suffixis of length one, and is further optimized in a UTF-8 or 8-byte locale if that is an ASCII string.
substring; the partial string matching functions
pmatchsolve a different task.
startsWith(search(), "package:") # typically at least two FALSE, nowadays often three x1 <- c("Foobar", "bla bla", "something", "another", "blu", "brown", "blau blüht der Enzian")# non-ASCII x2 <- cbind( startsWith(x1, "b"), startsWith(x1, "bl"), startsWith(x1, "bla"), endsWith(x1, "n"), endsWith(x1, "an")) rownames(x2) <- x1; colnames(x2) <- c("b", "b1", "bla", "n", "an") x2
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