R help - Jul 2010 - StartsWith over vector of Strings?

Given vectors of strings of arbitrary length

content <- c("abc", "def")
searchset <- c("a", "abc", "abcdef",
"d", "def", "defghi")

Is it possible to determine the content String set that matches the
searchset in the sense of 'startswith' ? This would be a vector of all
strings in content that start with the string of any of the strings in
the searchset. In the little example here, this would be:

result <- c("abc", "abc", "def",
"def")

Best,
Ralf

content[na.omit(pmatch(searchset, content,,TRUE))]

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Ralf B
> Sent: Tuesday, July 13, 2010 5:47 AM
> To: r-help at r-project.org
> Subject: [R] StartsWith over vector of Strings?
> 
> Given vectors of strings of arbitrary length
> 
> content <- c("abc", "def")
> searchset <- c("a", "abc", "abcdef",
"d", "def", "defghi")
> 
> Is it possible to determine the content String set that matches the
> searchset in the sense of 'startswith' ? This would be a vector of
all
> strings in content that start with the string of any of the strings in
> the searchset. In the little example here, this would be:
> 
> result <- c("abc", "abc", "def",
"def")
> 
> Best,
> Ralf
> 
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