Matching all the file extensions

Question

I have a vector of file extensions like (.txt,.TXT,.csv,.xls), i tried "\\.(TXT|txt|csv|xls)$" according to this which return TRUE if any of the extensions are present, however i am interested to return a TRUE if all the extensions are present in the vector otherwise FALSE. Thanks

i tried all but it returns TRUE always if any of the extension is present. — Hashim
– Hashim, Commented Jun 12, 2015 at 17:02

akrun · Accepted Answer · 2015-06-12 17:03:30Z

4

Try

 v1 <- c('a1.txt', 'a2.TXT', 'a3.csv', 'a22.txt', 'a13.TXT', 'a23.txt') ext <- c('txt', 'TXT', 'csv', 'xls') all(ext %in% sub('.*\\.', '', v1) ) #[1] FALSE

answered Jun 12, 2015 at 17:03

akrun

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16 Comments

Hashim Over a year ago

Still 4 mins to go :):)

Hashim Over a year ago

If i need to check if txt orTXT and csv and xls, how can i do that

akrun Over a year ago

@Hashim Isn't that the condition in the question or do you need any in place of all?

akrun Over a year ago

@Hashim Based on the example showed, what do you want to return

Hashim Over a year ago

i mean can i do ignore.case here with all

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