Dear R-Users,
I tried the following 3 Regex expressions in R 4.3:
strsplit("a bc,def, adef ,,gh", " |(?=,)|(?<=,)(?![ ])", perl=T)
# "a" "bc" "," "def" "," "" "adef" "," "," "gh"
strsplit("a bc,def, adef ,,gh", " |(?<! )(?=,)|(?<=,)(?![ ])", perl=T)
# "a" "bc" "," "def" "," "" "adef" "," "," "gh"
strsplit("a bc,def, adef ,,gh", " |(?<! )(?=,)|(?<=,)(?=[^ ])", perl=T)
# "a" "bc" "," "def" "," "" "adef" "," "," "gh"
Is this correct?
I feel that:
- none should return (after "def"): ",", "";
- the first one could also return "", "," (but probably not; not fully
sure about this);
Sincerely,
Leonard
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