Extract string before “|” [duplicate]

by

We can use sub

sub("\\|.*", "", str1)
#[1] "ABC"

Or with strsplit

strsplit(str1, "[|]")[[1]][1]
#[1] "ABC"

Update

If we use the data from @hrbrmstr

sub("\\|.*", "", df$V1)
#[1] "ABC"   "ABCD"  "ABCDE" "DEF"   "GHI"   "BCDE"

These are all base R methods. No external packages used.

data

str1 <- "ABC|DEF|GHI ABCD|EFG|HIJK ABCDE|FGHI|JKL DEF|GHIJ|KLM GHI|JKLM|NO|PQRS BCDE|FGHI|JKL"

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