# NOT RUN {
x=c('a12','a','b')
patterns=c('b','1')
grepl_or(x,patterns)
x=c('a12','a1','b')
patterns=c('a','1')
grepl_and(x,patterns)
x=c('a12','a','b')
patterns=c('a','1')
grepl_not_and(x,patterns)
x=c('a12','a','b')
patterns=c('a','1')
grepl_not_or(x,patterns)
# }
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