grep-on-any-cell-in-a-data

d=data.frame(V1=c("xxx","yyy","zzz"), V2=c(NA,"ewruinwe",NA))
d

##    V1       V2
## 1 xxx     <NA>
## 2 yyy ewruinwe
## 3 zzz     <NA>

apply(d, c(1,2), function(x) grepl("ruin", x))

##         V1    V2
## [1,] FALSE FALSE
## [2,] FALSE  TRUE
## [3,] FALSE FALSE

any(apply(d, 2, function(x) grepl("ruin", x)))

## [1] TRUE

#ref https://stackoverflow.com/questions/8999653/grep-on-any-cell-in-a-data-frame

grep-on-any-cell-in-a-data_frame.R