Remove entire list elements which contain a certain string

Question

var1 is a list:

var1 <- list(c("tall tree", "fruits", "star"),  
             c("tree tall", "pine tree", "tree pine", "black forest", "water"), 
             c("apple", "orange", "grapes"), 
             c("ancient pine tree", "all trees"))

I need to remove those elements entirely from the list which contains the term "pine".

The desired answer is a list:

[[1]]
[1] "tall tree" "fruits"    "star"    
[[2]]
[1] "apple"  "orange" "grapes"

Thanks

Answer 1

You could try Filter here

Filter(function(x) !any(grepl("pine", x)), var1)
# [[1]]
# [1] "tall tree" "fruits"    "star"     
# 
# [[2]]
# [1] "apple"  "orange" "grapes"

Answer 2

var1[lapply(var1,function(x) length(grep("pine",x,value=FALSE))) == 0]