list.first {rlist} | R Documentation |
Find the first element that meets a condition
list.first(.data, cond)
.data |
A |
cond |
a logical lambda expression |
x <- list(p1 = list(type='A',score=list(c1=10,c2=8)),
p2 = list(type='B',score=list(c1=9,c2=9)),
p3 = list(type='B',score=list(c1=9,c2=7)))
list.first(x, score$c1 < 10)
list.first(x, score$c1 < 9 || score$c3 >= 5) # NULL for all results are NA or FALSE