R: Remove the number of occurrences of values in one vector from another vector, but not all

Question

Apologies for the confusing title, but I don\'t know how to express my problem otherwise. In R, I have the following problem which I want to solve:

x <- seq(1         


        

Answer 1

Similar to @VincentGuillemot's answer, but in functional programming style. Uses purrr package:

i <- z
map(p, function(x) { i <<- i[-min(which(i == x))]})
i

> i
 [1] 1 1 1 1 1 1 1 0 0 0 0 0 0 0

Answer 2

There might be numerous better ways to do it:

i <- z
for (val in p) {
  if (val %in% i) {
    i <- i[ - which(i==val)[1] ]
  }
}

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Another solution that I like better because it does not require a test (and thanks fo @Franck's suggestion):

for (val in p) 
  i <- i[ - match(val, i, nomatch = integer(0) ) ]