Build a permutation p such that ids1[p] == ids2. See http://www.win-vector.com/blog/2017/09/permutation-theory-in-action/.

match_order(ids1, ids2)

## Arguments

ids1 unique vector of ids. unique vector of ids with sort(ids1)==sort(ids2).

## Value

p integers such that ids1[p] == ids2

## Examples


ids1 <- c(4, 5, 7, 8, 9, 6, 1, 3, 2, 10)
ids2 <- c(3, 6, 4, 8, 5, 7, 1, 9,10, 2)
p <- match_order(ids1, ids2)
ids1[p]#>  [1]  3  6  4  8  5  7  1  9 10  2all.equal(ids1[p], ids2)#> [1] TRUE# note base::match(ids2, ids1) also solves this problem