v0.3.0

As always, you can try out the latest development release online.

"Days of Abandon"

Major Changes

• Vector indexed assignment (x[1:3] <- 10) is now supported! What's more,
  it avoids intermediate replications of the vector by keeping track of the
  indexing operation as a "view" of the vector.

  x <- 1:10
  x[2:8][2:5][[2]] <- 1000
  x
  # [1]    1    2    3 1000    5    6    7    8    9   10

• Mutating assignment implemented for Lists, including by named index.

  x <- list(a = 1, b = 2, c = 3, d = 4, e = 5)
  x[2:3][[1]] <- 200
  x[1:4][c("d", "c")] <- 1000
  x
  # list(a = 1, b = 200, c = 1000, d = 1000, e = 5)

Internals

• "altreps" are now supported internally, though currently only a "Subset"
  (used for indexed assignment) is implemented.

• Lists were reworked to use a HashMap of named values, allowing for
  more immediate access to named values without repeated traversals of a
  vector of pairs.