pack -- pack elements of a list into several shorter lists

Synopsis

• Usage:

  pack(A, n)

  pack(n, A)

• Inputs:
  • A, a basic list,
  • n, an integer, how many elements of A to put in each new list
• Outputs:
  • L, a list, a list of lists, with the elements of A taken n at a time.

Description

i1 : pack(a..l, 3)

o1 = {{a, b, c}, {d, e, f}, {g, h, i}, {j, k, l}}

o1 : List

i2 : pack(3, a..l)

o2 = {{a, b, c}, {d, e, f}, {g, h, i}, {j, k, l}}

o2 : List

i3 : pack(a..m, 3)

o3 = {{a, b, c}, {d, e, f}, {g, h, i}, {j, k, l}, {m}}

o3 : List

i4 : pack(2, mingle(a..m, 0..12))

o4 = {{a, 0}, {b, 1}, {c, 2}, {d, 3}, {e, 4}, {f, 5}, {g, 6}, {h, 7}, {i, 8},
     ------------------------------------------------------------------------
     {j, 9}, {k, 10}, {l, 11}, {m, 12}}

o4 : List

See also

• mingle -- mingle elements of several lists
• sort -- sort a list or columns of a matrix
• sublists -- process interspersed subsequences of a visible list
• take -- Take some elements from a list or sequence.
• lists and sequences -- a detailed overview of lists and sequences in Macaulay2