TakeDrop

TakeDrop[list,n]

gives the pair {list1,list2}, where list1 contains the first n elements of list and list2 contains the rest.

TakeDrop[list,seq]

gives the pair {Take[list,seq],Drop[list,seq]}.

Details

  • TakeDrop uses the standard sequence specification:
  • Allall elements
    Noneno elements
    nelements 1 through n
    UpTo[n]elements 1 up to at most n, as available
    -nlast n elements
    {n}element n only
    {m,n}elements m through n inclusive
    {m,n,s}elements m through n in steps of s
  • TakeDrop can be used on an object with any head, not necessarily List.
  • Applying TakeDrop to a SparseArray object normally yields a pair of SparseArray objects.
  • Applying TakeDrop to an Association object yields a pair of Association objects containing elements from the specified positions.

Examples

open allclose all

Basic Examples  (2)

Scope  (5)

TakeDrop uses the standard sequence specification:

Take up to 8 elements in the first list, or as many as are available:

Use expressions with arbitrary heads:

Use TakeDrop with sparse arrays:

Use TakeDrop with associations:

Applications  (1)

Break a list into sublists of given lengths:

Properties & Relations  (1)

TakeDrop is equivalent to a combination of Take and Drop:

Introduced in 2015
 (10.2)
 |
Updated in 2015
 (10.3)