Prepend

Prepend[expr,elem]
gives expr with elem prepended.

Prepend[elem]
represents an operator form of Prepend that can be applied to an expression.

DetailsDetails

  • Prepend works on SparseArray objects, returning ordinary lists if necessary.
  • Prepend can be used on Association objects. Single new elements are specified in the form . New values replace older ones if their keys are the same.
  • Multiple elements to prepend to an association can be specified in the form .
  • Prepend[elem][expr] is equivalent to Prepend[expr,elem].
Introduced in 1988
(1.0)
| Updated in 2014
(10.0)