delete -- delete some elements of a list

Usage:

delete(x, A)
Inputs:
- A, list or sequence
- x, thing
Outputs:
- A2, a new list from A with every occurrence of x removed

Description

i1 : delete(c, {a,b,c,d,e,a,b,c,d,e})

o1 = {a, b, d, e, a, b, d, e}

o1 : List

Equality is determined with ===, which is quick, but not always intuitive. For instance, in the next example, the first item in the list is not removed, because it is an element of QQ and will not match an element of ZZ.

i2 : delete(1, {2/2, 3/2, 4/2})

         3
o2 = {1, -, 2}
         2

o2 : List

To delete items from a list by index, rather than value, see drop.

Ways to use delete:

delete(Thing,BasicList)

For the programmer

The object delete is a method function.

The source of this document is in Macaulay2Doc/functions/delete-doc.m2:37:0.

delete -- delete some elements of a list

Description

See also

Ways to use delete:

For the programmer