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Insert, Remove
Syntax
Insert(V:LIST,N:INT,E:OBJECT):NULL
Remove(V:LIST,N:INT):NULL
where V is a variable containing a list.
Summary
insert or remove an object in a list
Description
The first function inserts E into the list L as the N-th component.
example
L := ["a","b","d","e"];
Insert(L,3,"c");
L;
["a", "b", "c", "d", "e"]
-------------------------------
The second function removes the N-th component from L. (The function
WithoutNth
returns the list obtained by removing the N-th component
of L without affecting L, itself.)
example
Use R ::= Q[x,y,z];
L := Indets();
L;
[x, y, z]
-------------------------------
Remove(L,2);
L;
[x, z]
-------------------------------
See Also