Gets a single element or a slice of elements from a vector
Gets a single character or slice of characters from a scalar text value
For a vector defined as <v:vector {A}, {B}, {C}, {D}, {E}, {F}, {G}>:
<v.@ 1>{A}
<v.@ 2,5>{B}, {C}, {D}, {E}
<v.@ -3,-1>{D}, {E}, {F}
<v.@ 2,-1,2>{B}, {D}, {F}
For a scalar defined as <s:scalar {Hello World!}>: