compound variables

• :setvar a “!!b” # B is not referenced, 2!’s fold to 1

• :setvar b “123”

• :showvar a, b A=!b B=123

• :echo b is !b, a is !a b is 123, a is 123

• :setvar a123 “xyz”

• :echo Compound var "a!!b": !"a!b” Compound var "a!b": xyz

• :setvar J 2 :setvar VAL2 “bar” :setvar VAL3 “foo”

  • :calc VAL!J bar
  • :calc VAL![J] bar
  • :calc VAL![decimal(J)] bar
  • :calc VAL![setvar(J,J+1)] foo

Previous slide

Next slide

Back to first slide

View graphic version

• The CI allows two or more variable names to be concatenated to form a new variable name, and to reference the value of this name-derived variable.

• A common application of compound names is variable arrays, discussed next.

• The value of a variable can reference another variable, e.g..  :setvar color “red” :setvar bg “!!color” :showvar bg BG = !color :echo 123 !color 456 123 red 456