array_notation.cfm

<cfscript>
  myVar = "test";
  myStruct = {test:"foo"; test2:"bar"}
  echo(myStruct[myVar]); //outputs "foo"
  echo(myStruct["#test2#"]; //outputs "bar"
</cfscript>

dynamic_variable.cfm

<cfscript>
  myVar = "test";
  "#myVar#" = "foo";
  echo(test); //outputs foo
</cfscript>

evaluate.cfm

<cfscript>
  myVar = "test";
  evaluate("#myVar# = 'foo'");
  echo(test); //outputs foo
</cfscript>

evaluate_assign.cfm

<cfscript>
  myVar = "foo";
  test = evaluate("uCase(myVar)");
  echo(test); //outputs FOO
</cfscript>