You want to return a function result in your JavaScript function
Solution
Use the function with parentheses e.g.
return s.toUpperCase();
Remark
The notation without parentheses
return s.toUpperCase;
is syntactically correct but returns the "toUpperCase" string function and not its result. In most cases this is not what you intend. It is possible (but rarely makes sense) to use the returned function in subsequent JavaScript calls; see the examples 3 and 4 below.
Example 1
CallJS
x =
toUpper "abcde"
Message
"&V[x]"
// JavaScript upper case function
function toUpper(s)
{
return s.toUpperCase();
};
Example 2
CallJS
x =
toUpper "abcde"
Message
"&V[x]"
// JavaScript upper case function
function toUpper(s) { return s.toUpperCase; };
Example 3
CallJS
mytoupper =
toUpper "xyz"
CallJS x
=
mycall "&V[mytoupper]" "abcde"
Message
"&V[x]"
// JavaScript upper case function
function toUpper(s)
{
return s.toUpperCase;
};
function
mycall(m,s){
return m.call(s);
};
Example 4
CallJS
mytoupper =
toUpper
CallJS x
=
mycall "&V[mytoupper]" "abcde"
Message
"&V[x]"
// JavaScript upper case function
function toUpper()
{
return String.prototype.toUpperCase;
};
function
mycall(m,s){
return m.call(s);
};
Components
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