Using a string as a function name

[Euperia]

Hi

I would like to use a string from an array to call a function. For
example, I have a list of functions called A.B,C,D etc and for various
situations I need to call a a different range of functions:

var myFunctions = ["A","C","G","B" ,"E"];

for (i = 0; i < myFunctions.len gth; i++) {
errorcode = myFunctions[i](); // I want to call A(); B() etc
}


Is it possible with Javascript, and if so, how?

Regards
Andrew

[Steve van Dongen]

Re: Using a string as a function name

On 11 Aug 2003 09:29:23 -0700, andrew@euperia. com (Euperia) wrote:
[color=blue]
>Hi
>
>I would like to use a string from an array to call a function. For
>example, I have a list of functions called A.B,C,D etc and for various
>situations I need to call a a different range of functions:
>
>var myFunctions = ["A","C","G","B" ,"E"];[/color]

Change this line to
var myFunctions = [A,C,G,B,E];
so that you have an array of function references instead of an array
of strings.
[color=blue]
>for (i = 0; i < myFunctions.len gth; i++) {
> errorcode = myFunctions[i](); // I want to call A(); B() etc
>}
>
>
>Is it possible with Javascript, and if so, how?[/color]

Regards,
Steve

[Douglas Crockford]

Re: Using a string as a function name

> I would like to use a string from an array to call a function. For[color=blue]
> example, I have a list of functions called A.B,C,D etc and for various
> situations I need to call a a different range of functions:
>
> var myFunctions = ["A","C","G","B" ,"E"];
>
> for (i = 0; i < myFunctions.len gth; i++) {
> errorcode = myFunctions[i](); // I want to call A(); B() etc
> }[/color]

Functions are values. You can use myFunctions to store the functions themselves,
not just their names.

var myFunctions = [A, C, G, B, E];

This assumes that function A et al have been defined.

You could go a step further and define the functions in the array literal.

var myFunctions = [function A() {
...
}, function C() {
...
}, function G() {
...
}, function B() {
...
}, function E() {
...
}];

http://www.crockford.com/

[Vjekoslav Begovic]

Re: Using a string as a function name


"Euperia" <andrew@euperia .com> wrote in message
news:b1790405.0 308110829.1cd50 4@posting.googl e.com...[color=blue]
> Hi
>
> I would like to use a string from an array to call a function. For
> example, I have a list of functions called A.B,C,D etc and for various
> situations I need to call a a different range of functions:
>
> var myFunctions = ["A","C","G","B" ,"E"];
>
> for (i = 0; i < myFunctions.len gth; i++) {
> errorcode = myFunctions[i](); // I want to call A(); B() etc[/color]

for (i = 0; i < myFunctions.len gth; i++) {
errorcode = window[myFunctions[i]]();
}