eval() how else

[J. J. Cale]

given that I have a js file included which is written programatically and I
can't change it. I would like to know how to do the following using
something other than the deprecated eval().
whats in the js file
var numArrays=somet hing;
var data0 = new Array();
data0.name="nam e";
data0.data="som e data";
var data1 = new Array();
data1.name="ano ther name";
data1.data="som e more data";
etc ....
function getData(arrayNa me) {
for ( var i=0;i<numArrays :i++) {
var el=eval('data'+ i);
if (arrayName = = el.name) doSomething(el. data);
}
}

[Evertjan.]

J. J. Cale wrote on 31 aug 2004 in comp.lang.javas cript:

var el=eval('data'+ i);

el = window['data'+i]

[if a browser is used as javascript base]

--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress,
but let us keep the discussions in the newsgroup)

[Mick White]

J. J. Cale wrote:

given that I have a js file included which is written programatically and I
can't change it. I would like to know how to do the following using
something other than the deprecated eval().
whats in the js file
var numArrays=somet hing;
var data0 = new Array();
data0.name="nam e";
data0.data="som e data";
var data1 = new Array();
data1.name="ano ther name";
data1.data="som e more data";
etc ....
function getData(arrayNa me) {
for ( var i=0;i<numArrays :i++) {
var el=eval('data'+ i); var el= window['data'+i]
// Mick
if (arrayName = = el.name) doSomething(el. data);
}
}

[Lee]

J. J. Cale said:

given that I have a js file included which is written programatically and I
can't change it. I would like to know how to do the following using
something other than the deprecated eval().
whats in the js file
var numArrays=somet hing;
var data0 = new Array();
data0.name="na me";
data0.data="so me data";
var data1 = new Array();
data1.name="an other name";
data1.data="so me more data";
etc ....
function getData(arrayNa me) {
for ( var i=0;i<numArrays :i++) {
var el=eval('data'+ i);
if (arrayName = = el.name) doSomething(el. data);
}
}

I don't know that eval() is deprecated.
It's just usually not the best way to do something.

Assuming that this is in a web page, you can replace:
eval('data'+i)
with:
window['data'+i]

The fact that the variables are defined in a .js file
isn't really significant. The contents of that file
are evaluated in the context of the current window.

[Thomas 'PointedEars' Lahn]

J. J. Cale wrote:

given that I have a js file included which is written programatically and
I can't change it.
Why?
I would like to know how to do the following using something other than
the deprecated eval().
whats in the js file
var numArrays=somet hing;
var data0 = new Array();
data0.name="nam e";
data0.data="som e data";
var data1 = new Array();
data1.name="ano ther name";
data1.data="som e more data";
etc ....
function getData(arrayNa me) {
for ( var i=0;i<numArrays :i++) {
var el=eval('data'+ i);
if (arrayName = = el.name) doSomething(el. data);
}
}

var _global = this;

function getData(arrayNa me)
{
for (var i = 0; i < numArrays; i++)
{
var el = _global['data' + i];
if (arrayName == el.name)
{
doSomething(el. data);
}
}
}

But:
Why do you not use an Array object in the first place?
Why do data0, data1 aso. refer to an Array object anyway?

var data = [
{name: "name",
data: "some data"},
{name: "another name",
data: "some more data"}];

Or define and use a prototype:

function Data(sName, d)
{
this.name = sName;
this.data = d;
}

var data = [
new Data("name", "some data"),
new Data("another name", "some more data")];
PointedEars

P.S.
Please use empty lines in your postings for
paragraphs to make them easier legible.
--
Our only hope lies in the mind of Kiki