json in array -> overlap problem

[pistacchio]

hi to all!

i have the following code (i stripped down the code to a short
example, but still it does reproduce the problem):

var objs = new Array();
obj = {
parameter : " "
}

objs[0] = obj;
objs[0].parameter = "apple";

objs[1] = obj;
objs[1].parameter = "banana";

alert(objs[0].parameter);

i create a json object (obj) and insert into 2 items of a previously
created array (objs[0] and objs[1]). inspecting the array, i expect
objs[0].parameter to be "apple", not "banana", which is what i keen on
getting.
any idea?
tia, gustavo

[d d]

Re: json in array -> overlap problem

pistacchio wrote:

i create a json object (obj) and insert into 2 items of a previously
created array (objs[0] and objs[1]). inspecting the array, i expect
objs[0].parameter to be "apple", not "banana", which is what i keen on
getting.

objs[0] and objs[1] are both pointers to obj. You're not creating new
instances of obj, you're creating new references to the obj object.

Define obj like this:

obj=function(){ this.parameter= "";}

and in your array, do this:

objs[0] = new obj();
objs[0].parameter = "apple";

objs[1] = new obj();
objs[1].parameter = "banana";

~dd

[Douglas Crockford]

Re: json in array -> overlap problem

pistacchio wrote:

hi to all!
>
i have the following code (i stripped down the code to a short
example, but still it does reproduce the problem):
>
var objs = new Array();
obj = {
parameter : " "
}
>
objs[0] = obj;
objs[0].parameter = "apple";
>
objs[1] = obj;
objs[1].parameter = "banana";
>
alert(objs[0].parameter);
>
i create a json object (obj) and insert into 2 items of a previously
created array (objs[0] and objs[1]). inspecting the array, i expect
objs[0].parameter to be "apple", not "banana", which is what i keen on
getting.
any idea?

var objs = [
{parameter: 'apple'},
{parameter: 'banana'}
];

[pistacchio]

Re: json in array -> overlap problem

d d ha scritto:

pistacchio wrote:

>i create a json object (obj) and insert into 2 items of a previously
>created array (objs[0] and objs[1]). inspecting the array, i expect
>objs[0].parameter to be "apple", not "banana", which is what i keen on
>getting.

>
objs[0] and objs[1] are both pointers to obj. You're not creating new
instances of obj, you're creating new references to the obj object.
>
Define obj like this:
>
obj=function(){ this.parameter= "";}
>
and in your array, do this:
>
objs[0] = new obj();
objs[0].parameter = "apple";
>
objs[1] = new obj();
objs[1].parameter = "banana";
>
~dd

hmmm.. so a js array can store 'objectified functions' but not json objects?

[-Lost]

Re: json in array -> overlap problem

pistacchio wrote:

hmmm.. so a js array can store 'objectified functions' but not json
objects?

A JavaScript array can hold anything. Boolean values, Objects,
Functions, numeric and string primitives, et cetera.

I don't believe there is a limit to what an array can hold, but I could
be wrong.

--
-Lost
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