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]

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]

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'}
];