CODEWITHSUNDEEP
javascript
draford
draford

Reputation: 241

how to copy array to array

var ce_info=[
{location:"inchannel",name:"Jae Jung",volume:"50",url:"img/jae.jpeg",group:1},
{location:"inchannel",name:"Houston",volume:"50",url:"img/houston.jpeg",group:1},
{location:"inchannel",name:"Jun kuriha..",volume:"50",url:"img/jun.jpeg",group:1},
{location:"inchannel",name:"Andrea Melle",volume:"50",url:"img/andrea.jpeg",group:0},
{location:"inchannel",name:"Tomoaki Ohi..",volume:"50",url:"img/ohira.jpeg",group:0},
{location:"inchannel",name:"Woosuk Cha..",volume:"50",url:"img/woosuk.jpeg",group:0},
{location:"inchannel",name:"Luca Rigaz..",volume:"50",url:"img/luca.jpeg",group:0},
{location:"inchannel",name:"SooIn Nam",volume:"50",url:"img/sooin.jpeg",group:0}
];
var inch_info=[{location:"ichat",name:"",volume:"50",url:""}];

for(i=0;i<ce_info.length;i++)
{   

    if(ce_info[i].location=="inchat")
    {       

        inch_info[inchat_count].name=ce_info[i].name;
        inch_info[inchat_count].url=ce_info[i].url;
        inchat_count++;

    }
}

I am trying to copy ce_info to inch_info. It seems like it does not work.It occurs an error when I try to copy ce_info to inch_info Any thought?

Upvotes: 0

Views: 402

Answers (4)

Rick Hoving
Rick Hoving

Reputation: 3575

You still have a typeO in your code

var inch_info=[{location:"ichat",name:"",volume:"50",url:""}];

shouldnt location be inchat instead of ichat? Because that is what you check for in this line

if(ce_info[i].location=="inchat")

Furthermore in ce_info there is no location named inchat so the result of this piece of code will not be executed. But if there where an element in ce_info that has the location inchat this will be the code you need to add the location and name to the inch_info array.

Change your for loop in this:

for(var eElem in ce_info)
{   
    if(ce_info[eElem].location=="inchannel")
    {
        var temp = {};
        temp.name=ce_info[eElem].name;
        temp.url=ce_info[eElem].url;
        inch_info.push(temp);

    }
}

Upvotes: 1

Zain Shaikh
Zain Shaikh

Reputation: 6043

using jQuery you can achieve it so easily:

See a working demo here

following jQuery code makes sure that you do not have a by reference object of ce_info.

jQuery code:

var inch_info= jQuery.extend(true, {}, ce_info);

alert("inch_info: before changing text: "+inch_info[0].location);

inch_info[0].location = "hello world"

alert("inch_info: after changing text: "+inch_info[0].location);
alert("ce_info: after changing text: "+ce_info[0].location);

Upvotes: 0

Rony SP
Rony SP

Reputation: 2628

Copying a native JS Array is easy. Use the Array.slice() method which creates a copy of part/all of the array.

var foo = ['a','b','c','d','e'];
var bar = foo.slice();

now foo and bar are 5 member arrays of 'a','b','c','d','e'

Upvotes: 4

Fabian
Fabian

Reputation: 179

inchat_count seems to be uninitialized. 

var inch_info=[{location:"icha",name:"",volume:"50",url:""}];
var inchat_count = 0; // You forgot this line!!
for(i=0;i<ce_info.length;i++)
{   

    if(ce_info[i].location=="inchat")
    {       

        inch_info[inchat_count].name=ce_info[i].name;
        inch_info[inchat_count].url=ce_info[i].url;
        inchat_count++;

    }
}

Upvotes: 2

Related Questions