CODEWITHSUNDEEP
javascriptarraysloopsfor-loop
Billy
Billy

Reputation: 125

How to get array identifier in javascript?

how can I get the indentifier of an associative array (not Array object) in a for loop?

like so:

var i = 0;
for(i=0;i<=myArray;i++)
{
   if(myArray.ident == 'title') alert('The title is ' + myArray['title']);
}

Upvotes: 1

Views: 4649

Answers (5)

Er Sharad Soni
Er Sharad Soni

Reputation: 310

var i;
var mycars = new Array();
mycars[0] = "Saab";
mycars[1] = "Volvo";
mycars[2] = "BMW";

for (i = 0; i < mycars.length; i++) {
  document.write(mycars[i] + "<br>");
}

Upvotes: 2

FK82
FK82

Reputation: 5075

As @Nick Craver posted, loop through your data object (associative array), preferrably using the compact syntax, and check whether the property matches your string:

var myData = { /* properties: values */ } ;
var string = /* string to match */ ;

    for(var n in myData) {

            if(n == string) {
                // do something
            }

    }

Upvotes: 0

Alex K.
Alex K.

Reputation: 175866

Depends somewhat on how you construct myArray, in general:

var myArray = {
   title: "foo",
   bleep: "bloop"
}

for (var k in myArray) {
   if (k == "title") 
      alert('The title is ' + myArray[k]);
}

Upvotes: 0

Nick Craver
Nick Craver

Reputation: 630549

You can do it using a different for() loop, like this:

var myArray = { title: "my title", description: "my description" };
var i = 0;
for(var i in myArray) {
   //if(i == 'title') is the check here...
   alert('The '+ i + ' is ' + myArray[i]);
}​

Inside the loop, i is your identifier, e.g. title and description. You can play with this example here

Upvotes: 7

Gabriele Petrioli
Gabriele Petrioli

Reputation: 196132

ident is the identifier in your case and 'title' is its value ..

Please show us the actual array ..

normally to loop through an associative array you would do it like this..

for (key in myArray)
  {
    if (key == 'title')
      alert('The title is ' + myArray[key]);
  }

Upvotes: 0

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