how to display the values of a map variable in javascript

Question

I have a javasrcript variable

var hash = {
    '.bmp' : 1,
    '.gif' : 1,
    '.jpeg' : 1,
    '.jpg' : 1,
    '.png' : 1,
    '.tif' : 1,
    '.tiff' : 1,    
  };

I want to display the values (.bmp, .gif, .jpeg, .jpg, .png, .tif, .tiff) of this "hash" object in my alert message. How can I do this? Please help.

David Hedlund · Accepted Answer · 2010-04-30 07:26:48Z

2

var text ='',
for(key in hash)
    text += (key + ' = ' + hash[key] + '\n');

alert(text);

Although I must say what you're dealing with here is really an object that has properties that start with a dot, which seems like terribly bad practice to me. If they were without the dot, you could've done hash.bmp for instance, instead of hash['.bmp'].

answered Apr 30, 2010 at 7:26

David Hedlund

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Amarghosh · Accepted Answer · 2010-04-30 07:27:02Z

0

alert(hash['.bmp']); //alerts 1

You might want to remove the trailing comma after the last item.

answered Apr 30, 2010 at 7:27

Amarghosh

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