Hi,

I hope its useful.

refer link:
http://argutech.blogspot.in/2013/10/create-calculator-application-use.html

and

http://jsfiddle.net/Kumar_Weblogicx/f3LkE/

Thanks to advance!


On Tue, Jan 28, 2014 at 7:49 AM, Robert Schooley
<[email protected]>wrote:

> This post is highly ranked when searching for this, "issue", so I'd like
> to provide a little more detail.
>
> By the reasoning above shouldn't we get a null value in this example:
> http://jsfiddle.net/8MYjx/
>
> We get a value of "", which is not consistent with the other use case
> above.  This is still a source of confusion in 1.2.5.
>
> I would also say that a value="" isn't "no entry", it is a default entry
> that plays well with client side validation.
>
> On Wednesday, February 13, 2013 11:10:49 AM UTC-5, Pete Bacon Darwin wrote:
>>
>> In angular the convention is that an input with no entry has a null
>> model. If  "" is a valid option then why not add it to the list if options
>> provided by ng-option?
>>
>> Pete
>> ...from my mobile.
>> On Feb 13, 2013 1:01 PM, "Dave Merrill" <[email protected]> wrote:
>>
>>> Does this strike anyone else as unexpected behavior, i.e., a bug? The
>>> option value is explicitly empty string, not null.
>>>
>>> Peter, your fix is clever and works, but it's remedial, restoring the
>>> normal behavior of HTML.You could attach that same directive to ngOptions
>>> instead, so it's used always, but it seems to me like this should be fixed
>>> in Angular core.
>>>
>>> Dave Merrill
>>>
>>> On Wednesday, February 13, 2013 5:47:29 AM UTC-5, Peter Bacon Darwin
>>> wrote:
>>>>
>>>> You can "fix" it with a $parser...
>>>>
>>>> http://jsfiddle.net/CB5um/
>>>>
>>>>
>>>> On 13 February 2013 10:27, Henrik Johansson <[email protected]> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I'm wondering if it's possible to have a
>>>>>
>>>>> <select ng-model="query.city" ng-options="..."><option
>>>>> value="">-empty</option></select>
>>>>>
>>>>>
>>>>> That when "-empty" is selected makes query.city be '' (empty string)
>>>>> instead of null. Am I missing something?
>>>>>
>>>>> I've put together a jsfiddle to show what I mean: http://jsfiddle.net/
>>>>> Qcyj7/7/
>>>>>
>>>>> Thanks!
>>>>> Henrik
>>>>>
>>>>>
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