Of source you can do that, but that would mean that this code can't be used in
IE8 and below. Some people still care about those browsers :)
On Mar 11, 2013, at 23:00 , Rick Waldron wrote:
> I haven't seen anything so far that couldn't be done with the object meta
> API...
>
> var fname = "John", lname = "Doe";
>
> Object.defineProperty(this, "full", {
> get: function() {
> return fname + " " + lname;
> }
> });
>
> full;
> // "John Doe"
>
>
> On Monday, March 11, 2013, Tristan Slominski wrote:
> Thanks Andrey, those are great pointers, I'll take a look.
>
> On Monday, March 11, 2013 2:08:09 PM UTC-5, Андрей Листочкин wrote:
> Another similar project: http://component.io/weepy/attr
>
> It's a component, not the npm package but it's pretty easy to add it to your
> project since it's only one file.
>
> The API is similar to Knockout js
> http://knockoutjs.com/documentation/computedObservables.html
>
> var firstName = attr('John'), lastName = attr('Dow'), fullName =
> attr(function () {
> return firstName() + ' ' + lastName()
> })
>
> lastName('Resig')
>
> fullName() // === 'John Resig'
>
> It does the same thing as your package but does automatic dependency
> resolution and tracking. Take a look!
>
> BTW that's one of the reasons why I prefer something like Knockout or Angular
> to Ember.
>
> Andrey
>
> On Mar 11, 2013, at 02:22 , Tristan Slominski wrote:
>
>> I saw a presentation, recently, on Ember.js computed properties. This got me
>> curious about reactive programming.
>>
>> computed-value is a tiny library that allows developers to very simply
>> specify dependencies between properties and recalculate them every time one
>> of those dependent properties changes. This isn't a new idea, but I've
>> attempted to make it as small and as powerful as possible. (And in the
>> spirit of "stream all the things", I attempted to use the new "streams2"
>> under the hood, so it requires node >= 0.9.12).
>>
>> If you're interested in reactive programming I would love some feedback on
>> the API. It's still brand new, and experimental.
>>
>> Here's a computed full name example:
>>
>> var cv = require('computed-value');
>>
>> var first = cv('John');
>> var last = cv('Smith');
>> var full = cv(first, last, function(first, last) {
>> return first + ' ' + last;
>> });
>>
>> console.log(full.value);
>>
>> first.write('Bob');
>> console.log(full.value);
>>
>> full.on('update', function(updatedValue) {
>> console.log('update:', updatedValue);
>> });
>>
>> last.write('Johnson');
>>
>> You can find the project here:
>> https://github.com/tristanls/node-computed-value
>>
>> Cheers,
>>
>> Tristan
>>
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>
>
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