Is there a Best Practice for using Streambuilders in Flutter? [closed] - dart

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I've been reading up on the BloC pattern and there are some really amazing post out there that go into concise and very clear detail on how to use it:
Thomas Burkhart
Didier Boelens
Filip Hracek
Brian Egan
The only problem I've found, is that all the examples I've seen have been fairly simple apps, and I wanted to know if you are building a complex app that has several pages/ screen, how many StreamBuilders are appropriate to have? Granted it doesn't seem like there is an alternative to rebuild a widget using the Bloc pattern beside FutureBuilder, but I assume that there is a cost to have so many streams that are active.

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I am going to do a sentiment analysis research on facebook comments.any idea how can I coolect facebook comments for my research? [closed]

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I am doing sentimental analysis research for my final year research for facebook comments. But I don't know how can I collect facebook comment's data.
Facebook Graph API get all comments
This might be a useful starting point, as someone with a similar project goal.
I'd probably go with a programming language you're comfortable with, searh for a Facebook API software wrapper (Python) or package (R Studio), and read up on what the functions do.

Should MVVM be used on iOS? [closed]

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I decided to test out the MVVM structure in a MapKit/CoreLocation project of mine with Swift.
Even though I was really hopeful at the beginning about the improved structure, it ended up being more problematic than providing help. Since iOS doesn't have UIBinding, I found myself writing more code and hence the code was becoming harder to track.
Did you tried MVVM on iOS? Did it help? What's your experience like?

Node.js vs Ruby on Rails [closed]

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Which one is more futureproof at this point?
Which one is better for creating simple web apps in smallest time?
This also might be a question of JS vs Ruby, what do you think of this?
What are the pros and cons of each?
I suggest you do more google on this topic because it is a very general topic. However these articles offer some comprehensive comparisons:
http://ilikekillnerds.com/2014/07/should-i-use-ruby-on-rails-or-node-js-for-my-next-projectstartup/
http://fabianosoriani.wordpress.com/2011/09/11/when-to-ruby-on-rails-when-to-node-js/

Image/Text Recognition [closed]

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I saw that this company Mitek made an app that could read receipts through the iPhone's camera and record the information from them. (http://www.miteksystems.com/OOMPH_MobileReceipt.asp). My assumption would be that they run the images through some kind of image/text recognition software. Any ideas what what they might be using? If theres an API that can interpret text from pictures that would be great to.
cheers,
Mike
They are probably using some type of OCR software. It is hard to tell exactly which.
You can look at ocropus, for example

What tasks are F# most suitable for? [closed]

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I've read a lot about F# and seen sample code of some of the nice features, like piping.
For a random business application, what modules would be best suitable for being programmed in F#, or would benefit the most in readability/clearness?
There are many questions like this already. See for example:
https://stackoverflow.com/questions/328329/why-should-i-use-f
https://stackoverflow.com/questions/47315/f-real-world-apps
https://stackoverflow.com/questions/179332/anyone-actually-using-f-in-production
https://stackoverflow.com/questions/39492/where-can-f-actually-save-time-and-money
(Marked this as community wiki, so that others can add other relevant links)

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