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Comment by realharo | Hacker News Reader

My point is that in environments like old-school Delphi or VB, or even with frameworks like Qt, those things take way more effort and boilerplate code than they should.

For exapmle in Qt you have to either subclass QAbstractListModel or use QStandardItemModel with weird QStandardItem wrappers around your data, then you have QSortFilterProxyModel (https://doc.qt.io/qt-5/qsortfilterproxymodel.html) and all that weirdness. And then for the actual UI of the individual items, you have QAbstractItemDelegate, etc. https://doc.qt.io/qt-5/qabstractitemdelegate.html

I mean, just look at this example: https://doc.qt.io/qt-5/qtwidgets-itemviews-stardelegate-exam...

No way that should take that much code.

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If you say so. I have worked professionally in quite a few UI frameworks and they are pretty much the same.

The web is actually one of the most complex ones out there due to the never ending frameworks and libraries that come into fashion every other year. Old environments had a defined set of things to use and learn and things were stable for many years.

In Qt you can build your UI on the fly with code without using those classes if that is what you are asking.

I doubt I could build something like this

https://codesandbox.io/s/eloquent-spence-d51td?file=/src/App...

in Qt or one of the "old school" desktop tools as quickly as I just did in a few minutes, that loads data from the web (mock) and displays them in this way (and has this level of flexibility for further development). There's just no way.

Hows the code in that link fundamentally different from what you'd write in e.g. Qt's QML?

One difference is that you can just use data directly as it comes from the net (or combine it with any other data in your application).

You don't have to wrap it in models like this https://doc.qt.io/qt-5/qtquick-modelviewsdata-modelview.html and then either recalculate that when the data changes or have a custom model class that does it. Though granted that is still a huge improvement over doing this in regular Qt Widgets (see the star example a few comments above), or one of the "old school" desktop GUI builders. This difference would be felt even more if the items also had some interactivity with state (e.g. expanded/collapsed things in them, lazy loaded extra info etc.)

One consequence of the way rendering works is that I can just use language-native constructs like `if` or the ternary operator to either include or not include the "Top poster" line in the example. Instead of having to do something like this https://stackoverflow.com/questions/27695717/conditionally-i.... Similarly, you can use map/filter on arrays, transform the data more easily before rendering it, etc.

Another difference is that JS/TS is the main language of the entire app, not a separate DSL that you can use for some parts and not for others. You can use async/await, have the entire npm ecosystem available, etc.

Though QML is still hell of a lot better in this regard than old school VB or Delphi used to be.

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