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by sureglymop1 days ago |
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upvoteby geodel19 hours ago|
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> All the flaws I can think of in Kotlin are due to the Java compatibility.

All the use of Kotlin in industry are due to Java compatibility. Else there would be ~0% marketshare of Kotlin.

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upvoteby loglog16 hours ago|
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Mojo is NOT Python compatible (although they initially wanted it to be). So they got all downsides without the upsides.
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upvoteby fiedzia11 hours ago|
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They claim you can easily mix them so there is some degree of compatibility.
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upvoteby Conscat8 hours ago|
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Every reasonable language has a Python interop story. All it takes is C FFI. But what Mojo promised early on was the eventuality of compiling a large amount of Python code if not entire wheels as Mojo.
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upvoteby melodyogonna4 hours ago|
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I don't recall they promised that. They promised it'll be a superset, but Mojo introduces new keyword. Mojo could support all Python features today exactly as they're supported in Python and you wouldn't still be able to copy Python code into Mojo and compile it
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upvoteby boxed6 hours ago|
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"All downsides"? What do you mean?
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upvoteby jasonjmcghee15 hours ago|
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There is unfortunately likely a lot of truth to this. I like Kotlin, but, anecdotally, I've only ever chosen it due to needing JVM
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upvoteby davidatbu18 hours ago|
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I'm pretty sure that they have decided that backwards-compat is not the best path for Mojo. Matter of fact, the following is the _last_ item on the roadmap on the home page:

> Supporting more of Python's dynamic features like classes, inheritance, and untyped variables to maximize compatibility with Python code.

What's more, note how it says "to maximize compatibility" not "to achieve full compatibility."

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upvoteby pjmlp1 days ago|
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Same story with C and Objective-C, C and C++, JavaScript and TypeScript, Java and Scala, Java and Clojure,.....

Yes the underlying platform they based their compatibility on, is the reason they got some design flaws, some more than other.

However that compatibility is the reason they won wide adoption in first place.

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upvoteby tasuki1 days ago|
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They coulda made it Scala!
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upvoteby boxed6 hours ago|
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> Mojo is cool but I just don't understand the python backwards compat thing. They're holding themselves back with that.

In reality I think they've dropped that pretty hard. Literally you can't even get the length of a string with `len(s)` in the latest release. They also removed negative indexing, which I find baffling and frustrating. The roadmap does say they don't intend to have any "syntax sugar" until later in the implementation, but negative indexing is such a core part of what makes Python so much nicer to work with compared to say C++...

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