expr VS tengo

Compare expr vs tengo and see what are their differences.

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expr tengo
4 5
5,443 3,421
4.7% -
9.4 5.8
7 days ago 28 days ago
Go Go
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

expr

Posts with mentions or reviews of expr. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-12-25.

tengo

Posts with mentions or reviews of tengo. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-11-24.
  • Making Games in Go for Absolute Beginners
    17 projects | news.ycombinator.com | 24 Nov 2023
    > I am the developer of Astral Divide, which is entirely written in Go: https://store.steampowered.com/app/2597060/Astral_Divide/

    Your game looks great, congrats on your progress! I especially enjoyed how the zoom works when you're leaving/arrive planets, and the unique propulsion system (also, the anchor made me giggle!).

    > lack of data structure packages

    I tend to not need many, so I'd be curious if you can recall any structure in particular which you couldn't find? No biggie if not.

    > package structure not suited for games

    I'm not a game dev, but I've seen some larger games such as https://github.com/divVerent/aaaaxy/tree/main/internal (if you haven't played it beforeā€”do it!) which seem to be able to place everything into separate packages without issue, so perhaps there's something to gleam from their design?

    > maps are random when iterated

    Hash map iteration shouldn't be sorted in _any_ language (here's Rust, for example https://play.rust-lang.org/?version=stable&mode=debug&editio... (Python makes it _appear_ as if dicts are sorted hash maps, but that's only because it doesn't only use a hash table, but a vector as well (same as you'd have to do in Go))), otherwise it would cause both portability and security (https://github.com/golang/go/issues/2630) issues. You can use a b-tree (which was probably the data structure you wanted there) if you aren't willing to sort it yourself.

    > modding options

    If you don't care about unloading https://github.com/pkujhd/goloader

    Go actually has one of the best WASM runtimes https://github.com/tetratelabs/wazero

    It also has a bunch of libraries for embedding scripting languages https://awesome-go.com/embeddable-scripting-languages, with Tengo _probably_ being quickest https://github.com/d5/tengo

    I'd _highly_ recommend Ebitengine in the future, as not only have there been multiple brilliant games using it, but it also has Switch/Android/iOS support, and you can find help with any issue whatsoever in their Discord. People have built 3D games with it, and Hajime is an absolute beast of a developer.

    17 projects | news.ycombinator.com | 24 Nov 2023
    > It also has a bunch of libraries for embedding scripting languages https://awesome-go.com/embeddable-scripting-languages, with Tengo _probably_ being the quickest https://github.com/d5/tengo

    Yes, I noticed those packages recently. The problem is that there is little data about how reliable and maintainable goloader is going to be on the long term.

    As I care about performance and security, I don't want a scripting language, but WASM seems to be a very promising possibility. I have made benchmarks with 2~3 WASM engines in Go, and so far I am not completely convinced about the quality and performance of the available APIs. Also, when compiling Golang to WASM, the native compiler is still abysmally bad and does not have full support for imports, so Tinygo is a must-have.

    Anyway, modding is still a long term idea at this point, so hopefully the ecosystem will get more mature within a couple of years.

  • Looking for programming languages created with Go
    23 projects | /r/golang | 6 Nov 2022
    - https://github.com/d5/tengo
  • Change go code behaviour at runtime
    10 projects | /r/golang | 10 Oct 2022
    There are totally different things like https://github.com/d5/tengo but I don't know much about the docs, communities, or viability of them. Some like this one look very active and healthy. It might be worth considering.
  • Asking for advice to get deeper understanding of golang internals.
    5 projects | /r/golang | 30 Mar 2022
    I started doing this a few years ago when I wanted to add programmability to another system I was working on, and didn't want Lua or anything else like that. I set it aside when other priorities arose, and didn't return to it when I saw that others had already done the same thing (yaegi, tengo).

What are some alternatives?

When comparing expr and tengo you can also consider the following projects:

otto - A JavaScript interpreter in Go (golang)

goja - ECMAScript/JavaScript engine in pure Go

gopher-lua - GopherLua: VM and compiler for Lua in Go

expr - Expression language and expression evaluation for Go [Moved to: https://github.com/expr-lang/expr]

go-php - PHP bindings for the Go programming language (Golang)

go-lua - A Lua VM in Go

The uGO Language - Script Language for Go

cel-go - Fast, portable, non-Turing complete expression evaluation with gradual typing (Go)

Gentee script programming language - Gentee - script programming language for automation. It uses VM and compiler written in Go (Golang).

go-python - naive go bindings to the CPython2 C-API

gval - Expression evaluation in golang

binder - High level go to Lua binder. Write less, do more.