expr
Expression language and expression evaluation for Go [Moved to: https://github.com/expr-lang/expr] (by antonmedv)
gval
Expression evaluation in golang (by PaesslerAG)
| expr | gval | |
|---|---|---|
| 24 | 2 | |
| 4,802 | 793 | |
| - | 1.3% | |
| 0.0 | 3.7 | |
| over 1 year ago | 7 months ago | |
| Go | Go | |
| MIT License | BSD 3-clause "New" or "Revised" 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.
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 2023-05-17.
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Solving the Expression Problem in Go
Not diminishing the article at all, there's massive value I've gained from leveraging this runtime solution in multiple projects: https://github.com/antonmedv/expr
The language is easy enough for people to pick-up.
- Expr Release v1.15
- Expr v1.14 release: Go expression language
- Expr – expression language with type checker
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FireScroll - The config database to deploy everywhere (now with conditional statements!)
Uses the [expr](https://github.com/antonmedv/expr) language to achieve this and I've been super happy with the results.
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Library to analyze an arbitrary JSON string
I have been using expr (https://github.com/antonmedv/expr) to do something like this for a while. no complains so far.
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[gcalc] A simple calculater in golang
If you wanted it to not require putting in the operation first and just accept string equations (without using something like https://github.com/antonmedv/expr) you could parse, tokenize and then process the input.
- Go Expression Language
- Polymode: Multiple Major Modes and How to Use SQL and Python in One Buffer
- Expr (Go expression language) releases v1.11
gval
Posts with mentions or reviews of gval.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-06-09.
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Interpreters built in Go
For practical start, see this: https://www.youtube.com/watch?v=JiViND-bpmw It explain one particular type of parser type that is quite easy to grasp and fun to write. Also look on some libraries that deliver "expression executors" - these are in fact small interpreted languages and can give you plenty of examples. Classic one (though currently unmaintaines I think) is: https://github.com/PaesslerAG/gval but there are plenty more, just google for them. On my last words, this is very enjoyable part of programming but it requires much learning so be patient and have fun!
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My first open-source project looking for feedback
There is a nice lib that let you write much more compact expressions https://github.com/PaesslerAG/gval I'm using this lib for evaluating expressions in a small BPMN engine. At least your solution is missing a context, functions and data to work on. But trying stuff out is propably the best way to learm Go!
What are some alternatives?
When comparing expr and gval you can also consider the following projects:
cel-go - Fast, portable, non-Turing complete expression evaluation with gradual typing (Go)
tengo - A fast script language for Go
goja - ECMAScript/JavaScript engine in pure Go
mosalat - a rule-engine with custom dsl for golang
govaluate - Arbitrary expression evaluation for golang