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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
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rust-decimal
Decimal number implementation written in pure Rust suitable for financial and fixed-precision calculations.
Please don't go on about downvotes—this is in the site guidelines: https://news.ycombinator.com/newsguidelines.html.
If the downvotes were inappropriate, other users will usually correct them (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...), but off-topic, guidelines-breaking complaints like the one you added don't get garbage-collected when that happens, so they linger on, adding noise to the thread.
This is why in "classic" fintech they used so-called "decimal" fixed-point numbers for decades. To not use COBOL as an example let's check something more modern, e.g. Rust[1].
[1] https://github.com/paupino/rust-decimal