Kuba Sekowski

Create an example of using HF in a node server

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### Description - A similar thing might also be helpful for some specific Handsontable use-cases (according to @AMBudnik ) - It could be in a form of tutorial with code...

### Description We should think of a way to feed HF and Microsoft Excel with the same worksheets and measure the build time. ### Links https://kb.handsontable.com/pages/resumedraft.action?draftId=56461842&draftShareId=afd03cbf-f20d-4478-b16a-88cb2fd393c8 (internal resource)

Add unit tests for apostrophe operator

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### Context ### How has this been tested? ### Types of changes - [ ] Bug fix (non-breaking change which fixes an issue) - [ ] New feature or improvement...

### Description There are several issues about it: - API reference for dateFormats and parseDateTime is not clear enough about what is possible - `'.'` is also a valid date...

### Description By starting the cell content with `'` character (apostrophe) our parser treats the rest of it as string. I cannot find any docs that mention this feature. ###...

### Description The automatic tests that we have are of 2 types: e2e tests that uses the public API only and the low-level unit tests for all the "internal" classes....

Memory leaks in unit tests

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### Description When running unit tests we can see that the heap size increases with every spec file. There must be a memory leak somewhere. It might be related to...

Add support for inferring return types of a custom function

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### Description As described in #875 by MartinDawson: > Consider any formula that you do not know the exact return type of or the return type is too large and...

### Description Our guide for built-in functions includes a list of all the functions and very short description of each of them (one sentence and a very basic example). We...

### Description We do not support the *-syntax for `SUMPRODUCT` function, but the same thing can be achieved by `SUM(ARRAYFORMULA(...))`. We should describe it in the docs. ### Links https://github.com/handsontable/hyperformula/discussions/916...