Utility library for doing arithmetic operation on of 12-hour and 24-hour value and conversion among these formats
Internationalized calendar, date, and time manipulation utilities
TypeScript definitions for date-arithmetic
Utility for converting textual time periods to time units
jpegtran imagemin plugin
BigInt-backed decimal arithmetic for ECMA-402 polyfills
The RAW rational numbers library
An arbitrary length integer library for Javascript
An implementation of an algebraically closed interval system of the extended real number set
Fast robust predicates for computational geometry
Pure double-double precision functions *with strict error bounds*.
Fast, accurate & comprehensive text measurement & layout
TypeScript definitions for react-big-calendar
Interprets/evaluates mathematical expressions using interval arithmetic
SaxonJS XSLT 3.0 processor: a conformant high-performance implementation of XSLT 3.0 for Node.js
Type Level Arithmetic
Parse relative datetime tokens into date objects
Human-friendly process signals
Some common functions for modular arithmetic using native JS implementation of BigInt
Arbitrary precision modular arithmetic, cryptographically secure random numbers and strong probable prime generation/testing. It works in modern browsers, Angular, React, Node.js, etc. since it uses the native JS implementation of BigInt
fast string hashing function
SaxonJS XSLT 3.0 processor: command line interface to SaxonJS
Read/write IEEE754 floating point numbers from/to a Buffer or array-like object
Forbid arithmetic and suggest float-safe alternatives.
Use modular arithmetic and residue classes to calculate schedule availability for dates and times.
A standalone Ruby gem providing secp256k1 elliptic curve primitives via a native C extension. Implements field arithmetic, scalar operations, Jacobian point arithmetic, and constant-time Montgomery ladder scalar multiplication — all without any dependency on libsecp256k1. Suitable for any Ruby project requiring secp256k1 operations.
Optimize is an ahead-of-time YARV bytecode optimizer for CRuby. It decodes iseq binaries into an in-memory IR, runs a configurable pipeline of passes (constant folding, inlining, dead-stash elimination, arithmetic reassociation, and others) under a narrow contract that the program's hot path respects, and re-emits an optimized iseq. Intended as a demo and an experiment, not a production compiler.
# Excel to Code [](https://travis-ci.org/tamc/excel_to_code) excel_to_c - roughly translate some Excel files into C. excel_to_ruby - roughly translate some Excel files into Ruby. This allows spreadsheets to be: 1. Embedded in other programs, such as web servers, or optimisers 2. Without depending on any Microsoft code For example, running [these commands](examples/simple/compile.sh) turns [this spreadsheet](examples/simple/simple.xlsx) into [this Ruby code](examples/simple/ruby/simple.rb) or [this C code](examples/simple/c/simple.c). # Install Requires Ruby. Install by: gem install excel_to_code # Run To just have a go: excel_to_c <excel_file_name> This will produce a file called excelspreadsheet.c For a more complex spreadsheet: excel_to_c --compile --run-tests --settable <name of input worksheet> --prune-except <name of output worksheet> <excel file name> See the full list of options: excel_to_c --help # Gotchas, limitations and bugs 0. No custom functions, no macros for generating results 1. Results are cached. So you must call reset(), then set values, then read values. 2. It must be possible to replace INDIRECT and OFFSET formula with standard references at compile time (e.g., INDIRECT("A"&"1") is fine, INDIRECT(userInput&"3") is not. 3. Doesn't implement all functions. [See which functions are implemented](docs/Which_functions_are_implemented.md). 4. Doesn't implement references that involve range unions and lists (but does implement standard ranges) 5. Sometimes gives cells as being empty, when excel would give the cell as having a numeric value of zero 6. The generated C version does not multithread and will give bad results if you try. 7. The generated code uses floating point, rather than fully precise arithmetic, so results can differ slightly. 8. The generated code uses the sprintf approach to rounding (even-odd) rather than excel's 0.5 rounds away from zero. 9. Ranges like this: Sheet1!A10:Sheet1!B20 and 3D ranges don't work. Report bugs: <https://github.com/tamc/excel_to_code/issues> # Changelog See [Changes](CHANGES.md). # License See [License](LICENSE.md) # Hacking Source code: <https://github.com/tamc/excel_to_code> Documentation: * [Installing from source](docs/installing_from_source.md) * [Structure of this project](docs/structure_of_this_project.md) * [How does the calculation work](docs/how_does_the_calculation_work.md) * [How to fix parsing errors](docs/How_to_fix_parsing_errors.md) * [How to implement a new Excel function](docs/How_to_add_a_missing_function.md) Some notes on how Excel works under the hood: * [The Excel file structure](docs/implementation/excel_file_structure.md) * [Relationships](docs/implementation/relationships.md) * [Workbooks](docs/implementation/workbook.md) * [Worksheets](docs/implementation/worksheets.md) * [Cells](docs/implementation/cell.md) * [Tables](docs/implementation/tables.md) * [Shared Strings](docs/implementation/shared_strings.md) * [Array formulae](docs/implementation/array_formulae.md)
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