GitHub - RushuiGuan/expression: c# expression parser and evaluator

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v3.0.13
- New operation GetJsonArrayItem
  - Provided a json array and an index, the operation will return the array item at the index.
  - example 1: GetJsonArrayItem('[1, 2, 3]', 1)
    - return value 2
  - example 2: GetJsonArrayItem('[1, 2, 3]', 3)
    - throw an ArgumentException since array index is out of bound
v3.0.12
- New operation RegexCapture
  - RegexCapture can be used to extract part of a text string using regex pattern and capature groups.
  - Operands
    1. text to be parsed
    2. regex pattern
    3. group capture index (optional with the default of 0)
  - example 1: RegexCapture('abc123', '[a-z]+(\d+)', 1)
    - returns 123
  - example 2: RegexCapture('abc123', '[a-z]+(\d+)')
    - return abc123 because capture index is not specified and 0 is used by default
  - example 3: RegexCapture('abc123', '[a-z]+(\d+)', 3)
    - throw an ArgumentException since capture index is out of bound
3.0.11
- New operation
  - Floor - The Floor operation calls C# Math.Floor. It returns the largest integral value from the input double number.
  - Round - The Round operation calls C# Math.Round and use AwayFromZero rounding
    - Operands
      1. double value to be rounded
      2. number of fractional digits in the return value
  - UnixTimestamp2DateTime - Converts a Unix time expressed as the number of seconds that have elapsed since 1970-01-01T00:00:00Z to a DateTime value in UTC
    - Operands
      1. integer: number of seconds that have elapsed since 1970-01-01T00:00:00Z

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c# expression parser and evaluator

rushuiguan.github.io/expression

parser csharp expression eval

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