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Published 9 days ago • Latest: 0.3.2
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A pure Dart implementation of JSONata - JSON query and transformation language for querying and transforming JSON data.

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Changelog #

0.2.0 #

  • Date/time functions:
    • $now([picture [, timezone]]) - Returns current timestamp in ISO 8601 format or formatted with picture string
    • $millis() - Returns current timestamp as milliseconds since Unix epoch
    • $fromMillis(number [, picture [, timezone]]) - Convert milliseconds to formatted string
    • $toMillis(timestamp [, picture]) - Parse timestamp string to milliseconds
    • Full XPath/XQuery picture string support for date/time formatting and parsing
    • All component specifiers: Y, M, D, d, F, W, w, X, x, H, h, P, m, s, f, Z, z
    • Presentation modifiers: numeric, name, ordinal, roman, words
  • Regular expression functions:
    • $match(string, regex [, limit]) - Find regex matches with match objects
    • $replace(string, regex, replacement) - Replace with regex, capture groups, or lambda functions
    • $contains(string, regex) - Test if string matches regex
    • $split(string, regex [, limit]) - Split string by regex pattern
    • Partial application support with ? placeholder
  • Transform operator (~>) - Function chaining with left-associativity
  • Bug fixes:
    • Fixed ~> operator to be left-associative (so a ~> b ~> c = (a ~> b) ~> c)
  • Error handling improvements:
    • D3132: Unknown component specifier in date/time picture
    • D3133: Unsupported name format for component
    • D3136: Underspecified date/time (gaps or unsupported formats)
  • 661 tests passing (607 suite + 54 unit)

0.1.0 #

  • Initial release
  • Core JSONata language features:
    • Path expressions (a.b.c, a[0], a.b[c > 0])
    • Wildcards (*, **)
    • Array/object constructors
    • Arithmetic, comparison, and boolean operators
    • Conditional expressions (a ? b : c)
    • Variable binding ($x := value)
    • Lambda expressions (function($x) { $x * 2 })
    • Object grouping operator (items{category: $sum(price)})
    • Range operator ([1..10])
  • Built-in functions:
    • String: $string, $length, $substring, $uppercase, $lowercase, $trim, $pad, $split, $join, $contains, $replace
    • Numeric: $number, $abs, $floor, $ceil, $round, $power, $sqrt, $random, $sum, $max, $min, $average, $formatNumber, $formatBase, $formatInteger, $parseInteger
    • Array: $count, $append, $sort, $reverse, $shuffle, $distinct, $zip, $flatten
    • Object: $keys, $values, $spread, $merge, $lookup, $each
    • Boolean: $boolean, $not, $exists
    • Type: $type
    • Higher-order: $map, $filter, $reduce, $single
  • Custom function registration
  • Variable binding
  • JSONata-compatible error codes

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A pure Dart implementation of JSONata - JSON query and transformation language for querying and transforming JSON data.

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Topics

#json #query #transformation #data-processing #jsonata

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