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Excerpt

Identifies tokens which look like numbers and flags them with the "NUMBER" flag.


Operates On:  Lexical Items with TOKEN

Info

Currently handles the following situations:

  • Integers:  0, 1, 100
  • Floats:  0.5, 12.2, 3.14159 (.)
  • Negative:  -1003, -12.2
  • Thousands with/without separator: 1000000, 1,000,000 (,)
  • Numbers with scientific notation: 1,1x10^-8, 1.1x10??, 1,1x10^8, -1.1x10??
  • Romans numbers: MMC, XII, IV
  • English ordinals numbers: 1st, 12th, 23rd
  • Exponents: 4?, 4^9, 4^-9, 4??
Note

Does NOT currently recognize:

  • Computer literals:  0xBEA1, 07832
  • European numbers with commas and periods swapped
  • Positive:  +102.3


Include Page
Generic Configuration Parameters
Generic Configuration Parameters

Configuration Parameters

    • scientificNotation (boolean, optional)
      • Enable recognition of scientific notation.
    • ordinals (boolean, optional)
      • Enable ordinals numbers recognition.
    • romans (boolean, optional)
      • Enable romans number recognition.
    • ordinalsLang (string, optional)
      • Choose ordinals language. Currently supported english: "en"


Code Block
languagejs
themeEclipse
titleExample Configuration
{
    "type": "NumberRecognizer",
    "scientificNotation": false,
    "ordinals": true,
	"romans": false,
	"ordinalsLang": "en"
}

Flags

Lex-Item Flags:

  • NUMBER - Flagged on all tokens which are numbers according to the rules above.

Vertex Flags:

None.

Example

Code Block
languagetext
themeFadeToGrey
V----------[1984 42 -10 3.14 ]-----------V  
^--[1984]--V--[42]--V--[-10]--V--[3.14]--^  

Item [1984] - [NUMBER,TOKEN]
Item [42]   - [NUMBER,TOKEN]
Item [-10]  - [NUMBER,TOKEN]
Item [3.14] - [NUMBER,TOKEN]