This project holds data for generating Hebrew numerals. hebrew-special-numbers has three goals:

• Platform-independence
• Ease-of-use
• Freedom

• Compatible with YAML 1.1 and higher.
• Gershayim marks (ט״ו vs טו) are optional.
• Includes style extensions for:
  • chaipower - Uses חי instead of יח for 18.
  • legibility - Spells out commonly-confused letters for clarity.
  • fullspell - Spells out all single-letter numerals.
  • av, sag, mah, ban - Contains letter spellings for Kabbalistic applications.
• Free and open-source under the non-restrictive MIT License.

In making programs that produce Hebrew numerals, most numbers follow a set pattern of combining letters in order, from largest to smallest, until the proper gematria sum is produced. For example, 123:

• ק = 100
• כ = 20
• ג = 3

This yields קכ״ג.

To aid in such regular cases, this project includes a lookup table for generating regular numerals. See styles/defaults.yml, the 'numerals' and 'separators' keys.

However, many such letter combinations produce words that are customarily avoided. On one side of the spectrum, since it is forbidden to take the Divine Name in vain, combinations otherwise spelling out Divine Names, like for 15 and 16, are spelled as 9+6 (ט״ו) or 9+7 (ט״ז), rather than as 10+5 and 10+6. On the opposite end of the spectrum, 270 would normally spell "evil" and 298 would normally spell "murder." Other examples exist. The solution for such words is to change the order to spell something else; for example, 270 changes from "evil" to "awaken" (ע״ר), and 298 from "murder" to "wash" (רח״צ).

Since many such special exceptions exist, this project includes a list mapping the numerical values to the irregular Hebrew numeral spelling. See styles/defaults.yml, in the 'specials' key.

In addition, sometimes single-letter numerals are spelled out in full. For such cases, the legibility, fullspell, av, sag, mah and ban styles may be useful.

1. Download the latest release and expand it. On a Unix-like command line:

   tar -xf hebrew-special-numbers-*.tar.gz  # produces hebrew-special-numbers/

   OR

   If you also want to get the example code and this README, clone the entire git repository instead with

   git clone https://github.com/chaimleib/hebrew-special-numbers.git

2. Use a YAML library to load hebrew-special-numbers/styles/default.yml into an associative array. For example, in Python (with the pyyaml package installed):

   import yaml
   hsn = yaml.load(open('hebrew-special-numbers/styles/default.yml', encoding="utf8"), Loader=yaml.SafeLoader)

3. Optional: It is possible to create styles by cascading styles on top of each other. Load in any additional styles and recursively merge them into your associative array. This may require defining a recursive merge function.

   # using merge() by Andrew Cooke, https://stackoverflow.com/a/7205107
   chaipower = yaml.load(open('hebrew-special-numbers/styles/chaipower.yml', encoding="utf8"), Loader=yaml.SafeLoader)
   hsn = merge(hsn, chaipower)

4. Optional: To clarify what order the styles were added, update the 'order' key:

   hsn['version']['order'] = ['default', 'chaipower']

Basic sample code for values less than 1000, in Python:

def hebrew_numeral(val, gershayim=True):
    # 1. Lookup in specials
    if val in hsn['specials']:
        retval = hsn['specials'][val]
        return add_gershayim(retval) if gershayim else retval

    # 2. Generate numeral normally
    parts = []
    rest = str(val)
    while rest:
        digit = int(rest[0])
        rest = rest[1:]
        if digit == 0: continue
        power = 10 ** len(rest)
        parts.append(hsn['numerals'][power * digit])
    retval = ''.join(parts)
    # 3. Add gershayim
    return add_gershayim(retval) if gershayim else retval

def add_gershayim(s):
    if len(s) == 1:
        s += hsn['separators']['geresh']
    else:
        s = ''.join([
            s[:-1],
            hsn['separators']['gershayim'],
            s[-1:]
        ])
    return s

See also test/test.py.