purescript-formatters

A PureScript alternative to numeral.js, moment.js, etc.

Install formatters with Spago:

spago install formatters

Number formatters

Formatter has following properties

• Number of digits before dot
• Number of digits after dot
• Should sign be printed for positive numbers
• Should thousands be separated by comma
• Should output string have abbreviations (like K or M)

Number will be padded with zeros to have at least this number of leading zeros. This doesn't restrict number to have more digits then leading zeros in format string.

• 0000.0 will show 4 digits: 12 → "0012.0", 1234 → "1234.0"
• 00.0 will show only 2 digits : 12 → "12.0", 1234 → "1234.0"

Number of digits after dot is set by number of trailing zeros (note the rounding)

• 0.000 will show 3 digits: 0.12345 → "0.123", 12.98765 → "12.988"
• 0.0 will show only 1 digit: 0.12345 → "0.1", 12.98765 → "13.0"

If number is lesser then zero - is always printed. Otherwise you could specify + in format string

• +0: 12.0 → "+12", -34.8 → "-35"
• 0: 12.0 → "12", -34.8 → "-35"

Thousands separator is specified as ,0 please note that this 0 isn't counted as leading.

• 00,0: 1234567890 → "1,234,567,890.0", 1 → "1.0"`

For abbreviation one could use a flag. In general it tries to find the closest power of thousand and then use formatter to result of division of input number and that power.

• 0a: 1234567 → "1M", 1 → "1"

Date/Time formatters

This is a subset of common format/parse strings currently supported.

• YYYY - Full Year (1999)
• YY - 2 digit year (99)
• MMMM - Full Month (January)
• MMM - Short Month (Jan)
• DD - Padded Day (02)
• D - Day of month (2)
• X - Unix Timestamp (1506875681)
• E - Day of Week (2)
• dddd - DOW Name (Monday)
• ddd - DOW Name Short (Mon)
• HH - 24 Hour (13)
• hh - 12 Hour (1)
• a - Meridiem (am/pm)
• mm - Minutes Padded (02)
• m - Minutes (2)
• ss - Seconds Padded (02)
• s - Seconds (2)
• S - MilliSeconds (4)
• SS - MilliSeconds (04)
• SSS - MilliSeconds (004)

Full list is defined here

formatters documentation is stored in a few places:

1. Module documentation is published on Pursuit.
2. Written documentation is kept in the docs directory.
3. Usage examples can be found in the test suite.

If you get stuck, there are several ways to get help:

• Open an issue if you have encountered a bug or problem.
• Ask general questions on the PureScript Discourse forum or the PureScript Discord chat.

You can contribute to formatters in several ways:

1. If you encounter a problem or have a question, please open an issue. We'll do our best to work with you to resolve or answer it.

2. If you would like to contribute code, tests, or documentation, please read the contributor guide. It's a short, helpful introduction to contributing to this library, including development instructions.

3. If you have written a library, tutorial, guide, or other resource based on this package, please share it on the PureScript Discourse! Writing libraries and learning resources are a great way to help this library succeed.