Module talk:Strip to numbers
(Redirected from Module talk:Strip to numbers/doc)
Latest comment: 9 years ago by SMcCandlish in topic Current problems
Current problems
editObvious known issues:
- Matches all numbers, hyphen-minuses, and dots, and will:
- produce an invalid number from input like
font-size: -10%
(resolves to--10
) orapprox. 53.5
(resolves to.53.5
) - the opposite of the desired number for cases like
margin-left: 2.5em
(resolves to-2.5
) - probably-undesired concatenation from input like
42 chickens on 12 farms
(resolves to4212
)
- produce an invalid number from input like
It needs to only match on -
and .
when preceding a numeral, and to stop parsing and return a value when it reaches the first end of numeric data.
— SMcCandlish ☺ ☏ ¢ ≽ʌⱷ҅ᴥⱷʌ≼ 10:35, 18 July 2015 (UTC)
- WOSlinker's rewrite fixed all this. — SMcCandlish ☺ ☏ ¢ ≽ʌⱷ҅ᴥⱷʌ≼ 16:53, 18 July 2015 (UTC)
For later development
editA more advanced version that could be invoked directly or required by other modules, might do something like this:
- For any arbitrary input, trim all leading material until it hits any of:
- a numeral; or
- a
.
followed by a numeral; or - a
-
or the proper negative/minus glyph−
followed by either of:- a numeral, or by
.
followed by a numeral
- then retain that character;
- proceed to next character, and retain it if matches either:
- a numeral, or
- a
.
, unless one was matched earlier; - repeat until that fails (i.e. a second
.
is found, or any other non-numeral is found); - then trim everything after that;
- and do all this for multiple values passed,
- and even do it for multiple numbers found in the same value (or discard any found after the first, or something)
- In the division function:
- Accept arbitrary divisors;
- Round the results to arbitrary decimal places if necessary (default: two, as in
23.48
).
- A later super-badass version could add:
- recognize
^
ore
, andx
or×
or*
when found in a context that indicates an exponent (23.5x10^8
), and a few other such cases (e.g. characters used to indicate a truncated long/endless decimal) - find multiple numbers per input string, and separate them by something (e.g. a space or a comma) depending on which function is invoked
- recognize simple formulae
- recognize English words for numbers and convert to use digits
— SMcCandlish ☺ ☏ ¢ ≽ʌⱷ҅ᴥⱷʌ≼ 10:35, 18 July 2015 (UTC)