Issue #20705 has been updated by matz (Yukihiro Matsumoto). We are not going to change the literal format of floating point values. But I think it's good to make Float/to_f to accept "0.e-9". Matz. ---------------------------------------- Feature #20705: Should "0.E-9" be a valid float value? https://bugs.ruby-lang.org/issues/20705#change-109639 * Author: kou (Kouhei Sutou) * Status: Open ---------------------------------------- Ruby doesn't accept "0.E-9" as a valid float value: ```console $ ruby -e 'Float("0.E-9")' <internal:kernel>:218:in 'Kernel#Float': invalid value for Float(): "0.E-9" (ArgumentError) from -e:1:in '<main>' ``` But other systems accept "0.E-9" as a valid float value: PostgreSQL: ```text => select 0.E-9; ?column? ------------- 0.000000000 (1 row) ``` MySQL: ```text
select 0.E-9; +-------+ | 0.E-9 | +-------+ | 0 | +-------+ 1 row in set (0.00 sec)
Python:
```console
$ python3 -c 'print(0.E-9)'
0.0
Node.js: ```console $ nodejs -e 'console.log(0.E-9)' 0 ``` Should Ruby accept "0.E-9" as a valid float value? FYI: I don't have an opinion of this. I just realized this by an issue from an user of a maintained library by me: https://github.com/apache/arrow/issues/43877 -- https://bugs.ruby-lang.org/