Feature #17339
Updated by sawa (Tsuyoshi Sawada) about 4 years ago
# Abstract Thousands, millions, ... should be expressible with `BigDecimal#to_s`. recognizable on BigDecimal#to_s. # Background `BigDecimal('1234567').to_s('3F')` returns "123 456 7.0". 7.0" # Proposal - Have an option with which that `BigDecimal('1234567').to_s('3F')` returns " _1 234 567_ .0". .0" - With decimal, `BigDecimal('1234567.8901234').to_s('3F')` should return "1 234 567.890 123 4". 4" - Default behavior should be the above in long term. - And/Or, it would be nice to have a pretty method name. I think #to_s('3F') has have universal use cases like money calculation. # Discussion - International System of Units aka SI defines 3-digit-grouping on long numeric sequence. https://www1.bipm.org/jsp/en/ViewCGPMResolution.jsp?CGPM=22&RES=10 - Original discussion in 1948 shows some example of 3-digit-grouping. https://www1.bipm.org/utils/common/pdf/CGPM/CGPM9.pdf#page=117 # Summary We want to have a natural format.