Allow specify numbers with suffixes
kdex
kdex at kdex.de
Thu Nov 23 13:22:33 UTC 2017
Please see [1].
[1] https://github.com/littledan/proposal-extensible-numeric-literals
On Thursday, November 23, 2017 2:16:44 PM CET Andrey Muzalevsky wrote:
> Idea is simple, also is simple to implement and do not conflicting with
> existing standard
>
> Readability of javascript can be improved in certain cases like:
>
> - populationSize = 100000000
> - maxMessageSize = 4194304
> - setTimeout(foo, 30000)
> - if(timeElapsed > 100) {...}
>
> This can be changed to following:
>
> - populationSize = 100M
> - maxMessageSize = 4MB
> - setTimeout(foo, 30s)
> - if(timeElapsed > 0.1s) {...}
>
> Also it will be great to support floating number, most convinient way to do
> this is tract suffix just like a multipler, so
>
> 1.5MB == 1.5 * 1MB
>
> Supported suffixes, as I see them:
>
> - Metric prefixes group
> - follow SI Prefixes
> <http://www.npl.co.uk/reference/measurement-units/si-prefixes/>
> scheme, to decrease entrance level
> - allowing to use short and full form
> - it is case sensetive (bad, but everyone knows it)
> - not sure about μ, it either:
> - (my preference) supported as UTF-8 sumbol, always can be replaced
> with 'full' form when needed(is it recommended to use?)
> - has a replace symbol which can be easily typed
> - allowed only in full form
> - samples:
> - 4M == 4mega == 4 000 000
> - 5n == 5nano == 0.000 000 005
> - 1micro == 0.000 001
> - Bytes prefixes group
> - Metric prefixes turned into bytes prefixes by adding either 'B' to
> short form, or 'byte[s]' to full form
> - Byte suffix is written in upper-case 'B', e.g. 'kB', 'MB', 'GB'
> - This is done to remove inconsistency with widely used
> bit/byte differentiation, e.g. `kb` and `KB` usually mean
> different things
> - Samples:
> - 1kB = 1kilobyte = 1024
> - 1MB = 1megabyte = 1024*1024
> - Time group, counted in milliseconds
> - s, sec = 1000
> - min = 60 * 1000
> - h, hr = 60 * 60 * 1000
> - d, day[s] = 24 * 60 * 60 * 1000
> - w, week[s] = 7 * 24 * 60 * 60 * 1000
> - Also it will be good to allow compound number definitions, samples
> - 1h 30min = 1h + 30min
> - 1mB 200kB = 1mB + 200kB
>
>
> What do you think?
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