Allow specify numbers with suffixes
Jerry Schulteis
jdschulteis at yahoo.com
Fri Nov 24 23:22:55 UTC 2017
I see the BigInt proposal at the moment uses a suffix 'n' for BigInt literals.That would conflict with Andrey's desire to have it mean metric nano (* 10**-9).Maybe tagged template literals would do?
populationSize = SI`100M`; setTimeout(foo, millis`30s`);
On Thursday, November 23, 2017, 7:22:41 AM CST, Isiah Meadows <isiahmeadows at gmail.com> wrote:
Check out the various unit-related proposals that have spawned on this list, and note that IIRC the BigInt proposal [1] also notes that as a possible future expansion.
[1]: https://github.com/tc39/proposal-bigint
On Thu, Nov 23, 2017, 08:17 Andrey Muzalevsky <face2world at gmail.com> 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 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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