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0 pointsJohnny5554y ago0 comments

The end of that article is a good reminder of the units command, I've been using Google for units conversion for so long that I forgot about the standalone units. It even comes standard with OSX.

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11 comments · 2 top-level

dhosek4y ago· 6 in thread

Is there an equivalent command for doing things like 147 days from today or days since 21 jun 2021 or 88 days after 15 Aug 2021? This is the one thing I really wish was in Spotlight (I use spotlight for unit conversion and calculations which is really handy).

spiffytech4y ago

WolframAlpha works well for those types of calculations.

bewuethr4y ago

With GNU date (but not the BSD-based macOS date, I believe), and not all that convenient for "days since":

  $ date -d 'today + 147 days' +%F
  2022-02-23
  
  $ echo $(( ($(date +%s) - $(date -d '2021-06-21' +%s)) / 86400 ))
  100
  
  $ date -d '2021-08-15 + 88 days' +%F
  2021-11-11

pajko4y ago

https://www.timeanddate.com/date/dateadded.html

dhosek4y ago

To clarify, I was thinking a quick command line thing. Right now, I do it in a browser (both DuckDuckGo and Google produce the answer easily enough).

zadwang4y ago

The unix date command does this.

1 more reply

mark-r4y ago

I use the Python datetime module for stuff like that. Excel can be useful too, since it treats dates as a number of days.

acidburnNSA4y ago· 3 in thread

I love the GNU units program so much. I think I use it at least 4 times/week. It's useful for kitchen conversions and also quick nuclear fuel burnup calcs. For example I used it on this blog post covering the long-term sustainability of nuclear fuel resources on earth.

https://whatisnuclear.com/blog/2020-10-28-nuclear-energy-is-...

a13692099934y ago

> It's useful for kitchen conversions and also quick nuclear fuel burnup calcs.

Also electrical engineering and estimates of the feasibility of brute-forcing cryptographic primitives using the mass of the observable universe as fuel.

LargoLasskhyfv4y ago

Interesting kitchen you have. Calculating nuclear fuel burnup.

I wonder what's cooking? Does it glow in the dark? ;>

kergonath4y ago

> I wonder what's cooking?

Yellow cake.

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