Shortest script that gives the time passed since a Unix timestamp

Question

What you need to do to win this challenge is to write the shortest "timeago" script that outputs the number of decades, years, weeks, days, hours, minutes, and seconds between a given Unix timestamp and the time the script is run.

You must give the time difference in "lowest terms", e.g. 1 week not 7 days, 9 years not 0 decades 9 years. You also must use plural forms correctly, e.g. 1 day not 1 days.

Your script must be accurate to within plus or minus 1 second (so the exact second rounding method is unimportant).

Time Equivalency Table
1 decade = 10 years
1 year = 31536000 seconds (not technically correct but close enough)
1 week = 7 days
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds

The output should be of the form

A decade(s) B year(s) C week(s) D day(s) E hour(s) F minute(s) G second(s)

where A...G are all non-negative integers and the s is only there for plurals.

Notes

• The timestamp will always be a time from the past. It may be negative.
• Input and output may be anything reasonable: stdin/stdout, function input and return value, etc.
• You may not use any tools that already do this. i.e. if your language has a timesince(timestamp) function built in you may not use that function.

I have vastly edited this to make it clearer in hopes to assuage the somewhat silly battle between new users with unclear questions and old users who require perfection. It was not a terrible question (though now it may be too similar to this).

Given that enough time is passed since the last answer, I declare Three If By Whiskey with its 177 bytes Ruby implementation the winner of this context!

Answer 1

Ruby, 184 177

->n{x=Time.now.to_i-n;d=[3650*y=86400,365*y,7*y,y,3600,60,1];(0..6).map{|i|c=x/d[i];(x%=d[i]*c;"#{c} #{%w[decade year week day hour minute second][i]}#{c<2?'':'s'}")if c>0}*' '}

There's nothing particularly clever here, but I suspect it's still very close to optimal.

Example run

p ->n{x=Time.now.to_i-n;d=[3650*y=86400,365*y,7*y,y,3600,60,1];(0..6).map{|i|c=x/d[i];(x%=d[i]*c;"#{c} #{%w[decade year week day hour minute second][i]}#{c<2?'':'s'}")if c>0}*' '}[0]
"4 decades 4 years 41 weeks 3 days 14 hours 20 minutes 48 seconds"

Answer 2

J , 165

;' '&,@":&.>@((#~([:*&>{."1))@((;:' decades years weeks days hours minutes seconds')(],.([}.~[:-1=])&.>)<"0@(_ 10 52 7 24 60 60&#:)@(-~([:".@}:[:2!:0'date +%s'"_))))

Can probably be golfed more. Uses a shell call to date for getting the current unix epoch time, since Unix epoch is unavailable in J.

Example run:

;' '&,@":&.>@((#~([:*&>{."1))@((;:' decades years weeks days hours minutes seconds')(],.([}.~[:-1=])&.>)<"0@(_ 10 52 7 24 60 60&#:)@(-~([:".@}:[:2!:0'date +%s'"_)))) 0
4 decades 4 years 41 weeks 3 days 12 hours 54 minutes 1 second

Answer 3

Python - 183

import time;t=int(time.time()-input());d=86400
for f,u in zip((3650*d,365*d,7*d,d,3600,60,1),'decade year week day hour minute second'.split()):
 if t/f:print`t/f`,u+'s'*(t/f>1),;t%=f

Output for a timestamp 999996400 seconds in the past:

3 decades 1 year 37 weeks 46 minutes 39 seconds

Answer 4

JavaScript, 392

t=function(c){i=function(){var a=+new Date/1e3-c,b=document;29>a?b.write("just now"):60>a?b.write((a|0)+" seconds ago"):60<a&&120>a?b.write("1 minute ago"):60>a/60?b.write((a/60|0)+" minutes ago"):60<a/60&&120>a/60?b.write("1 hour ago"):24>a/3600?b.write((a/3600|0)+" hours ago"):24<a/3600&&48>a/3600?b.write("1 day ago"):1<=a/86400&&b.write((a/86400|0)+" days ago")};i();setInterval(i,3e4)};

Also the unminified code for the curious ones

t = function(timestamp){

i = function() {
var diff = (+new Date/1e3)-(timestamp),
d = document;

    if( (diff) < 29) {

        d.write( 'just now' )
    }
    else if( diff < 60) {

        d.write( ( (diff) |0 ) + ' seconds ago' )
    }
    else if( diff > 60 && diff < 120) {
        d.write(  '1 minute ago' )
    }
    else if( (diff)/60 < 60) {
        d.write( ( (diff)/60 |0 ) + ' minutes ago' )
    }
    else if( (diff)/60 > 60 && (diff)/60 < 120) {
        d.write( '1 hour ago' )
    }
    else if( (diff)/3600 < 24) {
        d.write( ( (diff)/3600 |0 ) + ' hours ago' )
    }
    else if( (diff)/3600 > 24 && (diff)/3600 < 48) {
        d.write( '1 day ago' )
    }
    else if( (diff)/86400 >= 1) {
        d.write( ( (diff)/86400 |0 ) + ' days ago' )
    }
  }

i()

setInterval(i, 3e4)

}

It updates every 30 seconds and calculates both singular and plural.

To run it use t(unix_timestamp)

Answer 5

Javascript, 287

function p(e,n){return e>2?e+" "+n+"s ":e+" "+n+" "}function t(e){n=new Date/1e3,l=e-n,c=1,m=60,h=60*m,d=24*h,w=7*d,y=365*d,a=10*y,s="",v={a:"Decade",y:"Year",w:"Week",d:"Day",h:"Hour",m:"Minute",c:"Second"};for(i in v)k=v[i],i=window[i],(r=Math.floor(l/i))>0&&(s+=p(r,k)),l%=i;alert(s)}

to run use t(secondsInFuture);

Answer 6

Javascript, 263

i=[315360000,31536000,604800,86400,3600,60,1];s=['decade','year','week','day','hour','minute','second'];function g(d){return p(parseInt((new Date().getTime()-d)/1000), 0);}function p(d,n){k=d-d%i[n];r=k/i[n];return (r>0?r+' '+s[n]+'(s) ':'')+(n<6?p(d-k,n+1):'');}

to run from the Javascript console, call

g(unixTimestamp);