Cmd or Program to do ls -lrt | tail -1 as done in Unix

[Reno]

2. You want to subtract 1 from e.g. 26 to get 25? Or get the previous day's date?
I want previous day's date.

3. Boundry Conditions >> Meaning Month ends / Year conditions to get previous day's date.

smartjosh, here is the bat way to calculate date difference, source is from wiki, and i haven't tested it throughly, so may still contain bugs. if you did have access to vbscript, it's easier to do it with vbscript.

Code: [Select]

::source: http://en.wikipedia.org/wiki/Julian_day
@echo off & setlocal
if "%~1"=="" echo USAGE: %0 [interval] & goto:eof

for /f "skip=1 tokens=2-4 delims=(./-)" %%a in ('echo.^|date') do (
for /f "tokens=1-3 delims=./- " %%A in ('echo %date:~-10%') do (
set %%a=%%A& set %%b=%%B& set %%c=%%C
))
echo Today :%yy%%mm%%dd%
set/a mm=1%mm%-100,dd=1%dd%-100

::jd
set/a a=(14-mm)/12, y=yy+4800-a, m=mm+12*a-3
set/a jd=dd+ (153*m+2)/5 + 365*y + y/4 - y/100 + y/400 - 32045
::date interval
set/a jd+=%~1

::gd
set/a s1=jd+68569, n=4*s1/146097, s2=s1-(146097*n+3)/4, i=4000*(s2+1)/1461001
set/a s3=s2-1461*i/4+31, q=80*s3/2447, s4=q/11, e=s3-2447*q/80
set/a yy=100*(n-49)+i+s4, mm=q+2-12*s4, dd=e, gd=yy*10000+mm*100+dd
echo %1 :%gd%


test output

Code: [Select]

C:\>jd 10
Today   :20090330
10      :20090409

C:\>jd -1
Today   :20090330
-1      :20090329

C:\>jd -1000
Today   :20090330
-1000   :20060704