QUICK REFERENCE: CLASSES DATE AND TIME

We don't need to create an object for the Class Date. We can use Date like prefix.

Like in the previous lesson, we have some mini-exercices to show all the methods working. Use the Workspace and Transcript windows inside the Squeak-Croquet environment.


dateAndTimeNow

Answer an array whose first element is today and second element is the time. You can read an array element using "at:"

Example 

arrDT:= Date dateAndTimeNow.
D:=arrDT at:1.
T:=arrDT at:2.
Transcript show:D.
Transcript show:'------'.
Transcript show:T.

Result 

15 November 2004------1:51:41 pm


today

Example 

D:= Date today.
Transcript show:D.

Result 

15 November 2004


today weekday

Example 

wD:= Date  today weekday.
Transcript show:wD.

Result 

Monday


today julianDayNumber

Number of days (or part of a day) elapsed since noon GMT on January 1st, 4713 B.C.

Example 

jD:= Date  today julianDayNumber.
Transcript show:jD.

Result 

2453325


today monthIndex

Example 

mI:= Date  today monthIndex.
Transcript show:mI.

Result 

11


today weekdayIndex


today monthName


today year


today addDays:n

Date that is n days after today

Example 

nD:= Date  today addDays:2.
Transcript show:nD.

Result 

17 November 2004


today subtractDays:n


today asGregorian.

Return an array of integers #(dd mm yyyy). You can read an array element using "at:"

Example 

gD:= Date today asGregorian.
dG:=gD at:1.
Transcript show:dG

Result 

15


today asSeconds.

Seconds between 1 January 1901 and the NOW. Useful in creation of timers. Reading the values in 2 moments you can know the interval in seconds.

Example 

sN:= Date  today asSeconds.
Transcript show:sN

Result 

3277929600


today mmddyyy

The usual format:mm/dd/yyyy.

Example 

mDY:= Date  today mmddyyyy.
Transcript show:mDY

Result 

11/15/2004

We don't need to create an object for the Class Time. We can use Time like prefix.


now

Example 

|nN| 
nN:= Time  now .
Transcript show:nN

Result 

3:13:09 pm


now hours

Example 

nH:= Time  now hours .
Transcript show:nH

Result 

15


now minutes


now seconds 


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