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LIST_OBS after specific date

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Last Post by bhoover 6 years ago

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jessicaw

(@jessicaw)

Posts: 434

Prominent Member

Topic starter

I am working on a form and I need to set a button to pull in all previous observations after a specific date. The date will be entered on the form.

Can anyone help me with how to make this work?

Posted : November 16, 2018 6:26 am

dcarpenter

(@dcarpenter)

Posts: 323

Reputable Member

Here is how I would do it:

{fn ListObsAfterDate(obsNameVar,dateVar){

//get the data from LIST_OBS into an array
ObsArray = getfield(LIST_OBS(obsNameVar,"Signed","Delimited","VALUE"),"|","")
resultStr = ""

//For loop to get the data items from each part of the original array
for c=1,c<=size(ObsArray),c=c+1 do
ObsArray[c] = getfield(ObsArray[c],"^","")
// this if statement compares the dates from LISTOB to the dateVar. If the Obsterm is older than dateVar, the entire for loop ends.
if DURATIONDAYS(ObsArray[c][2], DateVar) > 0 then
break
else
//if the Obsterm is later than dateVar, add it to the result string.
resultStr = resultStr + ObsArray[c][1] + " on " + ObsArray[c][2] + HRET
endif
endfor

return resultStr
}}

If you put this in your form, then the code for the button would look like this:

ListObsAfterDate("Height","01/06/2015")

and the results should be:

56 on 09/17/2018
56 on 02/13/2018
56 on 09/16/2016
56 on 05/23/2016
48 on 01/28/2016
48 on 01/25/2016
71 on 11/27/2015
61 on 07/06/2015
60 on 02/03/2015
60 on 01/06/2015

Run it again with a later date:

ListObsAfterDate("Height","01/01/2018")

and you get:

56 on 09/17/2018
56 on 02/13/2018

Please let me know if you have any questions on how it works, or how to tweak it to fit your needs.

Thank you, and happy coding!

Daniel C.

Posted : November 16, 2018 9:40 am

bhoover

(@bhoover)

Posts: 360

Honorable Member

Hello,

I like dcarpenter's answer. I also wanted to point out that there appears to be a ccc function that will do something similar. I've been poking around in the ccc files for another project and I found the following functions:

ccc_LV(aa,bb)

ccc_LD(aa,bb)

Here is comment from the ccc_LV function. The CCC_LD function appears to be the same except is returns the date value instead of the obs value:

/* aa is obs heading; bb is duration in days to extract; if bb is empty or does not exist,
then last value will be returned; return last obs value if within date range */

The functions are in the CCC-fndef8.ccc file. I have never used them before, so I can't confirm that they would return what you would want, but I figured I would post this for reference.

Thanks,

Brad

Posted : November 19, 2018 3:55 am

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