topic Re: Where is the documentation for Hash functions with DS2. in SAS Programming

Where is the documentation for Hash functions with DS2.

harlananelson — Sun, 08 Jul 2018 20:45:09 GMT

Where is the documentation for hash functions for use with DS2. I found the SAS component language link here: http://documentation.sas.com/?docsetId=lecompobjref&docsetTarget=p03cettn9j89vtn1n8aq7k341k58.htm&docsetVersion=9.4&locale=en

Unfortunately, this documentation does not work with

proc ds2

I don't really understand why there would be a difference, but I have tried sample code with ds2 and it does not work. Then I have been able to accomplish the same thing with different syntax. So there is clearly a difference.

Here is code from the components documentation with my `proc ds2` added. The declaration has to change when using DS2. DS2 used the `init()` method instead of `if _n_ = 1`. I have not been able to parameterize the `output` to accomplish a similar task.



data table;
  input key data $;
  datalines;
  531 yellow
  620 green
  531 blue
  908 orange
  620 brown
  143 purple
 run;

proc ds2;

data _null_;
length key 8 data $ 8;
if (_n_ = 1) then do;
    declare hash myhash;
    myhash = _new_ hash (dataset: "table", duplicate: "r");
    rc = myhash.definekey('key');
    rc = myhash.definedata('data');
    myhash.definedone();
 end;
rc = myhash.output(dataset:"otable");

enddata;
run;
quit;

It certainly would be interesting to see how to do this in DS2, but more importantly, I would like a link to the proper documentation, and possibly and explanation of why there are two separate syntaxes.

Re: Where is the documentation for Hash functions with DS2.

ChrisBrooks — Sun, 08 Jul 2018 21:26:46 GMT

In DS2 hashes are implemented as predefined packages. You'll find the documentation on page 119 of this document http://documentation.sas.com/api/docsets/ds2pg/9.4/content/ds2pg.pdf?locale=en and the hash iterator package is documented on page 131

Re: Where is the documentation for Hash functions with DS2.

harlananelson — Sun, 08 Jul 2018 22:12:37 GMT

From the document you pointed to: there is the link to

http://documentation.sas.com/?docsetId=ds2ref&docsetTarget=p1cnwa3vwltaqgn1fnowe2jqxl8y.htm&docsetVersion=9.4&locale=en

Your document seems to be a white paper and this link is the official documentation.

Re: Where is the documentation for Hash functions with DS2.

Reeza — Mon, 09 Jul 2018 01:03:53 GMT

Both are versions of documentation. @ChrisBrooks is the Programmers Guide (see bottom right corner of cover page where it states documentation) and the release date is pretty new - January 11, 2018.

In general the programmers guide is more of a tutorial type document whereas the documentation is a bit more formal.

@harlananelson wrote:

From the document you pointed to: there is the link to

http://documentation.sas.com/?docsetId=ds2ref&docsetTarget=p1cnwa3vwltaqgn1fnowe2jqxl8y.htm&docsetVersion=9.4&locale=en

Your document seems to be a white paper and this link is the official documentation.