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REXX Loop

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Cweinber21

Cweinber21

Technical User
Sep 13, 2018
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Hello all,
I'm having some difficulty looping through a queued() list and retrieving only information that's displayed more than 5 times. I have working JCL which uses PGM=ISRSUPC and scans through the syslog gathering information. I then use REXX coding to iterate through that information and only show the information needed. I would like to use REXX to loop through this information and only display entries that occur more than 5 times. Basically I'd like to grab the first entry then loop through the dataset seeing if it occurs more than 5 times, if so, then queue that information and move onto the next entry and perform the same task. Any information would be greatly appreciated. Thanks
 
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Hi Cweinber21,

First iterate over the queue with DO WHILE QUEUED() and extract all queue items with PARSE PULL and count their occurrence into a stem.
Than you can iterate over your stem and select only those items which occurrence is more than 5.

Here is an little example: cweinber21.rex
Code: 
[COLOR=#0000ff]/* create queue of some items */[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"eggs"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"eggs"[/color]
[COLOR=#a52a2a][b]queue[/b][/color] [COLOR=#ff00ff]"foobar"[/color]

[COLOR=#0000ff]/* add queued items occurrence into stem */[/color]
occurs. [COLOR=#a52a2a][b]=[/b][/color] 0
[COLOR=#a52a2a][b]do [/b][/color][COLOR=#a52a2a][b]while[/b][/color][COLOR=#a52a2a][b] [/b][/color][COLOR=#008b8b]queued()[/color] [COLOR=#a52a2a][b]<>[/b][/color] 0
  [COLOR=#a52a2a][b]parse pull[/b][/color] item
  [COLOR=#0000ff]--say item[/color]
  [COLOR=#0000ff]/* count item occurrences */[/color]
  occurs.item [COLOR=#a52a2a][b]=[/b][/color] occurs.item + 1
[COLOR=#a52a2a][b]end[/b][/color]

[COLOR=#0000ff]/* show the occurrence of individual items */[/color]
[COLOR=#a52a2a][b]say[/b][/color] [COLOR=#ff00ff]'all queue items occurrence:'[/color]
[COLOR=#a52a2a][b]do item [/b][/color][COLOR=#a52a2a][b]over[/b][/color] occurs.
 [COLOR=#a52a2a][b]say[/b][/color] item [COLOR=#ff00ff]'-->'[/color] occurs.item
[COLOR=#a52a2a][b]end[/b][/color]
[COLOR=#a52a2a][b]say[/b][/color]

[COLOR=#0000ff]/* display only those items which occurs more than 5 times */[/color]
[COLOR=#a52a2a][b]say[/b][/color] [COLOR=#ff00ff]'items that occur more than 5 times:'[/color] 
[COLOR=#a52a2a][b]do item [/b][/color][COLOR=#a52a2a][b]over[/b][/color] occurs.
  [COLOR=#a52a2a][b]if[/b][/color] occurs.item [COLOR=#a52a2a][b]>[/b][/color] 5 [COLOR=#a52a2a][b]then[/b][/color] [COLOR=#a52a2a][b]do[/b][/color]
    [COLOR=#a52a2a][b]say[/b][/color] [COLOR=#ff00ff]"item '"[/color]item[COLOR=#ff00ff]"'"[/color] [COLOR=#ff00ff]'occurs in the queue'[/color] occurs.item [COLOR=#ff00ff]'times.'[/color]
  [COLOR=#a52a2a][b]end[/b][/color]
[COLOR=#a52a2a][b]end[/b][/color]

Output:
Code: 
$ rexx cweinber21.rex
all queue items occurrence:
baz --> 3
bar --> 3
eggs --> 2
foobar --> 1
spam --> 10
foo --> 7

items that occur more than 5 times:
item 'spam' occurs in the queue 10 times.
item 'foo' occurs in the queue 7 times.
 
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Thanks for the quick reply Mikrom. I haven't used the Do -- Over coding before. Unfortunately when running this I'm receiving an error "Invalid whole number". I've been testing my code and even created a member and tried your code and I'm receiving the same error. Have you seen this error before? I'll continue messing around. Thanks again for the information
 
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DO OVER is probably not standard REXX, but only enhancement in Open Object REXX which I'm using.
 
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So, I try it now differently using standard REXX functionality only, but here I additionally need a list of unique items.

Now try this:
Code: 
[COLOR=#0000ff]/* create queue of some items */[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"eggs"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"eggs"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foobar"[/color]

[COLOR=#0000ff]/* add queued items occurrence into stem */[/color]
occurs. [COLOR=#804040][b]=[/b][/color] 0
items_list [COLOR=#804040][b]=[/b][/color] [COLOR=#ff00ff]''[/color]
[COLOR=#804040][b]do [/b][/color][COLOR=#804040][b]while[/b][/color][COLOR=#804040][b] [/b][/color][COLOR=#008080]queued()[/color] [COLOR=#804040][b]<>[/b][/color] 0
  [COLOR=#804040][b]parse pull[/b][/color] item
  [COLOR=#0000ff]--say item[/color]
  [COLOR=#0000ff]/* add item to items_list if not present */[/color]
  [COLOR=#804040][b]if[/b][/color] [COLOR=#008080]wordpos([/color]item[COLOR=#804040][b],[/b][/color] items_list[COLOR=#008080])[/color] [COLOR=#804040][b]=[/b][/color] 0 [COLOR=#804040][b]then[/b][/color] [COLOR=#804040][b]do[/b][/color]
    items_list [COLOR=#804040][b]=[/b][/color] items_list item
  [COLOR=#804040][b]end[/b][/color]  
  [COLOR=#0000ff]/* count item occurrences */[/color]
  occurs.item [COLOR=#804040][b]=[/b][/color] occurs.item [COLOR=#804040][b]+[/b][/color] 1
[COLOR=#804040][b]end[/b][/color]

[COLOR=#0000ff]/* show the occurrence of individual items */[/color]
[COLOR=#804040][b]say[/b][/color] [COLOR=#ff00ff]'all queue items occurrence:'[/color]
[COLOR=#804040][b]do[/b][/color] j[COLOR=#804040][b]=[/b][/color]1 [COLOR=#804040][b]to[/b][/color] [COLOR=#008080]words([/color]items_list[COLOR=#008080])[/color]
  item [COLOR=#804040][b]=[/b][/color] [COLOR=#008080]word([/color]items_list[COLOR=#804040][b],[/b][/color] j[COLOR=#008080])[/color]
  [COLOR=#804040][b]say[/b][/color] item [COLOR=#ff00ff]'-->'[/color] occurs.item
[COLOR=#804040][b]end[/b][/color]
[COLOR=#804040][b]say[/b][/color]

[COLOR=#0000ff]/* display only those items which occurs more than 5 times */[/color]
[COLOR=#804040][b]say[/b][/color] [COLOR=#ff00ff]'items that occur more than 5 times:'[/color] 
[COLOR=#804040][b]do[/b][/color] j[COLOR=#804040][b]=[/b][/color]1 [COLOR=#804040][b]to[/b][/color] [COLOR=#008080]words([/color]items_list[COLOR=#008080])[/color]
  item [COLOR=#804040][b]=[/b][/color] [COLOR=#008080]word([/color]items_list[COLOR=#804040][b],[/b][/color] j[COLOR=#008080])[/color]
  [COLOR=#804040][b]if[/b][/color] occurs.item [COLOR=#804040][b]>[/b][/color] 5 [COLOR=#804040][b]then[/b][/color] [COLOR=#804040][b]do[/b][/color]
    [COLOR=#804040][b]say[/b][/color] [COLOR=#ff00ff]"item '"[/color]item[COLOR=#ff00ff]"'"[/color] [COLOR=#ff00ff]'occurs in the queue'[/color] occurs.item [COLOR=#ff00ff]'times.'[/color]
  [COLOR=#804040][b]end[/b][/color]
[COLOR=#804040][b]end[/b][/color]

Output:
Code: 
$ rexx cweinber21.rex
all queue items occurrence:
foo --> 7
bar --> 3
baz --> 3
spam --> 10
eggs --> 2
foobar --> 1

items that occur more than 5 times:
item 'foo' occurs in the queue 7 times.
item 'spam' occurs in the queue 10 times.

Hopefully this will work for you.
 
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And here is a little modification where items_list is not a big string delimited by spaces, but other stem.
It should work for you too.
Code: 
[COLOR=#0000ff]/* create queue of some items */[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"eggs"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foo"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"bar"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"baz"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"spam"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"eggs"[/color]
[COLOR=#804040][b]queue[/b][/color] [COLOR=#ff00ff]"foobar"[/color]

[COLOR=#0000ff]/* add queued items occurrence into stem */[/color]
occurs. [COLOR=#804040][b]=[/b][/color] 0
nr_items [COLOR=#804040][b]=[/b][/color] 0
items_list. [COLOR=#804040][b]=[/b][/color] [COLOR=#ff00ff]''[/color]
[COLOR=#804040][b]do [/b][/color][COLOR=#804040][b]while[/b][/color][COLOR=#804040][b] [/b][/color][COLOR=#008080]queued()[/color] [COLOR=#804040][b]<>[/b][/color] 0
  [COLOR=#804040][b]parse pull[/b][/color] item
  [COLOR=#0000ff]--say item[/color]
  [COLOR=#0000ff]/* add item to items_list if not present */[/color]
  [COLOR=#804040][b]if[/b][/color] occurs.item [COLOR=#804040][b]=[/b][/color] 0 [COLOR=#804040][b]then[/b][/color] [COLOR=#804040][b]do[/b][/color]
    nr_items [COLOR=#804040][b]=[/b][/color] nr_items [COLOR=#804040][b]+[/b][/color] 1
    items_list.nr_items [COLOR=#804040][b]=[/b][/color] item
  [COLOR=#804040][b]end[/b][/color]  
  [COLOR=#0000ff]/* count item occurrences */[/color]
  occurs.item [COLOR=#804040][b]=[/b][/color] occurs.item [COLOR=#804040][b]+[/b][/color] 1
[COLOR=#804040][b]end[/b][/color]

[COLOR=#0000ff]/* show the occurrence of individual items */[/color]
[COLOR=#804040][b]say[/b][/color] [COLOR=#ff00ff]'all queue items occurrence:'[/color]
[COLOR=#804040][b]do[/b][/color] j[COLOR=#804040][b]=[/b][/color]1 [COLOR=#804040][b]to[/b][/color] nr_items
  item [COLOR=#804040][b]=[/b][/color] items_list.j
  [COLOR=#804040][b]say[/b][/color] item [COLOR=#ff00ff]'-->'[/color] occurs.item
[COLOR=#804040][b]end[/b][/color]
[COLOR=#804040][b]say[/b][/color]

[COLOR=#0000ff]/* display only those items which occurs more than 5 times */[/color]
[COLOR=#804040][b]say[/b][/color] [COLOR=#ff00ff]'items that occur more than 5 times:'[/color] 
[COLOR=#804040][b]do[/b][/color] j[COLOR=#804040][b]=[/b][/color]1 [COLOR=#804040][b]to[/b][/color] nr_items
  item [COLOR=#804040][b]=[/b][/color] items_list.j
  [COLOR=#804040][b]if[/b][/color] occurs.item [COLOR=#804040][b]>[/b][/color] 5 [COLOR=#804040][b]then[/b][/color] [COLOR=#804040][b]do[/b][/color]
    [COLOR=#804040][b]say[/b][/color] [COLOR=#ff00ff]"item '"[/color]item[COLOR=#ff00ff]"'"[/color] [COLOR=#ff00ff]'occurs in the queue'[/color] occurs.item [COLOR=#ff00ff]'times.'[/color]
  [COLOR=#804040][b]end[/b][/color]
[COLOR=#804040][b]end[/b][/color]
 
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Thanks Mikrom. Yea DO OVER isn't support here :( I was modifying the original coding and it looks like I was on the right track since I had sorta the same information you just provided. With what I have and your information, I should be good. I appreciate the help
 
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