IBM Mainframe Forum

Hello all,

I want to write to Rexx to read in a member to a STEM variable and then check if a line has specific text, if so then replace it with new text, I am struggling to get my head around REXX syntax.

This is what I have tried so far:



I do hope this sort of code is possible using REXX, but I cannot seem to find any examples of this.

Any assistance with my code would be greatly appreciated!!

My goal is to replace a specific line in a member with a new line of text.

Thank you for your time!!

Code'd

a better construct would be ...



read the manual about the differences of using the strict comparison operator == V.S. the normal comparison operator =
and test Yourself with different tokens

remember that initially rexx treats everything as a string

also remember that == is not an assignment operator

These users thanked the author enrico-sorichetti for the post:

deucalion0 (Wed Dec 03, 2014 7:49 pm)

Enrico, thank you so very much, this is the second time you have been a great help to me with Rexx!

I appreciate you taking the time to explain your code to me as well!

I need to get used to Rexx, I come from Java and C#, and find Rexx syntax quite different.

What is your go to manual for Rexx?

I have bookmarked lots of sites but I do not know if there is just one ultimate resource.

Thanks again!

here is mother of the links for IBM software

http://www-03.ibm.com/systems/z/os/zos/ ... index.html

the rex stuff is in the TSO bookshelf

These users thanked the author enrico-sorichetti for the post:

deucalion0 (Wed Dec 03, 2014 8:34 pm)

Thank you Enrico, I have bookmarked this!


My problem is breaking down what i need to know, coming from different languages and using certain techniques, how to translate these techniques into Rexx.

For example, my next issue is trying to access a stem using a variable +1 like so:



I want to edit two lines of the stem variable within one loop of code by directly accessing the next stem index by adding 1 to I, but I get a bad arithmetic error.

So I looked at the arithmetic section of the IBM manual and the Stem variables section, without seeing an example of this. So either I am not very good at looking stuff up or I am trying to do something which cannot be done.

What area would you say that this problem comes under?

Again I appreciate your consistent help!

MYFILE.I+1

the stem *index MUST be a VARIABLE or CONSTANT ... not an expression

* index is a bit improper, stems are not really arrays

These users thanked the author enrico-sorichetti for the post:

deucalion0 (Thu Dec 04, 2014 1:06 am)

deucalion0 wrote:For example, my next issue is trying to access a stem using a variable +1 like so:

Select all

MYFILE.I+1 = "Some text"

I want to edit two lines of the stem variable within one loop of code by directly accessing the next stem index by adding 1 to I, but I get a bad arithmetic error.

or


or


And for what it's worth, case is rarely significant in REXX, but many of us prefer to see REXX written in lowercase.

These users thanked the author prino for the post:

deucalion0 (Thu Dec 04, 2014 1:06 am)

nice trick Robert !

Thank you very much Robert for the various ways in which I can achieve this! I have experimented tonight and have now gotten what I wanted as well as a better understanding of Rexx syntax!

Thank you also Enrico again for your explanations!