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"Loop Files

Hey Guys,

I would like to use loop files to loop over a bunch of tab delimited files and append them all together. It seems like this should be easily achievable with remember and recall but I cant seem to figure out how to set it up so that the first file is not appended more than once. Maybe I should Just CAT the files, however like that RM checks the attributes prior to appending.

Basically since only one file is accessed during each loop iteration somehow I need to start appending in the second iteration. ???

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haddock

Read one file, trash examples, loop and append all files, like this..

http://rapid-i.com/rapidforum/index.php/topic,2282.msg8989.html#msg8989

dragoljub

Hey Haddock,

I think I see what you mean however your link connects back to this page :P. What example did you have in mind?

-Gagi

haddock

Hi,

Oops. Just changed it.

dragoljub

The way I understand this would be to use a branch or select sub process to select when the first file is read.

I am running into the problem of extracting the loop file iteration value. If I extract apply_count or loop_count from the loop 'loop files' operator I can branch on the first iteration to remember the first file and then in the following loops append and remember the next files.

How can I extract the loop iteration from loop_files? I feel like I have tried all combination of extract macro operators. ???

-Gagi

haddock

Hi there,

Try this...


<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.0">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.0.0" expanded="true" name="Process">
    <process expanded="true" height="632" width="1044">
      <operator activated="true" class="loop_files" compatibility="5.0.0" expanded="true" height="76" name="Loop Files" width="90" x="108" y="92">
        <parameter key="directory" value="C:\Documents and Settings\Alien\My Documents\rm_workspace"/>
        <parameter key="filter" value=".*csv"/>
        <parameter key="iterate_over_subdirs" value="true"/>
        <process expanded="true" height="296" width="705">
          <operator activated="true" class="set_macro" compatibility="5.0.8" expanded="true" height="76" name="Set Macro" width="90" x="26" y="28">
            <parameter key="macro" value="iteration"/>
            <parameter key="value" value="%{a}"/>
          </operator>
          <operator activated="true" class="provide_macro_as_log_value" compatibility="5.0.8" expanded="true" height="76" name="Provide Macro as Log Value" width="90" x="179" y="30">
            <parameter key="macro_name" value="file_path"/>
          </operator>
          <operator activated="true" class="provide_macro_as_log_value" compatibility="5.0.8" expanded="true" height="76" name="Provide Macro as Log Value (2)" width="90" x="313" y="30">
            <parameter key="macro_name" value="file_name"/>
          </operator>
          <operator activated="true" class="provide_macro_as_log_value" compatibility="5.0.8" expanded="true" height="76" name="Provide Macro as Log Value (3)" width="90" x="447" y="30">
            <parameter key="macro_name" value="iteration"/>
          </operator>
          <operator activated="true" class="log" compatibility="5.0.8" expanded="true" height="76" name="Log" width="90" x="585" y="30">
            <list key="log">
              <parameter key="path" value="operator.Provide Macro as Log Value.value.macro_value"/>
              <parameter key="name" value="operator.Provide Macro as Log Value (2).value.macro_value"/>
              <parameter key="iteration" value="operator.Provide Macro as Log Value (3).value.macro_value"/>
            </list>
          </operator>
          <connect from_port="in 1" to_op="Set Macro" to_port="through 1"/>
          <connect from_op="Set Macro" from_port="through 1" to_op="Provide Macro as Log Value" to_port="through 1"/>
          <connect from_op="Provide Macro as Log Value" from_port="through 1" to_op="Provide Macro as Log Value (2)" to_port="through 1"/>
          <connect from_op="Provide Macro as Log Value (2)" from_port="through 1" to_op="Provide Macro as Log Value (3)" to_port="through 1"/>
          <connect from_op="Provide Macro as Log Value (3)" from_port="through 1" to_op="Log" to_port="through 1"/>
          <portSpacing port="source_in 1" spacing="0"/>
          <portSpacing port="source_in 2" spacing="0"/>
        </process>
      </operator>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
    </process>
  </operator>
</process>

dragoljub

I knew I had seen that apply count macro somewhere before. Turns out its Page 50 RM 4.5 Manual!

Thanks again! I solved the problem by making my own count macro and incrementing in the loop

your process is just a bit less cumbersome. ;D

I did notice that it would not iterate through my files without another operator in the loop_files such as read csv. I wonder why it does not log anything with the process as it is?

Thanks,
-Gagi