How to use macro within a regular expression

KanikaAg15

Hi, I have a macro whose value is used across multiple operators. I want to use the same macro within a regular expression. Can any one give an example how to use the same.

jwpfau

Hi,

you can build your regex with a real value and replace it afterwards with %{macroname} inside the Parameters panel.

<?xml version="1.0" encoding="UTF-8"?><process version="10.1.002">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="10.1.002" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <process expanded="true">
      <operator activated="true" class="utility:create_exampleset" compatibility="10.1.002" expanded="true" height="68" name="Create ExampleSet" width="90" x="179" y="34">
        <parameter key="generator_type" value="attribute functions"/>
        <parameter key="number_of_examples" value="1"/>
        <parameter key="use_stepsize" value="false"/>
        <list key="function_descriptions">
          <parameter key="data" value="&quot;Apr 24, 2022-Apr 30, 2022+Delay,Apr 24, 2022-Apr 30, 2022+Early,May 16, 2022-May 30, 2022+Delay,Jan 01, 2022-Jan 30, 2022+Early,Jun 26, 2022-Jun 30, 2022+NA&quot;"/>
        </list>
        <parameter key="add_id_attribute" value="false"/>
        <list key="numeric_series_configuration"/>
        <list key="date_series_configuration"/>
        <list key="date_series_configuration (interval)"/>
        <parameter key="date_format" value="yyyy-MM-dd HH:mm:ss"/>
        <parameter key="time_zone" value="SYSTEM"/>
        <parameter key="column_separator" value=","/>
        <parameter key="parse_all_as_nominal" value="false"/>
        <parameter key="decimal_point_character" value="."/>
        <parameter key="trim_attribute_names" value="true"/>
      </operator>
      <operator activated="true" class="set_macro" compatibility="10.1.002" expanded="true" height="82" name="Set Macro" width="90" x="380" y="34">
        <parameter key="macro" value="field"/>
        <parameter key="value" value="Delay"/>
      </operator>
      <operator activated="true" class="replace" compatibility="10.1.002" expanded="true" height="82" name="Replace" width="90" x="581" y="34">
        <parameter key="attribute_filter_type" value="all"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="nominal"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="file_path"/>
        <parameter key="block_type" value="single_value"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="single_value"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
        <parameter key="replace_what" value="([^+^,]+,)+[^+^,]+\+(?!%{field})[^,]+,?|(\+%{field},(?!.*\+%{field}))|\+%{field}"/>
        <parameter key="replace_by" value=""/>
      </operator>
      <connect from_op="Create ExampleSet" from_port="output" to_op="Set Macro" to_port="through 1"/>
      <connect from_op="Set Macro" from_port="through 1" to_op="Replace" to_port="example set input"/>
      <connect from_op="Replace" from_port="example set output" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

The Edit Regular Expression dialog won't work anymore, but the macro will be replaced at runtime.

Greetings,
Jonas