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split node - add comment to info re $N being number of messages arriving
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</ul>
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</dd>
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<dt class="optional">complete</dt>
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<dd>If set, the node will append the payload, and then send the output message in its current state.
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<dd>If set, the node will append the payload, and then send the output message in its current state.
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If you don't wish to append the payload, delete it from the msg.</dd>
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</dl>
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<h3>Details</h3>
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<p>By default, the reduce expression is applied in order, from the first
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to the last message of the sequence. It can optionally be applied in
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reverse order.</p>
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<p>$N is the number of messages that arrive - even if they are identical.</p>
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</dl>
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<p><b>Example:</b> the following settings, given a sequence of numeric values,
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calculates the average value:
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