String.Replace

[sumiya-kuroda]

Hi.

I have a String in my workflow which looks like "2025-07-26". I want to remove the dash from this string by replacing - with nothing. What is easiest way to achieve this operation in Bonsai?

[bruno-f-cruz]

Use ExpressionTransform with it.Replace(old_char, new_char)

<?xml version="1.0" encoding="utf-8"?>
<WorkflowBuilder Version="2.9.0"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xmlns:scr="clr-namespace:Bonsai.Scripting.Expressions;assembly=Bonsai.Scripting.Expressions"
                 xmlns="https://bonsai-rx.org/2018/workflow">
  <Workflow>
    <Nodes>
      <Expression xsi:type="Combinator">
        <Combinator xsi:type="StringProperty">
          <Value>Foo</Value>
        </Combinator>
      </Expression>
      <Expression xsi:type="scr:ExpressionTransform">
        <scr:Expression>it.Replace("o", "a")</scr:Expression>
      </Expression>
    </Nodes>
    <Edges>
      <Edge From="0" To="1" Label="Source1" />
    </Edges>
  </Workflow>
</WorkflowBuilder>

[sumiya-kuroda]

Beautiful! Thanks so much!