Nesting Operators

Ductape Operators can be nested to perform complex transformations in a single expression.

Examples of Nested Operators:

1. Nested $Add with $Substring and $Pick:

$Add( $Pick('12345', 0), $Substring('98765', 2, 4) )

• $Pick('12345', 0) → '1' → 1
• $Substring('98765', 2, 4) → '76' → 76
• $Add(1, 76) → 77

2. Nested $Concat with $Trim and $Split:

$Concat([$Trim('  hello  '), $Pick($Split('a,b,c', ','), 1)], '-')

• $Trim(' hello ') → 'hello'
• $Split('a,b,c', ',') → ['a', 'b', 'c']
• $Pick(['a', 'b', 'c'], 1) → 'b'
• $Concat(['hello', 'b'], '-') → 'hello-b'

3. Nested $Subtract with $Add and $Pick:

$Subtract( $Add(2, 3), $Pick('678', 1) )

• $Add(2, 3) → 5
• $Pick('678', 1) → '7' → 7
• $Subtract(5, 7) → -2

4. Complex Nesting with $Join, $Split, and $Trim:

$Join([$Trim(' John '), $Pick($Split('Jane,Doe', ','), 1)], ' & ')

• $Trim(' John ') → 'John'
• $Split('Jane,Doe', ',') → ['Jane', 'Doe']
• $Pick(['Jane', 'Doe'], 1) → 'Doe'
• $Join(['John', 'Doe'], ' & ') → 'John & Doe'

5. Deep Nesting Example:

$Concat([
  $Add( $Pick('12', 0), 5 ),
  $Substring('abcdef', 2, 5),
  $Trim(' xyz ')
], '_')

• $Pick('12', 0) → '1' → 1
• $Add(1, 5) → 6
• $Substring('abcdef', 2, 5) → 'cde'
• $Trim(' xyz ') → 'xyz'
• $Concat(['6', 'cde', 'xyz'], '_') → '6_cde_xyz'

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✅ Tip: Nesting operators enables powerful data transformations in a concise format. Make sure to validate data types to avoid runtime errors.