Transform array element

Supported in: Batch, Streaming

Maps each element of an array using an expression. Note, array index starts at 1.

Expression categories: Array

Declared arguments

• Array: Input array containing elements to apply the expression over.
  Expression<Array<AnyType>>
• Expression to apply: The expression to apply once per element of the array.
  Expression<T>

Type variable bounds: T accepts AnyType

Output type: Array<T>

Examples

Example 1: Base case

Argument values:

• Array: flight_number
• Expression to apply:
  stringBeforeDelimiter(
   delimiter: -,
   expression: element,
   ignoreCase: false,
  )

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Example 2: Base case

Argument values:

• Array: miles
• Expression to apply:
  add(
   expressions: [previous_miles, element],
  )

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Example 3: Base case

Description: Add the index to the array element. Note the index starts at 1. Argument values:

• Array: array
• Expression to apply:
  add(
   expressions: [elementIndex, element],
  )

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Example 4: Base case

Argument values:

• Array: miles
• Expression to apply:
  cast(
   expression: element,
   type: String,
  )

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Example 5: Base case

Description: Getting the struct element from an array of structs. Argument values:

• Array: raw_data
• Expression to apply:
  getStructField(
   locator: miles,
   struct: element,
  )

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Example 6: Base case

Description: Getting the struct element from an array of structs. Argument values:

• Array: raw_data
• Expression to apply:
  transformMapKeys(
   expression:
  uppercase(
   expression: key,
  ),
   map: element,
  )

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