Filter array elements

Supported in: Batch, Streaming

Filters an array based on the filter expression. Note, array index starts at 1.

Expression categories: Array

Declared arguments

• Array: Array to be filtered.
  Expression<Array<T>>
• Expression to filter: If the expression evaluates to true for a given element, the element will be kept, if false the element will be removed.
  Expression<Boolean>

Type variable bounds: T accepts AnyType

Output type: Array<T>

Examples

Example 1: Base case

Argument values:

• Array: array
• Expression to filter:
  isNotNull(
   expression: element,
  )

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Example 2: Base case

Argument values:

• Array: array
• Expression to filter:
  lessThanOrEquals(
   left: element,
   right: 10,
  )

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Example 3: Base case

Argument values:

• Array: array
• Expression to filter:
  lessThanOrEquals(
   left: element,
   right: 10,
  )

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Example 4: Base case

Description: Note that array index starts at 1. Argument values:

• Array: array
• Expression to filter:
  equals(
   left: element,
   right: elementIndex,
  )

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Example 5: Base case

Argument values:

• Array: array
• Expression to filter:
  stringContains(
   expression: element,
   ignoreCase: false,
   value: hello,
  )

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Example 6: Base case

Argument values:

• Array: array
• Expression to filter:
  lessThanOrEquals(
   left:
  add(
   expressions: [element, 4],
  ),
   right: 10,
  )

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Example 7: Null case

Argument values:

• Array: array
• Expression to filter:
  lessThanOrEquals(
   left: element,
   right: 10,
  )

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