Slice Block Screenshot

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Overview

The Slice Block extracts a portion of an array. It takes an array as input and outputs a new array that starts at a specified index and contains a specified number of elements. This block is useful for manipulating arrays, such as extracting a subset of data from a larger dataset.

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Key Features

  • Extract a subset of elements from an array
  • Configurable start index and count
  • Option to provide start and count values via input ports
  • Handles empty/undefined inputs gracefully

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Inputs

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input
any[]
required
The array to be sliced.
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start
number
The index at which to start the slice. Only available when “Use Start Input” is enabled.
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count
number
The number of elements to include in the slice. Only available when “Use Count Input” is enabled.

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Outputs

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output
any[]
The sliced array containing the extracted elements from the input array.

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Editor Settings

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start
number
default:0
The index at which to start the slice. If not provided, defaults to 0.
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count
number
The number of elements to include in the slice. If not provided, includes all elements from start to end.
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useStartInput
boolean
default:false
When enabled, allows the start index to be provided via an input port instead of being set in the settings.
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useCountInput
boolean
default:false
When enabled, allows the count to be provided via an input port instead of being set in the settings.

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Example: Slice an array

  1. Create an Array Block with values [1, 2, 3, 4, 5].
  2. Add a Slice Block and set the Start to 2 and the Count to 2.
  3. Connect the Array Block to the Slice Block’s input.
  4. Run the flow. The Slice Block’s output should be [3, 4].

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Error Handling

  • The block will error if the input is not provided or is not an array
  • If start or count inputs are enabled but not connected, the block will use the default values
  • Using a negative count will result in an error

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FAQ

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See Also