ref

The ref function is used to access a single List element. Assuming there are n elements in a List, the elements of the List are accessed as elements 0 thru n-1. Also the special attributes of Value: and Pair: are supported. The Value index always returns the Pair itself. The Pair index always return true.

(ref list index)

Here are a number of links to Lambda coding examples which contain this instruction in various use cases.

Example_List_ref_028

This example uses the ref function to access a List element using its index.

This example uses the shorthand form of a List reference, the [ ] operators:

Here are the links to the data types of the function arguments.

Here are also a number of links to functions having arguments with any of these data types.

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