Prepend To List (prepend)

Add data to the start of an array

Description

prepend a data to the start of an array.

Usage

<stdin> -> prepend: value -> <stdout>

Examples

» a [January..December] -> prepend: 'New Year'
New Year
January
February
March
April
May
June
July
August
September
October
November
December

Detail

prepend and append are data type aware:

» tout json [1,2,3] -> append 4 5 6 bob
Error in `append` (1,22): cannot convert 'bob' to a floating point number: strconv.ParseFloat: parsing "bob": invalid syntax

Synonyms

See Also


This document was generated from builtins/core/lists/append_doc.yaml.

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Last built on Wed Jul 2 22:12:32 UTC 2025 against commit bb72b6fbb72b6fdd502f835172d7d06207ba4ec2c70886c.

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