range.md

Filter By Range [ ..Range ]

Outputs a ranged subset of data from stdin

Description

This will read from stdin and output a subset of data in a defined range.

The range can be defined as a number of different range types - such as the content of the array or it's index / row number. You can also omit either the start or the end of the search criteria to cover all items before or after the remaining search criteria.

Please note that @[ syntax has been deprecated in favour of [ syntax instead

Usage

<stdin> -> [start..end]flags -> <stdout>

Examples

Include everything after string match:

» a [January..December] -> [March..]se
April
May
June
July
August
September
October
November
December

Range from the 6th to the 10th index

By default, ranges start from one, 1:

» a [January..December] -> [5..9]
May
June
July
August
September

Return the first 3

This usage is similar to head -n3:

» a [January..December] -> [..3]
October
November
December

Return the last 3

This usage is similar to tail -n3:

» a [January..December] -> [-3..]
October
November
December

Flags

• 8 handles backspace characters (char 8) instead of treating it like a printable character
• b removes blank (empty) lines from source
• e exclude the start and end search criteria from the range
• n numeric offset (indexed from 0)
• r regexp match
• s exact string match
• t trims whitespace from source

Synonyms

• @[

See Also

• Alter Data Structure (alter / ~>): Change a value within a structured data-type and pass that change along the pipeline without altering the original source input
• Append To List (append): Add data to the end of an array
• Count (count): Count items in a map, list or array
• Create JSON Array (ja): A sophisticated yet simply way to build a JSON array
• Get Item ([ Index ]): Outputs an element from an array, map or table
• Get Nested Element ([[ Element ]]): Outputs an element from a nested structure
• Prepend To List (prepend): Add data to the start of an array
• Split String (jsplit): Splits stdin into a JSON array based on a regex parameter
• Stream New List (a): A sophisticated yet simple way to stream an array or list (mkarray)

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This document was generated from builtins/core/ranges/ranges_doc.yaml.