first

For filters.

Return only the first several rows of the input. Counterpart of `last`. Opposite of `skip`. For binary input, rows can also be specified as a filesize.

Command Type

built-in

Signature

> first {flags} (rows)

Flags

--strict, -s: Throw an error if input is empty.

Parameters

rows: Starting from the front, the number of rows to return.

Input/output types:

input	output
list<any>	any
binary	binary
range	any

Examples

Return the first item of a list/table.

> [1 2 3] | first
1

Return the first 2 items of a list/table.

> [1 2 3] | first 2
╭───┬───╮
│ 0 │ 1 │
│ 1 │ 2 │
╰───┴───╯

Return the first 2 bytes of a binary value.

> 0x[01 23 45] | first 2
Length: 2 (0x2) bytes | null_char printable whitespace ascii_other non_ascii
00000000:   01 23                                                •#

Return the first item of a range.

> 1..3 | first
1

Return the first 2 bytes of a binary value, using a filesize argument.

> 0x[01 23 45] | first 2b
Length: 2 (0x2) bytes | null_char printable whitespace ascii_other non_ascii
00000000:   01 23                                                •#

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