yq/pkg/yqlib/doc/operators/length.md

Length

Returns the lengths of the nodes. Length is defined according to the type of the node.

String length

returns length of string

Given a sample.yml file of:

{a: cat}

then

yq '.a | length' sample.yml

will output

3

null length

Given a sample.yml file of:

{a: null}

then

yq '.a | length' sample.yml

will output

0

Map length

returns number of entries

Given a sample.yml file of:

{a: cat, c: dog}

then

yq 'length' sample.yml

will output

2

Array length

returns number of elements

Given a sample.yml file of:

[2, 4, 6, 8]

then

yq 'length' sample.yml

will output

4