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Group By
This is used to group items in an array by an expression.
Note that versions prior to 4.18 require the 'eval/e' command to be specified.
yq e <exp> <file>

Group by field

Given a sample.yml file of:
- foo: 1
bar: 10
- foo: 3
bar: 100
- foo: 1
bar: 1
then
yq 'group_by(.foo)' sample.yml
will output
- - foo: 1
bar: 10
- foo: 1
bar: 1
- - foo: 3
bar: 100

Group by field, with nuls

Given a sample.yml file of:
- cat: dog
- foo: 1
bar: 10
- foo: 3
bar: 100
- no: foo for you
- foo: 1
bar: 1
then
yq 'group_by(.foo)' sample.yml
will output
- - cat: dog
- no: foo for you
- - foo: 1
bar: 10
- foo: 1
bar: 1
- - foo: 3
bar: 100
Last modified 7mo ago
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Group by field
Group by field, with nuls