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39 lines
660 B
Markdown
39 lines
660 B
Markdown
# Group By
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This is used to group items in an array by an expression.
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## Group by field
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Given a sample.yml file of:
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```yaml
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[{foo: 1, bar: 10}, {foo: 3, bar: 100}, {foo: 1, bar: 1}]
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```
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then
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```bash
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yq 'group_by(.foo)' sample.yml
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```
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will output
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```yaml
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- - {foo: 1, bar: 10}
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- {foo: 1, bar: 1}
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- - {foo: 3, bar: 100}
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```
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## Group by field, with nuls
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Given a sample.yml file of:
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```yaml
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[{cat: dog}, {foo: 1, bar: 10}, {foo: 3, bar: 100}, {no: foo for you}, {foo: 1, bar: 1}]
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```
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then
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```bash
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yq 'group_by(.foo)' sample.yml
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```
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will output
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```yaml
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- - {cat: dog}
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- {no: foo for you}
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- - {foo: 1, bar: 10}
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- {foo: 1, bar: 1}
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- - {foo: 3, bar: 100}
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```
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