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49 lines
542 B
Markdown
49 lines
542 B
Markdown
This is operation that returns true if the key exists in a map (or index in an array), false otherwise.
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## Has map key
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Given a sample.yml file of:
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```yaml
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- a: "yes"
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'': null
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- a: ~
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'': null
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- a:
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'': null
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- b: nope
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'': null
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```
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then
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```bash
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yq eval '.[] | has("a")' sample.yml
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```
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will output
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```yaml
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true
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true
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true
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false
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```
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## Has array index
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Given a sample.yml file of:
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```yaml
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- []
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- [1]
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- [1, 2]
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- [1, null]
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- [1, 2, 3]
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```
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then
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```bash
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yq eval '.[] | has(1)' sample.yml
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```
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will output
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```yaml
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false
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false
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true
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true
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true
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```
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