mirror of https://github.com/mikefarah/yq.git
96 lines
1012 B
Markdown
96 lines
1012 B
Markdown
This is a boolean operator that will return ```true``` if the LHS is equal to the RHS and ``false`` otherwise.
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```
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.a == .b
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```
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It is most often used with the select operator to find particular nodes:
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```
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select(.a == .b)
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```
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## Match string
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Given a sample.yml file of:
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```yaml
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- cat
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- goat
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- dog
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```
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then
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```bash
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yq eval '.[] | (. == "*at")' 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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false
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```
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## Don't match string
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Given a sample.yml file of:
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```yaml
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- cat
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- goat
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- dog
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```
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then
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```bash
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yq eval '.[] | (. != "*at")' 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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```
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## Match number
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Given a sample.yml file of:
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```yaml
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- 3
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- 4
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- 5
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```
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then
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```bash
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yq eval '.[] | (. == 4)' 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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true
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false
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```
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## Dont match number
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Given a sample.yml file of:
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```yaml
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- 3
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- 4
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- 5
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```
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then
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```bash
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yq eval '.[] | (. != 4)' 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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false
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true
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```
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## Match nulls
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Running
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```bash
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yq eval --null-input 'null == ~'
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```
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will output
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```yaml
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true
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```
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