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@@ -16,213 +16,3 @@ These are most commonly used with the `select` operator to filter particular nod
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- comparison (`>=`, `<` etc) operators [here](https://mikefarah.gitbook.io/yq/operators/compare)
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- select operator [here](https://mikefarah.gitbook.io/yq/operators/select)
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## `or` example
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Running
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```bash
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yq --null-input 'true or false'
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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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## `and` example
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Running
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```bash
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yq --null-input 'true and false'
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```
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will output
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```yaml
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false
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```
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## Matching nodes with select, equals and or
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Given a sample.yml file of:
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```yaml
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- a: bird
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b: dog
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- a: frog
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b: bird
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- a: cat
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b: fly
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```
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then
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```bash
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yq '[.[] | select(.a == "cat" or .b == "dog")]' sample.yml
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```
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will output
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```yaml
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- a: bird
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b: dog
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- a: cat
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b: fly
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```
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## `any` returns true if any boolean in a given array is true
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Given a sample.yml file of:
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```yaml
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- false
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- true
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```
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then
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```bash
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yq 'any' 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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```
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## `any` returns false for an empty array
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Given a sample.yml file of:
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```yaml
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[]
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```
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then
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```bash
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yq 'any' 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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```
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## `any_c` returns true if any element in the array is true for the given condition.
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Given a sample.yml file of:
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```yaml
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a:
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- rad
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- awesome
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b:
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- meh
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- whatever
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```
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then
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```bash
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yq '.[] |= any_c(. == "awesome")' sample.yml
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```
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will output
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```yaml
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a: true
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b: false
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```
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## `all` returns true if all booleans in a given array are true
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Given a sample.yml file of:
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```yaml
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- true
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- true
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```
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then
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```bash
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yq 'all' 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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```
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## `all` returns true for an empty array
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Given a sample.yml file of:
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```yaml
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[]
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```
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then
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```bash
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yq 'all' 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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```
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## `all_c` returns true if all elements in the array are true for the given condition.
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Given a sample.yml file of:
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```yaml
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a:
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- rad
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- awesome
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b:
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- meh
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- 12
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```
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then
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```bash
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yq '.[] |= all_c(tag == "!!str")' sample.yml
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```
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will output
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```yaml
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a: true
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b: false
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```
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## Not true is false
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Running
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```bash
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yq --null-input 'true | not'
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```
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will output
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```yaml
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false
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```
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## Not false is true
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Running
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```bash
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yq --null-input 'false | not'
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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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## String values considered to be true
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Running
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```bash
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yq --null-input '"cat" | not'
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```
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will output
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```yaml
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false
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```
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## Empty string value considered to be true
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Running
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```bash
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yq --null-input '"" | not'
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```
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will output
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```yaml
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false
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```
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## Numbers are considered to be true
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Running
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```bash
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yq --null-input '1 | not'
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```
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will output
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```yaml
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false
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```
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## Zero is considered to be true
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Running
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```bash
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yq --null-input '0 | not'
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```
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will output
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```yaml
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false
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```
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## Null is considered to be false
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Running
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```bash
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yq --null-input '~ | not'
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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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