yq
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  • yq
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On this page
  • Related Operators
  • Match string
  • Don't match string
  • Match number
  • Don't match number
  • Match nulls
  • Non existent key doesn't equal a value
  • Two non existent keys are equal

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  1. Operators

Equals

PreviousEnv Variable OperatorsNextEval

Last updated 2 years ago

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This is a boolean operator that will return true if the LHS is equal to the RHS and false otherwise.

.a == .b

It is most often used with the select operator to find particular nodes:

select(.a == .b)

The not equals != operator returns false if the LHS is equal to the RHS.

Related Operators

  • comparison (>=, < etc) operators

  • boolean operators (and, or, any etc)

  • select operator

Match string

Given a sample.yml file of:

- cat
- goat
- dog

then

yq '.[] | (. == "*at")' sample.yml

will output

true
true
false

Don't match string

Given a sample.yml file of:

- cat
- goat
- dog

then

yq '.[] | (. != "*at")' sample.yml

will output

false
false
true

Match number

Given a sample.yml file of:

- 3
- 4
- 5

then

yq '.[] | (. == 4)' sample.yml

will output

false
true
false

Don't match number

Given a sample.yml file of:

- 3
- 4
- 5

then

yq '.[] | (. != 4)' sample.yml

will output

true
false
true

Match nulls

Running

yq --null-input 'null == ~'

will output

true

Non existent key doesn't equal a value

Given a sample.yml file of:

a: frog

then

yq 'select(.b != "thing")' sample.yml

will output

a: frog

Two non existent keys are equal

Given a sample.yml file of:

a: frog

then

yq 'select(.b == .c)' sample.yml

will output

a: frog
here
here
here