fa6fac1a76
* Remove extra backtick * Reword explanation of update * Reword explanation of relative update * Change "remaple" to "remain" * Change "clovver" to "clobber" * Reword explanation of update for comment operators * Reword explanation of relative update for comment operators * Change "array" to "expression" * Change "the golangs" to "Golang's" * Change "golangs" to "Golang's" * Change "can durations" to "can add durations" * Change "array scalars" to "arrays" * Change "beit" to "be it" * Fix typo in `eval` tip * Fix typo in header for `has` operation * Add space before pipe in `line` operator example * Fix typos in explanation of deep array merges * Change "is now used" to "is now used." * Change "object," to "object." * Changes "indexes" to "indices" * Remove extraneous copied text from `..` article * Reword explanation of `...` operator * Change "your are" to "you are" * Add link to `string` operator docs in `select` article * Change "is a" to "parameter specifies" in `string` operators article * Change "new line" to "newline" * Change "golang regex" to "Golang's regex" * Change "golang" to "Golang" * Add period * Remove comma in `subtract` article * Remove duplicate number subtraction example * Remove comma in `traverse` operator article * Clarify use of brackets when `read`ing with special characters
2.5 KiB
Recursive Descent (Glob)
This operator recursively matches (or globs) all children nodes given of a particular element, including that node itself. This is most often used to apply a filter recursively against all matches.
match values form ..
This will, like the jq equivalent, recursively match all value nodes. Use it to find/manipulate particular values.
For instance to set the style of all value nodes in a yaml doc, excluding map keys:
yq '.. style= "flow"' file.yaml
match values and map keys form ...
The also includes map keys in the results set. This is particularly useful in YAML as unlike JSON, map keys can have their own styling and tags and also use anchors and aliases.
For instance to set the style of all nodes in a yaml doc, including the map keys:
yq '... style= "flow"' file.yaml
Recurse map (values only)
Given a sample.yml file of:
a: frog
then
yq '..' sample.yml
will output
a: frog
frog
Recursively find nodes with keys
Note that this example has wrapped the expression in [] to show that there are two matches returned. You do not have to wrap in [] in your path expression.
Given a sample.yml file of:
a:
name: frog
b:
name: blog
age: 12
then
yq '[.. | select(has("name"))]' sample.yml
will output
- name: frog
b:
name: blog
age: 12
- name: blog
age: 12
Recursively find nodes with values
Given a sample.yml file of:
a:
nameA: frog
b:
nameB: frog
age: 12
then
yq '.. | select(. == "frog")' sample.yml
will output
frog
frog
Recurse map (values and keys)
Note that the map key appears in the results
Given a sample.yml file of:
a: frog
then
yq '...' sample.yml
will output
a: frog
a
frog
Aliases are not traversed
Given a sample.yml file of:
a: &cat
c: frog
b: *cat
then
yq '[..]' sample.yml
will output
- a: &cat
c: frog
b: *cat
- &cat
c: frog
- frog
- *cat
Merge docs are not traversed
Given a sample.yml file of:
foo: &foo
a: foo_a
thing: foo_thing
c: foo_c
bar: &bar
b: bar_b
thing: bar_thing
c: bar_c
foobarList:
b: foobarList_b
!!merge <<:
- *foo
- *bar
c: foobarList_c
foobar:
c: foobar_c
!!merge <<: *foo
thing: foobar_thing
then
yq '.foobar | [..]' sample.yml
will output
- c: foobar_c
!!merge <<: *foo
thing: foobar_thing
- foobar_c
- *foo
- foobar_thing