yq/pkg/yqlib/doc/Mulitply Operator.md

Mulitply Operator

Examples

Merge objects together

sample.yml:

{a: {also: me}, b: {also: {g: wizz}}}

Expression

yq '. * {"a":.b}' < sample.yml

Result

{a: {also: {g: wizz}}, b: {also: {g: wizz}}}

Merge keeps style of LHS

sample.yml:

a: {things: great}
b:
  also: "me"

Expression

yq '. * {"a":.b}' < sample.yml

Result

a: {things: great, also: "me"}
b:
  also: "me"

Merge arrays

sample.yml:

{a: [1,2,3], b: [3,4,5]}

Expression

yq '. * {"a":.b}' < sample.yml

Result

{a: [3, 4, 5], b: [3, 4, 5]}

Merge to prefix an element

sample.yml:

{a: cat, b: dog}

Expression

yq '. * {"a": {"c": .a}}' < sample.yml

Result

{a: {c: cat}, b: dog}

Merge with simple aliases

sample.yml:

{a: &cat {c: frog}, b: {f: *cat}, c: {g: thongs}}

Expression

yq '.c * .b' < sample.yml

Result

{g: thongs, f: *cat}

Merge does not copy anchor names

sample.yml:

{a: {c: &cat frog}, b: {f: *cat}, c: {g: thongs}}

Expression

yq '.c * .a' < sample.yml

Result

{g: thongs, c: frog}

Merge with merge anchors

sample.yml:

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
  <<: [*foo,*bar]
  c: foobarList_c

foobar:
  c: foobar_c
  <<: *foo
  thing: foobar_thing

Expression

yq '.foobar * .foobarList' < sample.yml

Result

c: foobarList_c
<<: [*foo, *bar]
thing: foobar_thing
b: foobarList_b