Added CSV roundtrip

acceptance_tests/inputs-format.sh

@@ -3,6 +3,8 @@
 setUp() {
   rm test*.yml 2>/dev/null || true
   rm test*.properties 2>/dev/null || true
+  rm test*.csv 2>/dev/null || true
+  rm test*.tsv 2>/dev/null || true
   rm test*.xml 2>/dev/null || true
 }
 
@@ -40,6 +42,51 @@ EOM
   assertEquals "$expected" "$X"
 }
 
+testInputCSV() {
+  cat >test.csv <<EOL
+fruit,yumLevel
+apple,5
+banana,4
+EOL
+
+  read -r -d '' expected << EOM
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOM
+
+  X=$(./yq e -p=csv test.csv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=csv test.csv)
+  assertEquals "$expected" "$X"
+}
+
+testInputTSV() {
+  cat >test.tsv <<EOL
+fruit	yumLevel
+apple	5
+banana	4
+EOL
+
+  read -r -d '' expected << EOM
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOM
+
+  X=$(./yq e -p=t test.tsv)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -p=t test.tsv)
+  assertEquals "$expected" "$X"
+}
+
+
+
+
 testInputXml() {
   cat >test.yml <<EOL
 <cat legs="4">BiBi</cat>

acceptance_tests/output-format.sh

@@ -102,6 +102,48 @@ EOM
   assertEquals "$expected" "$X"
 }
 
+testOutputCSV() {
+  cat >test.yml <<EOL
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOL
+
+  read -r -d '' expected << EOM
+fruit,yumLevel
+apple,5
+banana,4
+EOM
+
+  X=$(./yq -o=c test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=csv test.yml)
+  assertEquals "$expected" "$X"
+}
+
+testOutputTSV() {
+  cat >test.yml <<EOL
+- fruit: apple
+  yumLevel: 5
+- fruit: banana
+  yumLevel: 4
+EOL
+
+  read -r -d '' expected << EOM
+fruit	yumLevel
+apple	5
+banana	4
+EOM
+
+  X=$(./yq -o=t test.yml)
+  assertEquals "$expected" "$X"
+
+  X=$(./yq ea -o=tsv test.yml)
+  assertEquals "$expected" "$X"
+}
+
 testOutputXml() {
   cat >test.yml <<EOL
 a: {b: {c: ["cat"]}}

pkg/yqlib/csv_test.go

@@ -13,6 +13,11 @@ Gary,1,true,168.8
 Samantha's Rabbit,2,false,-188.8
 `
 
+const expectedUpdatedSimpleCsv = `name,numberOfCats,likesApples,height
+Gary,3,true,168.8
+Samantha's Rabbit,2,false,-188.8
+`
+
 const csvSimpleShort = `Name,Number of Cats
 Gary,1
 Samantha's Rabbit,2
@@ -33,10 +38,23 @@ const expectedYamlFromCSV = `- name: Gary
   height: -188.8
 `
 
+const expectedYamlFromCSVMissingData = `- name: Gary
+  numberOfCats: 1
+  height: 168.8
+- name: Samantha's Rabbit
+  height: -188.8
+  likesApples: false
+`
+
+const csvSimpleMissingData = `name,numberOfCats,height
+Gary,1,168.8
+Samantha's Rabbit,,-188.8
+`
+
 const csvTestSimpleYaml = `- [i, like, csv]
 - [because, excel, is, cool]`
 
-const csvTestExpectedSimpleCsv = `i,like,csv
+const expectedSimpleCsv = `i,like,csv
 because,excel,is,cool
 `
 
@@ -48,7 +66,7 @@ var csvScenarios = []formatScenario{
 	{
 		description:  "Encode CSV simple",
 		input:        csvTestSimpleYaml,
-		expected:     csvTestExpectedSimpleCsv,
+		expected:     expectedSimpleCsv,
 		scenarioType: "encode-csv",
 	},
 	{
@@ -57,20 +75,39 @@ var csvScenarios = []formatScenario{
 		expected:     tsvTestExpectedSimpleCsv,
 		scenarioType: "encode-tsv",
 	},
+	{
+		description:  "Encode Empty",
+		skipDoc:      true,
+		input:        `[]`,
+		expected:     "",
+		scenarioType: "encode-csv",
+	},
+	{
+		description:  "Comma in value",
+		skipDoc:      true,
+		input:        `["comma, in, value", things]`,
+		expected:     "\"comma, in, value\",things\n",
+		scenarioType: "encode-csv",
+	},
 	{
 		description:  "Encode array of objects to csv",
-		subdescription: "Add the header row manually, then the we convert each object into an array of values - resulting in an array of arrays. Nice thing about this method is you can pick the columns and call the header whatever you like.",
+		input:        expectedYamlFromCSV,
+		expected:     csvSimple,
+		scenarioType: "encode-csv",
+	},
+	{
+		description:    "Encode array of objects to custom csv format",
+		subdescription: "Add the header row manually, then the we convert each object into an array of values - resulting in an array of arrays. Pick the columns and call the header whatever you like.",
 		input:          expectedYamlFromCSV,
 		expected:       csvSimpleShort,
 		expression:     `[["Name", "Number of Cats"]] +  [.[] | [.name, .numberOfCats ]]`,
 		scenarioType:   "encode-csv",
 	},
 	{
-		description:    "Encode array of objects to csv - generic",
-		subdescription: "This is a little trickier than the previous example - we dynamically work out the $header, and use that to automatically create the value arrays.",
-		input:          expectedYamlFromCSV,
-		expected:       csvSimple,
-		expression:     `(.[0] | keys | .[] ) as $header |  [[$header]] +  [.[] | [ .[$header] ]]`,
+		description:    "Encode array of objects to csv - missing fields behaviour",
+		subdescription: "First entry is used to determine the headers, and it it missing 'likesApples', so it is not included in the csv. Second entry does not have 'numberOfCats' so that is blank",
+		input:          expectedYamlFromCSVMissingData,
+		expected:       csvSimpleMissingData,
 		scenarioType:   "encode-csv",
 	},
 	{
@@ -87,6 +124,13 @@ var csvScenarios = []formatScenario{
 		expected:       expectedYamlFromCSV,
 		scenarioType:   "decode-tsv-object",
 	},
+	{
+		description:  "Round trip",
+		input:        csvSimple,
+		expected:     expectedUpdatedSimpleCsv,
+		expression:   `(.[] | select(.name == "Gary") | .numberOfCats) = 3`,
+		scenarioType: "roundtrip-csv",
+	},
 }
 
 func testCSVScenario(t *testing.T, s formatScenario) {
@@ -99,6 +143,8 @@ func testCSVScenario(t *testing.T, s formatScenario) {
 		test.AssertResultWithContext(t, s.expected, processFormatScenario(s, NewCSVObjectDecoder(','), NewYamlEncoder(2, false, true, true)), s.description)
 	case "decode-tsv-object":
 		test.AssertResultWithContext(t, s.expected, processFormatScenario(s, NewCSVObjectDecoder('\t'), NewYamlEncoder(2, false, true, true)), s.description)
+	case "roundtrip-csv":
+		test.AssertResultWithContext(t, s.expected, processFormatScenario(s, NewCSVObjectDecoder(','), NewCsvEncoder(',')), s.description)
 	default:
 		panic(fmt.Sprintf("unhandled scenario type %q", s.scenarioType))
 	}
@@ -161,6 +207,38 @@ func documentCSVEncodeScenario(w *bufio.Writer, s formatScenario, formatType str
 	)
 }
 
+func documentCSVRoundTripScenario(w *bufio.Writer, s formatScenario, formatType string) {
+	writeOrPanic(w, fmt.Sprintf("## %v\n", s.description))
+
+	if s.subdescription != "" {
+		writeOrPanic(w, s.subdescription)
+		writeOrPanic(w, "\n\n")
+	}
+
+	writeOrPanic(w, fmt.Sprintf("Given a sample.%v file of:\n", formatType))
+	writeOrPanic(w, fmt.Sprintf("```%v\n%v\n```\n", formatType, s.input))
+
+	writeOrPanic(w, "then\n")
+
+	expression := s.expression
+
+	if expression != "" {
+		writeOrPanic(w, fmt.Sprintf("```bash\nyq -p=%v -o=%v '%v' sample.%v\n```\n", formatType, formatType, expression, formatType))
+	} else {
+		writeOrPanic(w, fmt.Sprintf("```bash\nyq -p=%v -o=%v sample.%v\n```\n", formatType, formatType, formatType))
+	}
+	writeOrPanic(w, "will output\n")
+
+	separator := ','
+	if formatType == "tsv" {
+		separator = '\t'
+	}
+
+	writeOrPanic(w, fmt.Sprintf("```%v\n%v```\n\n", formatType,
+		processFormatScenario(s, NewCSVObjectDecoder(separator), NewCsvEncoder(separator))),
+	)
+}
+
 func documentCSVScenario(t *testing.T, w *bufio.Writer, i interface{}) {
 	s := i.(formatScenario)
 	if s.skipDoc {
@@ -175,6 +253,8 @@ func documentCSVScenario(t *testing.T, w *bufio.Writer, i interface{}) {
 		documentCSVDecodeObjectScenario(t, w, s, "csv")
 	case "decode-tsv-object":
 		documentCSVDecodeObjectScenario(t, w, s, "tsv")
+	case "roundtrip-csv":
+		documentCSVRoundTripScenario(w, s, "csv")
 
 	default:
 		panic(fmt.Sprintf("unhandled scenario type %q", s.scenarioType))

pkg/yqlib/doc/operators/encode-decode.md

@@ -11,14 +11,14 @@ These operators are useful to process yaml documents that have stringified embed
 | --- | -- | --|
 | Yaml | from_yaml | to_yaml(i)/@yaml |
 | JSON | from_json | to_json(i)/@json |
-| Properties | from_props  | to_props/@props |
-| CSV |  | to_csv/@csv |
-| TSV |  | to_tsv/@tsv |
+| Properties | from_props/@propsd  | to_props/@props |
+| CSV | from_csv/@csvd | to_csv/@csv |
+| TSV | from_tsv/@tsvd | to_tsv/@tsv |
 | XML | from_xml | to_xml(i)/@xml |
 | Base64 | @base64d | @base64 |
 
 
-CSV and TSV format both accept either a single array or scalars (representing a single row), or an array of array of scalars (representing multiple rows). 
+See CSV and TSV [documentation](https://mikefarah.gitbook.io/yq/usage/csv-tsv) for accepted formats.
 
 XML uses the `--xml-attribute-prefix` and `xml-content-name` flags to identify attributes and content fields.
 
@@ -132,7 +132,7 @@ a: |-
 ```
 then
 ```bash
-yq '.a |= from_props' sample.yml
+yq '.a |= @propsd' sample.yml
 ```
 will output
 ```yaml
@@ -141,6 +141,42 @@ a:
   dogs: cool as well
 ```
 
+## Decode csv encoded string
+Given a sample.yml file of:
+```yaml
+a: |-
+  cats,dogs
+  great,cool as well
+```
+then
+```bash
+yq '.a |= @csvd' sample.yml
+```
+will output
+```yaml
+a:
+  - cats: great
+    dogs: cool as well
+```
+
+## Decode tsv encoded string
+Given a sample.yml file of:
+```yaml
+a: |-
+  cats	dogs
+  great	cool as well
+```
+then
+```bash
+yq '.a |= @tsvd' sample.yml
+```
+will output
+```yaml
+a:
+  - cats: great
+    dogs: cool as well
+```
+
 ## Encode value as yaml string
 Indent defaults to 2
 

pkg/yqlib/doc/operators/headers/encode-decode.md

@@ -11,14 +11,14 @@ These operators are useful to process yaml documents that have stringified embed
 | --- | -- | --|
 | Yaml | from_yaml | to_yaml(i)/@yaml |
 | JSON | from_json | to_json(i)/@json |
-| Properties | from_props  | to_props/@props |
-| CSV |  | to_csv/@csv |
-| TSV |  | to_tsv/@tsv |
+| Properties | from_props/@propsd  | to_props/@props |
+| CSV | from_csv/@csvd | to_csv/@csv |
+| TSV | from_tsv/@tsvd | to_tsv/@tsv |
 | XML | from_xml | to_xml(i)/@xml |
 | Base64 | @base64d | @base64 |
 
 
-CSV and TSV format both accept either a single array or scalars (representing a single row), or an array of array of scalars (representing multiple rows). 
+See CSV and TSV [documentation](https://mikefarah.gitbook.io/yq/usage/csv-tsv) for accepted formats.
 
 XML uses the `--xml-attribute-prefix` and `xml-content-name` flags to identify attributes and content fields.
 

pkg/yqlib/doc/usage/csv-tsv.md

@@ -1,5 +1,32 @@
 # CSV
-Encode (arrays of arrays) data structures to CSV or TSV, Decode CSV, TSV into an array of objects.
+Encode/Decode to CSV or TSV.
+
+## Encode 
+Currently supports arrays of homogenous flat objects, that is: no nesting and it assumes the _first_ object has all the keys required:
+
+```yaml
+- name: Bobo
+  type: dog
+- name: Fifi
+  type: cat
+```
+
+As well as arrays of arrays of scalars (strings/numbers/booleans):
+
+```yaml
+- [Bobo, dog]
+- [Fifi, cat]
+```
+
+## Decode
+Decode assumes the first CSV/TSV row is the header row, and all rows beneath are the entries.
+The data will be coded into an array of objects, using the header rows as keys.
+
+```csv
+name,type
+Bobo,dog
+Fifi,cat
+```
 
 
 {% hint style="warning" %}
@@ -41,7 +68,31 @@ because	excel	is	cool
 ```
 
 ## Encode array of objects to csv
-Add the header row manually, then the we convert each object into an array of values - resulting in an array of arrays. Nice thing about this method is you can pick the columns and call the header whatever you like.
+Given a sample.yml file of:
+```yaml
+- name: Gary
+  numberOfCats: 1
+  likesApples: true
+  height: 168.8
+- name: Samantha's Rabbit
+  numberOfCats: 2
+  likesApples: false
+  height: -188.8
+
+```
+then
+```bash
+yq -o=csv sample.yml
+```
+will output
+```csv
+name,numberOfCats,likesApples,height
+Gary,1,true,168.8
+Samantha's Rabbit,2,false,-188.8
+```
+
+## Encode array of objects to custom csv format
+Add the header row manually, then the we convert each object into an array of values - resulting in an array of arrays. Pick the columns and call the header whatever you like.
 
 Given a sample.yml file of:
 ```yaml
@@ -66,30 +117,28 @@ Gary,1
 Samantha's Rabbit,2
 ```
 
-## Encode array of objects to csv - generic
-This is a little trickier than the previous example - we dynamically work out the $header, and use that to automatically create the value arrays.
+## Encode array of objects to csv - missing fields behaviour
+First entry is used to determine the headers, and it it missing 'likesApples', so it is not included in the csv. Second entry does not have 'numberOfCats' so that is blank
 
 Given a sample.yml file of:
 ```yaml
 - name: Gary
   numberOfCats: 1
-  likesApples: true
   height: 168.8
 - name: Samantha's Rabbit
-  numberOfCats: 2
-  likesApples: false
   height: -188.8
+  likesApples: false
 
 ```
 then
 ```bash
-yq -o=csv '(.[0] | keys | .[] ) as $header |  [[$header]] +  [.[] | [ .[$header] ]]' sample.yml
+yq -o=csv sample.yml
 ```
 will output
 ```csv
-name,numberOfCats,likesApples,height
-Gary,1,true,168.8
-Samantha's Rabbit,2,false,-188.8
+name,numberOfCats,height
+Gary,1,168.8
+Samantha's Rabbit,,-188.8
 ```
 
 ## Parse CSV into an array of objects
@@ -144,3 +193,22 @@ will output
   height: -188.8
 ```
 
+## Round trip
+Given a sample.csv file of:
+```csv
+name,numberOfCats,likesApples,height
+Gary,1,true,168.8
+Samantha's Rabbit,2,false,-188.8
+
+```
+then
+```bash
+yq -p=csv -o=csv '(.[] | select(.name == "Gary") | .numberOfCats) = 3' sample.csv
+```
+will output
+```csv
+name,numberOfCats,likesApples,height
+Gary,3,true,168.8
+Samantha's Rabbit,2,false,-188.8
+```
+

pkg/yqlib/doc/usage/headers/csv-tsv.md

@@ -1,3 +1,30 @@
 # CSV
-Encode (arrays of arrays) data structures to CSV or TSV, Decode CSV, TSV into an array of objects.
+Encode/Decode to CSV or TSV.
+
+## Encode 
+Currently supports arrays of homogenous flat objects, that is: no nesting and it assumes the _first_ object has all the keys required:
+
+```yaml
+- name: Bobo
+  type: dog
+- name: Fifi
+  type: cat
+```
+
+As well as arrays of arrays of scalars (strings/numbers/booleans):
+
+```yaml
+- [Bobo, dog]
+- [Fifi, cat]
+```
+
+## Decode
+Decode assumes the first CSV/TSV row is the header row, and all rows beneath are the entries.
+The data will be coded into an array of objects, using the header rows as keys.
+
+```csv
+name,type
+Bobo,dog
+Fifi,cat
+```
 

pkg/yqlib/encoder_csv.go

@@ -13,7 +13,7 @@ type csvEncoder struct {
 }
 
 func NewCsvEncoder(separator rune) Encoder {
-	return &csvEncoder{separator}
+	return &csvEncoder{separator: separator}
 }
 
 func (e *csvEncoder) CanHandleAliases() bool {
@@ -41,6 +41,67 @@ func (e *csvEncoder) encodeRow(csvWriter *csv.Writer, contents []*yaml.Node) err
 	return csvWriter.Write(stringValues)
 }
 
+func (e *csvEncoder) encodeArrays(csvWriter *csv.Writer, content []*yaml.Node) error {
+	for i, child := range content {
+
+		if child.Kind != yaml.SequenceNode {
+			return fmt.Errorf("csv encoding only works for arrays of scalars (string/numbers/booleans), child[%v] is a %v", i, child.Tag)
+		}
+		err := e.encodeRow(csvWriter, child.Content)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (e *csvEncoder) extractHeader(child *yaml.Node) ([]*yaml.Node, error) {
+	if child.Kind != yaml.MappingNode {
+		return nil, fmt.Errorf("csv object encoding only works for arrays of flat objects (string key => string/numbers/boolean value), child[0] is a %v", child.Tag)
+	}
+	mapKeys := getMapKeys(child)
+	return mapKeys.Content, nil
+}
+
+func (e *csvEncoder) createChildRow(child *yaml.Node, headers []*yaml.Node) []*yaml.Node {
+	childRow := make([]*yaml.Node, 0)
+	for _, header := range headers {
+		keyIndex := findKeyInMap(child, header)
+		value := createScalarNode(nil, "")
+		if keyIndex != -1 {
+			value = child.Content[keyIndex+1]
+		}
+		childRow = append(childRow, value)
+	}
+	return childRow
+
+}
+
+func (e *csvEncoder) encodeObjects(csvWriter *csv.Writer, content []*yaml.Node) error {
+	headers, err := e.extractHeader(content[0])
+	if err != nil {
+		return nil
+	}
+
+	err = e.encodeRow(csvWriter, headers)
+	if err != nil {
+		return nil
+	}
+
+	for i, child := range content {
+		if child.Kind != yaml.MappingNode {
+			return fmt.Errorf("csv object encoding only works for arrays of flat objects (string key => string/numbers/boolean value), child[%v] is a %v", i, child.Tag)
+		}
+		row := e.createChildRow(child, headers)
+		err = e.encodeRow(csvWriter, row)
+		if err != nil {
+			return err
+		}
+
+	}
+	return nil
+}
+
 func (e *csvEncoder) Encode(writer io.Writer, originalNode *yaml.Node) error {
 	csvWriter := csv.NewWriter(writer)
 	csvWriter.Comma = e.separator
@@ -56,15 +117,10 @@ func (e *csvEncoder) Encode(writer io.Writer, originalNode *yaml.Node) error {
 		return e.encodeRow(csvWriter, node.Content)
 	}
 
-	for i, child := range node.Content {
+	if node.Content[0].Kind == yaml.MappingNode {
+		return e.encodeObjects(csvWriter, node.Content)
+	}
+
+	return e.encodeArrays(csvWriter, node.Content)
 
-		if child.Kind != yaml.SequenceNode {
-			return fmt.Errorf("csv encoding only works for arrays of scalars (string/numbers/booleans), child[%v] is a %v", i, child.Tag)
-		}
-		err := e.encodeRow(csvWriter, child.Content)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
 }

pkg/yqlib/encoder_csv_test.go

@@ -1,60 +0,0 @@
-package yqlib
-
-import (
-	"bufio"
-	"bytes"
-	"strings"
-	"testing"
-
-	"github.com/mikefarah/yq/v4/test"
-)
-
-func yamlToCsv(sampleYaml string, separator rune) string {
-	var output bytes.Buffer
-	writer := bufio.NewWriter(&output)
-
-	var jsonEncoder = NewCsvEncoder(separator)
-	inputs, err := readDocuments(strings.NewReader(sampleYaml), "sample.yml", 0, NewYamlDecoder())
-	if err != nil {
-		panic(err)
-	}
-	node := inputs.Front().Value.(*CandidateNode).Node
-	err = jsonEncoder.Encode(writer, node)
-	if err != nil {
-		panic(err)
-	}
-	writer.Flush()
-
-	return strings.TrimSuffix(output.String(), "\n")
-}
-
-var sampleYaml = `["apple", apple2, "comma, in, value", "new
-line", 3, 3.40, true, "tab	here"]`
-
-var sampleYamlArray = "[" + sampleYaml + ", [bob, cat, meow, puss]]"
-
-func TestCsvEncoderEmptyArray(t *testing.T) {
-	var actualCsv = yamlToCsv(`[]`, ',')
-	test.AssertResult(t, "", actualCsv)
-}
-
-func TestCsvEncoder(t *testing.T) {
-	var expectedCsv = `apple,apple2,"comma, in, value",new line,3,3.40,true,tab	here`
-
-	var actualCsv = yamlToCsv(sampleYaml, ',')
-	test.AssertResult(t, expectedCsv, actualCsv)
-}
-
-func TestCsvEncoderArrayOfArrays(t *testing.T) {
-	var actualCsv = yamlToCsv(sampleYamlArray, ',')
-	var expectedCsv = "apple,apple2,\"comma, in, value\",new line,3,3.40,true,tab	here\nbob,cat,meow,puss"
-	test.AssertResult(t, expectedCsv, actualCsv)
-}
-
-func TestTsvEncoder(t *testing.T) {
-
-	var expectedCsv = `apple	apple2	comma, in, value	new line	3	3.40	true	"tab	here"`
-
-	var actualCsv = yamlToCsv(sampleYaml, '\t')
-	test.AssertResult(t, expectedCsv, actualCsv)
-}

pkg/yqlib/lexer_participle.go

@@ -67,7 +67,10 @@ var participleYqRules = []*participleYqRule{
 	{"XMLEncode", `to_?xml`, encodeWithIndent(XMLOutputFormat, 2), 0},
 	{"XMLEncodeNoIndent", `@xml`, encodeWithIndent(XMLOutputFormat, 0), 0},
 
+	{"CSVDecode", `from_?csv|@csvd`, decodeOp(CSVObjectInputFormat), 0},
 	{"CSVEncode", `to_?csv|@csv`, encodeWithIndent(CSVOutputFormat, 0), 0},
+
+	{"TSVDecode", `from_?tsv|@tsvd`, decodeOp(TSVObjectInputFormat), 0},
 	{"TSVEncode", `to_?tsv|@tsv`, encodeWithIndent(TSVOutputFormat, 0), 0},
 
 	{"Base64d", `@base64d`, decodeOp(Base64InputFormat), 0},

pkg/yqlib/lib.go

@@ -205,10 +205,10 @@ func findInArray(array *yaml.Node, item *yaml.Node) int {
 	return -1
 }
 
-func findKeyInMap(array *yaml.Node, item *yaml.Node) int {
+func findKeyInMap(dataMap *yaml.Node, item *yaml.Node) int {
 
-	for index := 0; index < len(array.Content); index = index + 2 {
-		if recursiveNodeEqual(array.Content[index], item) {
+	for index := 0; index < len(dataMap.Content); index = index + 2 {
+		if recursiveNodeEqual(dataMap.Content[index], item) {
 			return index
 		}
 	}

pkg/yqlib/operator_encoder_decoder.go

@@ -114,6 +114,10 @@ func decodeOperator(d *dataTreeNavigator, context Context, expressionNode *Expre
 		decoder = NewBase64Decoder()
 	case PropertiesInputFormat:
 		decoder = NewPropertiesDecoder()
+	case CSVObjectInputFormat:
+		decoder = NewCSVObjectDecoder(',')
+	case TSVObjectInputFormat:
+		decoder = NewCSVObjectDecoder('\t')
 	}
 
 	var results = list.New()

pkg/yqlib/operator_encoder_decoder_test.go

@@ -66,11 +66,27 @@ var encoderDecoderOperatorScenarios = []expressionScenario{
 	{
 		description: "Decode props encoded string",
 		document:    `a: "cats=great\ndogs=cool as well"`,
-		expression:  `.a |= from_props`,
+		expression:  `.a |= @propsd`,
 		expected: []string{
 			"D0, P[], (doc)::a:\n    cats: great\n    dogs: cool as well\n",
 		},
 	},
+	{
+		description: "Decode csv encoded string",
+		document:    `a: "cats,dogs\ngreat,cool as well"`,
+		expression:  `.a |= @csvd`,
+		expected: []string{
+			"D0, P[], (doc)::a:\n    - cats: great\n      dogs: cool as well\n",
+		},
+	},
+	{
+		description: "Decode tsv encoded string",
+		document: `a: "cats	dogs\ngreat	cool as well"`,
+		expression: `.a |= @tsvd`,
+		expected: []string{
+			"D0, P[], (doc)::a:\n    - cats: great\n      dogs: cool as well\n",
+		},
+	},
 	{
 		skipDoc:    true,
 		document:   "a:\n  cool:\n    bob: dylan",