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Grep value of a specific key from a String, concatenated of key : value pairs

Reversing the value key pairs of array using sed or pattern replacement or brace expansion?extracting specific substrings from stringReading a string till a key word and replacing from there with another stringMatching “keyword value” pairs from semi-structured inputComplete key value pairssed/awk replace a specific pattern under another patternChecking duplicate value in specific column in csv file with pipe seperatedGrep a list of words from pairs of filesHow to grep lines which have more than specific number of special charactersremove specific characters from a string

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

2

I have a string which is concatenation of "key":"value" pairs seperated by "," like-

KEY1:VALUE1, KEY2:VALUE2, KEY3:VALUE3

And from this string I have to grep value for a specific string,lets say KEY2, so output of our command should be VALUE2.

shell-script awk sed

share|improve this question

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

New contributor

Abhijeet srivastava is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Can the values contain quotes commas or colons? Is it JSON?
  
  – Jeff Schaller♦
  May 13 at 12:54
  

  
  
  
  

add a comment | 

2

I have a string which is concatenation of "key":"value" pairs seperated by "," like-

KEY1:VALUE1, KEY2:VALUE2, KEY3:VALUE3

And from this string I have to grep value for a specific string,lets say KEY2, so output of our command should be VALUE2.

shell-script awk sed

share|improve this question

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

New contributor

Abhijeet srivastava is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Can the values contain quotes commas or colons? Is it JSON?
  
  – Jeff Schaller♦
  May 13 at 12:54
  

  
  
  
  

add a comment | 

I have a string which is concatenation of "key":"value" pairs seperated by "," like-

KEY1:VALUE1, KEY2:VALUE2, KEY3:VALUE3

And from this string I have to grep value for a specific string,lets say KEY2, so output of our command should be VALUE2.

shell-script awk sed

share|improve this question

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

New contributor

Abhijeet srivastava is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

KEY1:VALUE1, KEY2:VALUE2, KEY3:VALUE3

share|improve this question

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

New contributor

Abhijeet srivastava is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

New contributor

Abhijeet srivastava is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

New contributor

Abhijeet srivastava is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked May 13 at 12:49

Abhijeet srivastavaAbhijeet srivastava

111

3 Answers
3

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8

Using pgrep:

grep -Po '(^|[ ,])KEY1:K[^,]*'

or egrep and cut:

grep -Eo '(^|[ ,])KEY2:[^,]*' | cut -d: -f2-

For both methods, the Value is not allowed to contain comma.

---

If you had proper json, e.g.

 "KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3" 

you could use jq:

jq ".KEY2"

share|improve this answer

edited May 14 at 9:02

answered May 13 at 12:56

pLumopLumo

5,450925

add a comment | 

0

With regular grep assuming VALUE doesn't contain a colon:

grep -o 'KEY2:[^,]+' | grep -o '[^:]+$'

share|improve this answer

edited May 13 at 14:24

answered May 13 at 14:18

ThorThor

12.4k13963

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @RoVo: added caveat
  
  – Thor
  May 13 at 14:25
  

  
  
  
  

add a comment | 

0

To grep only the value

echo $myString | grep -Po "(?<=KEY2:)[^,]*"

or

grep -Po "(?<=KEY2:)[^,]*" <<< $myString

share|improve this answer

answered May 13 at 14:52

bu5hmanbu5hman

1,388415

add a comment | 

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8

Using pgrep:

grep -Po '(^|[ ,])KEY1:K[^,]*'

or egrep and cut:

grep -Eo '(^|[ ,])KEY2:[^,]*' | cut -d: -f2-

For both methods, the Value is not allowed to contain comma.

---

If you had proper json, e.g.

 "KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3" 

you could use jq:

jq ".KEY2"

share|improve this answer

edited May 14 at 9:02

answered May 13 at 12:56

pLumopLumo

5,450925

add a comment | 

8

Using pgrep:

grep -Po '(^|[ ,])KEY1:K[^,]*'

or egrep and cut:

grep -Eo '(^|[ ,])KEY2:[^,]*' | cut -d: -f2-

For both methods, the Value is not allowed to contain comma.

---

If you had proper json, e.g.

 "KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3" 

you could use jq:

jq ".KEY2"

share|improve this answer

edited May 14 at 9:02

answered May 13 at 12:56

pLumopLumo

5,450925

add a comment | 

Using pgrep:

grep -Po '(^|[ ,])KEY1:K[^,]*'

or egrep and cut:

grep -Eo '(^|[ ,])KEY2:[^,]*' | cut -d: -f2-

For both methods, the Value is not allowed to contain comma.

---

If you had proper json, e.g.

 "KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3" 

you could use jq:

jq ".KEY2"

share|improve this answer

edited May 14 at 9:02

answered May 13 at 12:56

pLumopLumo

5,450925

grep -Po '(^|[ ,])KEY1:K[^,]*'

grep -Eo '(^|[ ,])KEY2:[^,]*' | cut -d: -f2-

 "KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3" 

jq ".KEY2"

share|improve this answer

edited May 14 at 9:02

answered May 13 at 12:56

pLumopLumo

5,450925

answered May 13 at 12:56

pLumopLumo

5,450925

answered May 13 at 12:56

pLumopLumo

5,450925

0

With regular grep assuming VALUE doesn't contain a colon:

grep -o 'KEY2:[^,]+' | grep -o '[^:]+$'

share|improve this answer

edited May 13 at 14:24

answered May 13 at 14:18

ThorThor

12.4k13963

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @RoVo: added caveat
  
  – Thor
  May 13 at 14:25
  

  
  
  
  

add a comment | 

0

With regular grep assuming VALUE doesn't contain a colon:

grep -o 'KEY2:[^,]+' | grep -o '[^:]+$'

share|improve this answer

edited May 13 at 14:24

answered May 13 at 14:18

ThorThor

12.4k13963

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @RoVo: added caveat
  
  – Thor
  May 13 at 14:25
  

  
  
  
  

add a comment | 

With regular grep assuming VALUE doesn't contain a colon:

grep -o 'KEY2:[^,]+' | grep -o '[^:]+$'

share|improve this answer

edited May 13 at 14:24

answered May 13 at 14:18

ThorThor

12.4k13963

grep -o 'KEY2:[^,]+' | grep -o '[^:]+$'

share|improve this answer

edited May 13 at 14:24

answered May 13 at 14:18

ThorThor

12.4k13963

answered May 13 at 14:18

ThorThor

12.4k13963

answered May 13 at 14:18

ThorThor

12.4k13963

0

To grep only the value

echo $myString | grep -Po "(?<=KEY2:)[^,]*"

or

grep -Po "(?<=KEY2:)[^,]*" <<< $myString

share|improve this answer

answered May 13 at 14:52

bu5hmanbu5hman

1,388415

add a comment | 

0

To grep only the value

echo $myString | grep -Po "(?<=KEY2:)[^,]*"

or

grep -Po "(?<=KEY2:)[^,]*" <<< $myString

share|improve this answer

answered May 13 at 14:52

bu5hmanbu5hman

1,388415

add a comment | 

To grep only the value

echo $myString | grep -Po "(?<=KEY2:)[^,]*"

or

grep -Po "(?<=KEY2:)[^,]*" <<< $myString

share|improve this answer

answered May 13 at 14:52

bu5hmanbu5hman

1,388415

echo $myString | grep -Po "(?<=KEY2:)[^,]*"

grep -Po "(?<=KEY2:)[^,]*" <<< $myString

share|improve this answer

answered May 13 at 14:52

bu5hmanbu5hman

1,388415

answered May 13 at 14:52

bu5hmanbu5hman

1,388415

answered May 13 at 14:52

bu5hmanbu5hman

1,388415