Eliminate consecutive duplicate numbers in a JSON object using JavaScript

Question

Eliminate consecutive duplicate numbers in a JSON object using JavaScript

Here is the json data:

{ "question_1": 
  { "type"  : "string"
  , "title" : "What did he want to make for dinner?"
  , "enum": 
    [ " a.) He wanted to make some salad and spaghetti"
    , " b.) He wanted to make some pasta salad"
    ] 
  , "required": false
  } 
, "question_2": 
  { "type": "string"
  , "title": "Did he have the ingredients to make dinner?"
  , "enum": 
    [ " a.) Yes, he had the ingredients"
    , " b.) No, he didn't have the ingredients"
    ] 
  , "required": false
  } 
, "question_3": 
  { "type"  : "string"
  , "title" : "Where did he go shopping?"
  , "enum": 
    [ " a.) He went to Albertsons"
    , " b.) He went to Albertos"
    ] 
  , "required": false
  } 
}

Looking at my json, I noticed that there are repeated numbers next to each other in the question titles.

For example:

1. 1. => 1.
2. 2. => 2.
3. 3. => 3.

I am seeking a solution to eliminate this repetition.

Is there a way to remove duplicate numbers next to each other within the json?

javascript json

Answer 1

Answer №1

One way to update it is by using a regex. By utilizing grouping references with parentheses like (\d), you can create a group containing one decimal, allowing you to preserve numbers such as "1. 2." and reference them in the replacement process with \1:

const data =
  { "question_1": 
    { "type"  : "string"
    , "title" : "1. What did he want to make for dinner?"
    , "enum": 
      [ " a.) He wanted to make some salad and spaghetti"
      , " b.) He wanted to make some pasta salad"
      ] 
    , "required": false
    } 
  , "question_2": 
    { "type": "string"
    , "title": "2. Did he have the ingredients to make dinner?"
    , "enum": 
      [ " a.) Yes, he had the ingredients"
      , " b.) No, he didn't have the ingredients"
      ] 
    , "required": false
    } 
  , "question_3": 
    { "type"  : "string"
    , "title" : "3. Where did he go shopping?"
    , "enum": 
      [ " a.) He went to Albertsons"
      , " b.) He went to Albertos"
      ] 
    , "required": false
    } 
  };

Object.values(data).forEach(v => v.title = v.title.replace(/(\d)\. \1\./, '$1.'))
console.log(Object.values(data).map(v => v.title))

Answer 2

One way to update it is by using a regex. By utilizing grouping references with parentheses like (\d), you can create a group containing one decimal, allowing you to preserve numbers such as "1. 2." and reference them in the replacement process with \1:

const data =
  { "question_1": 
    { "type"  : "string"
    , "title" : "1. What did he want to make for dinner?"
    , "enum": 
      [ " a.) He wanted to make some salad and spaghetti"
      , " b.) He wanted to make some pasta salad"
      ] 
    , "required": false
    } 
  , "question_2": 
    { "type": "string"
    , "title": "2. Did he have the ingredients to make dinner?"
    , "enum": 
      [ " a.) Yes, he had the ingredients"
      , " b.) No, he didn't have the ingredients"
      ] 
    , "required": false
    } 
  , "question_3": 
    { "type"  : "string"
    , "title" : "3. Where did he go shopping?"
    , "enum": 
      [ " a.) He went to Albertsons"
      , " b.) He went to Albertos"
      ] 
    , "required": false
    } 
  };

Object.values(data).forEach(v => v.title = v.title.replace(/(\d)\. \1\./, '$1.'))
console.log(Object.values(data).map(v => v.title))

Answer 3

Answer №2

If you are working with JSON data and planning to use the JSON.parse method, there is an interesting feature you can utilize known as the optional reviver parameter.

Reviving Values

When a function is passed as the reviver, it specifies how each parsed value should be transformed before being returned. If a non-callable value is encountered, it will be ignored. The function receives two arguments:

Key

The key associated with the value being processed.

Value

The parsed value that needs transformation.

const jsonData = `{
  "question_1": {
    "type": "string",
    "title" : "1. 1. What did he want to make for dinner?"
  },
  "question_2": {
    "type": "string",
    "title": "2. 2. Did he have the ingredients to make dinner?"
  } 
}`;

console.log(
  JSON.parse(jsonData, (key, value) => typeof value === 'string' ? value.replace(/(\d)\. \1\./, '$1.') : value)
)

Building upon Moritz Ringler's approach.

Answer 4

If you are working with JSON data and planning to use the JSON.parse method, there is an interesting feature you can utilize known as the optional reviver parameter.

Reviving Values

When a function is passed as the reviver, it specifies how each parsed value should be transformed before being returned. If a non-callable value is encountered, it will be ignored. The function receives two arguments:

Key

The key associated with the value being processed.

Value

The parsed value that needs transformation.

const jsonData = `{
  "question_1": {
    "type": "string",
    "title" : "1. 1. What did he want to make for dinner?"
  },
  "question_2": {
    "type": "string",
    "title": "2. 2. Did he have the ingredients to make dinner?"
  } 
}`;

console.log(
  JSON.parse(jsonData, (key, value) => typeof value === 'string' ? value.replace(/(\d)\. \1\./, '$1.') : value)
)

Building upon Moritz Ringler's approach.

Eliminate consecutive duplicate numbers in a JSON object using JavaScript

Answer №1

Answer №2

Reviving Values

Key

Value

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