Regex Remove Json Property

I'd like to remove a stringfied json's property based on its key wherever it is, whatever its value type is. But removing it only if its value is a string and its on the root level

Solution 1:

If you have any way of using a parser it's a more stable and readable solution. The regex \s*\"attr\" *: *\".*\"(,|(?=\s*\})) should be shorter and better.

Example

Several changes I made to help:

1. Don't use so many character classes like [,]. If there is only one element in a character class it should be left by itself.
2. Only use numbered counts when required. Ex: {0,1} is ? and {1} is pointless.
3. Instead of searching for a comma in the previous line to see if it is the end of a list checking if there is a } following the line allows you to group the conditionals together.
4. A positive lookahead is used at the end to search for } so it wouldn't be removed during the substitution.

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Update with bugfix mentioned in comments. Trailing commas would be left if the attribute is last. The simplest way I found to fix this was to match both cases. So, you'll have to fill in attr twice.

(,\s*\"attr\" *: *\".*\"|(?=\s*\}))|(\s*\"attr\" *: *\".*\"(,|(?=\s*\})))

Examples with added tests cases

Solution 2:

I modified the regex from the first example, it works better even if is Flat JSON

\s*\"attr\" *: *(\"(.*?)\"(,|\s|)|\s*\{(.*?)\}(,|\s|))

Example