Looking to extract a specific Number enclosed within square brackets, like so:
Identify the 0 within
actionFields[actionFields][0][data[Report][action]]I've been working on this but keep getting a null result.
var match, matchRegEx = /^\(?\[(\d)\]\)$/;
nameAttr = "actionFields[actionFields][0][data[Report][action]]",
match = matchRegEx.exec(nameAttr);
Upon examination of your regular expression, it appears that you are searching for the specific pattern in the string: starting with zero or one "(" followed by "[" then a digit, closing with "]" and ")". Finally, it must be the end of the string.
It seems that you could simplify this to just /\[(\d)\]/, unless you anticipate the occurrence of "[0]" elsewhere in the string.
If you'd like to see an example of this regex pattern in action, check out this RegexPal.
The correct regular expression to use is:
\[(\d+)\]
Make sure to capture the first group in your regex.
An issue with the current regex is that it is constrained to match only at the beginning of input (^) and at the end $.
When there is just a single digit /\d+/
It is possible to verify solely for that number
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