Breaking up and processing a given string in JavaScript: Splitting and token

When it comes to dealing with this specific JavaScript requirement, the challenge lies in working with a string such as:

“  [   condition12  (BRAND) IN 'Beats by Dr. Dre & D\’Silva of type Band’   of type  'IDENTIFIER_STRING’ ]   ”

The task at hand is to tokenize and extract the following components:

- condition12
- BRAND
- IN
- Beats by Dr. Dre & D\’Silva of type Band
- IDENTIFIER_STRING

I was contemplating an algorithm that involves the following steps:

  • Remove the outer square braces: .trim().slice(1, -1)
  • Delete the last occurrence of ‘of type’
  • Split the string by space (ignoring multiple occurrences): .split(/\s+/g))
  • Remove the single quotes from the last array element (containing ‘IDENTIFIER_STRING’ or similar)
  • Create a substring between the first occurrence of “’” and last occurrence of ‘of type’ from the main string, then trim it to get ‘Beats by Dr. Dre & D\’Silva of type Band’

To all you experts out there, do you have a more efficient way to accomplish this task? :)

Thank you in advance!

~VS

javascriptregexstring

Answer №1

Utilize a single regex pattern! The desired values can be found in matches[1] to matches[5].

You may need to adjust the regex depending on the characters present in the tokens. (e.g., it assumes whitespace before and after the condition, which could cause issues if there is whitespace within the condition). You can test the regex here

var str = "[   condition12  (BRAND) IN 'Beats by Dr. Dre & D\'Silva of type Band'   of type  'IDENTIFIER_STRING' ]";
var re = /\[\s+(\S+)\s+\((.*)\)\s+(\S+)\s+'(.*)'\s+of type\s+'(.*)'\s+\]/;

var matches = re.exec(str);

console.log(matches);

Answer №2

If you're looking to extract specific information from a string, using one regex can simplify the process:

text = "  [   condition12  (BRAND) IN 'Beats by Dr. Dre & D\'Silva of type Band'   of type  'IDENTIFIER_STRING' ]   ";
results = text.match(/^\s*\[\s*(.*?)\s+\((.*?)\)\s+(.*?)\s+'(.*?)'\s+.*?'(.*?)'\s*\]\s*$/);

Extracted data:

results[1]: "condition12"
results[2]: "BRAND"
results[3]: "IN"
results[4]: "Beats by Dr. Dre & D'Silva of type Band"
results[5]: "IDENTIFIER_STRING"

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