How to parse string statement in javascript?

Question

I want to parse this statement in javascript

["TWA"]["STEL"]

and get TWA, STEL value. I guess this is a json and use JSON.parse() method but doesn't work.

No it is not JSON. A regex would work. If you want to use JSON.parse you need JSON.parse('["TWA"]["STEL"]'.replace('][',',')) — mplungjan
– mplungjan, Commented Sep 29, 2018 at 14:13
This is not valid JSON and cannot be parsed as such. You could use regular expressions as a quick way of lexing this. Or, you could split on "[" (or "]") and remove the unwanted characters from the parts. — RWRkeSBZ
– RWRkeSBZ, Commented Sep 29, 2018 at 14:16

mplungjan · Accepted Answer · 2018-09-29 14:19:23Z

3

That is not a JSON, but you can easily parse it with the pattern matcher:

https://jsfiddle.net/60dshj3x/

let text = '["TWA"]["STEL"]'
let results = text.match(/\["(.*)"\]\["(.*)"]/)

// note that results[0] is always the entire string!
let first = results[1]
let second = results[2]

console.log("First: " + first + "\nSecond: " + second);

edited Sep 29, 2018 at 14:19

mplungjan

180k29 gold badges183 silver badges246 bronze badges

answered Sep 29, 2018 at 14:18

AlenL

4763 silver badges7 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

A l w a y s S u n n y · Accepted Answer · 2018-09-29 14:16:04Z

1

If it is a string then a simple regex will do the trick.

const regex = /\["(\w+)"\]/gm;
const str = `["TWA"]["STEL"]`;
let m;
let words = [];
while ((m = regex.exec(str)) !== null) {
  // This is necessary to avoid infinite loops with zero-width matches
  if (m.index === regex.lastIndex) {
    regex.lastIndex++;
  }

  // The result can be accessed through the `m`-variable.
  m.forEach((match, groupIndex) => {
   if(groupIndex===1)words.push(match)
  });
}

console.log(words.join(','))

answered Sep 29, 2018 at 14:16

A l w a y s S u n n y

38.8k9 gold badges68 silver badges120 bronze badges

5 Comments

mplungjan Over a year ago

Or shorter: JSON.parse('["TWA"]["STEL"]'.replace('][',','))

Ele Over a year ago

For this ["TWA."]["STEL"] that approach doesn't work.

A l w a y s S u n n y Over a year ago

@mplungjan Yes sir, totally agreed with you :) May I edit my answer?

A l w a y s S u n n y Over a year ago

@Ele agree. but OP posted string like ["TWA"]["STEL"] that's why I used that

mplungjan Over a year ago

Just leave my comment. No need to add it to your answer

Collectives™ on Stack Overflow

How to parse string statement in javascript?

2 Answers 2

Comments

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related