How to convert string array to JSON array in Javascript?

Question

I have string array like this:

"[totRev=248634.29858677526, totEBITDA=34904.9893085068, EBITDA_Operating_Cash_Flow_Margin=0.140386863387, debt_Service_Coverage_Ratio=16.7793849967, gross_Debt_to_EBITDA=0.3626422278, gross_Debt=50632.09233331651, cash_Available_for_Debt=102746.09168349924, debt_Servicing_Amount=6123.352655871018]"

How do I convert this either into a JSON Array or a JSON object like

{totRev:'248634.29858677526',....etc} 

Answer 1

Use substring, split and reduce

str.substring( 1,str.length - 1 ) //remove [ and ] from the string
    .split(",") //split by ,
    .reduce( (a,b) => (i = b.split("="), a[i[0]] = i[1], a ) , {} );

Reduce explanation

• Split b (element in the array such as totRev=248634.29858677526) by =
• Assign the first item in the array as key to a (accumulator initialized as {}) and value as second item of the array
• Return a

Demo

var str = "[totRev=248634.29858677526, totEBITDA=34904.9893085068, EBITDA_Operating_Cash_Flow_Margin=0.140386863387, debt_Service_Coverage_Ratio=16.7793849967, gross_Debt_to_EBITDA=0.3626422278, gross_Debt=50632.09233331651, cash_Available_for_Debt=102746.09168349924, debt_Servicing_Amount=6123.352655871018]";
var output = str.substring(1,str.length-1).split(",").reduce( (a,b) => (i = b.split("="), a[i[0].trim()] = i[1], a ) , {} );
console.log(output);