Replace Substring in Specific Key Value of an Array

Question

I have an array & I am trying to replace a substring of a particular key's value w/ another substring.

Example key:value

var myobj = {};    
key1: "FieldName[8] = \"field9\";"

I was trying to change the [8] to [9]

var kstr = '[' + k + ']'; // [8]
var dbstr = '[' + dbindex + ']'; // [9]
myobj[key1].replace(kstr, dbstr);
console.log('Key1: ' + myobj[key1]) // Still has [8] in it !

does the value of myobj[key1] is "FieldName[8] = \"field9\";"? — david
– david, Commented Jul 25, 2018 at 2:00

Robby Cornelissen · Accepted Answer · 2018-07-25 02:01:39Z

3

As the MDN documentation for String.prototype.replace() states:

Note: The original string will remain unchanged.

So, you need to assign the result of the replace() operation back to the variable:

myobj[key1] = myobj[key1].replace(kstr, dbstr);

answered Jul 25, 2018 at 2:01

Robby Cornelissen

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