how to replace part of part of string in javascript

Question

I have two GUIDs. I am looking for to replace c013d94e from 1st guid with cd11d94e of second guid in Javascipt.

I checked javascript replace() method but not sure how i can use it with my specific case.

c013d94e-3210-e511-82ec-303a64efb676 - 1st Guid

cd11d94e-3210-e511-82ec-303a64efb676 - 2nd Guid

Following is my code where i am trying to do it

for(var i=0; i < response[1].length;i++)
    angular.forEach($scope.studentPermissions[i][0].Children, function (subject) {
    string 1stGuid= response[1].data[i].Id;   // it contains cd11d94e-3210-e511-82ec-303a64efb676
    subject.Id = // it contains c013d94e-3210-e511-82ec-303a64efb676

    });

Will the other part of the string always be the same, despite the input? Then you don't even need to use replace, you could just construct a new string. — user3117575
– user3117575, Commented Jun 13, 2015 at 11:42
@Jamen. Yes the other part of 1st string will always be same. How can i use concatenate? — TheKingPinMirza
– TheKingPinMirza, Commented Jun 13, 2015 at 11:44

Alex McMillan · Accepted Answer · 2015-06-13 11:44:36Z

1

replace takes 2 parameters, the first is the string to search for and the second is the replacement string. It doesn't modify the original string, it simply returns a new string with the value replaced.

You can perform your replace like this:

var guid = 'c013d94e-3210-e511-82ec-303a64efb676';
guid = guid.replace('c013d94e', 'cd11d94e');

console.log(guid); // 'cd11d94e-3210-e511-82ec-303a64efb676'

answered Jun 13, 2015 at 11:44

Alex McMillan

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Comments

user3117575 · Accepted Answer · 2015-06-13 11:46:42Z

0

@Jamen. Yes the other part of 1st string will always be same. How can i use concatenate?

You don't even need to use replace then? Just make a brand new string:

var guid = "cd11d94e-3210-e511-82ec-303a64efb676";

But, to actually answer the question in the title:

var input = "c013d94e-3210-e511-82ec-303a64efb676";
var output = input.replace("c013d94e", "cd11d94e");

console.log(output); // cd11d94e-3210-e511-82ec-303a64efb676

But like I said, in your situation this shouldn't be necessary, based on the quote.

answered Jun 13, 2015 at 11:46

user3117575

1 Comment

TheKingPinMirza Over a year ago

var output = input.replace("c013d94e", "cd11d94e"); This probably wont work becuase my 2nd guid is storied in array. so im iterating from array and getting this length and need to replace string for all child elements.

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