find the values in a json object starting with one value

Question

hi friends,

 

I have json object like this

0:{id:"pf-elevator3"}

1:{id:pf-elevator}

2: {id:"p-s-12"}

 

now what I am looking is i need to replace the json array values starting with "pf-" to undefined in the array.

 

I tried with startswith and Exists getting function is not defined error.

 

how to acheive this output?please help me