how to update list of instance cdt values based on condition without foreach() function

Hi ,

I want to update the local variable of the type List of Cdt based on a condition. For eg.

myCDT:{{name:"Albert",age:30,Dept:'Sales',Sal:10000},{name:"Beth",age:28,Dept:'HR',Sal:2000},{name:"Cindy",age:35,Dept:'Finance',Sal:2000},.................}

Dept:{"HR","Sales"}

I wanted to update the Sal of myCDT list found in the Dept variable.

I know we can do it with foreach() function, but I have to map each field in the CDT. I have around 50 fields in my actual  CDT  

Is there another way to implement this ? Please suggest.

Thanks in advance.