Hi everyone

Does anyone know of a way to select by position and value, lets say I have a list of all 6 digit numbers and I want to select all those that have say 3, 5, 6 in position 2, 4, 5, so 138569 would be one of those that meet the criteria. The positions and numbers are stored as lists and can be 1, or 2 or 3 digits or more in length.

So we could have

a=Range[100000,999999];b={2,4,5};c={5,2,1}. 

where list b is the position's and list c are the values. I have solved it but not very efficiently, where I have converted to strings and used stringtake and stringposition within a do loop, the loop being equal to the length of the list {b}. where each iteration is a smaller list etc.

Paul.