[NTG-context] Define doifoneelse

Hi, I want to define a macro, \doifoneelse, that checks if the first argument is 1 or not. It should work for decimals and strings also. So, \doifoneelse{1}{a}{b} gives a \doifoneelse{1.5}{a}{b} gives b \doifonelese{string}{a}{b} gives b Can someone suggest how to define this? Thanks, Aditya