Oh wow,
This works just as I wanted it too. All of your assumptions are correct and this works exactly like the native 'close other tabs' does and just as fast 
The only thing is that I get this message whenever there are two tabs of same name open :
Instead of it closing both of them or leaving them open. Thank you so much Dan.
Also remember this post that you helped me with? I want make it so that this modified clipboard from my 2Do app will get piped to Bitbar or something alike so that I can then display the task in my menu bar. I was just wondering, would such a thing be possible to do? I remember seeing Bitbar menu bar icon from one of your screenshots so I presume you are familiar with it.
This would indeed be really nice to make as I will be able to see a current task I want to work on in my menu bar and keep focused on the work. Essentially I just want to display text that will get piped into it from the content of the clipboard. What do you think of it? Would it be hard to do you think?