Sometimes I code without the internet (on vacation, on trains and planes, etc) and it's not too hard. The major difficulties are indeed around the things you m

Sometimes I code without the internet (on vacation, on trains and planes, etc) and it's not too hard. The major difficulties are indeed around the things you mention, but one solution for that is having a few large projects open in another IDE window so you can search for functions, idioms, algorithms, patterns. I guess I got used to it because I started coding professionally before Stack Overflow. There was Expert Sex Change, but it sucked, so I avoided it like the plague. It was mostly C#, so the combination of Static Typing + Intelisense also helped me not needing internet. Before C# I coded in Perl, so seeing other people's code wouldn't help anyway ;)