IPhone has deleted all of my apps when I updated to IOS8?

I didn't have enough storage on my iPhone 4s to update so I had to download the update to my computer then download it to my phone from there.
So I tried that and it worked but when it was all done there was absolutely no apps on my phone. All my photos music and messages were all still there but every single one of my apps were gone. I tried to restore from a backup but it was the exact same thing. It's like iTunes just deleted all my apps without my permission to make room for IOS8 or something like that.

How can I get them all back? There were a lot of important in app files I lost!

If you don't have enough storage i doubt whether you can. Apps take up a considerable amount of space, and that's what iTunes has done, deleted your Apps to make space for IOS8

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