I definitely share this exact experience. I often times code does not "just flow" out of my head. Even though I know, at a high level, what I need to do. I just need a memory boost. Other times I need something very specific and for various reasons, notably time and effort, I do not want to figure it out from scratch. So I turn to SO because sometimes modifying existing code snippet is a lot easier than writing it from scratch.
Now, this is specific to small code snippets I can ready and understand. Not hundreds of lines of code.
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