# Alex Kladov - Size Matters (Highlights)  ## Highlights - he number of inputs and the outputs together is the size of the interface. And the length of the body measures implementation. You want functions with bodies that are large *relative* to their interfaces. You need inverted hourglass shape. The converse is more helpful: hourglass functions/modules are a smell. ([View Highlight](https://read.readwise.io/read/01kb6nh4zfgb6fpz3sa6pjdq29)) ^961865406 - Hence, the 100 columns limit, as that allows you to comfortably fit two copies of code side by side on a modern 16x9 display. ([View Highlight](https://read.readwise.io/read/01kb6nhzra4z2q25jx8mkzm1bv)) ^961865508 - Hence, the Schelling point for the upper bound on function length: it’d be better to fit on a screen. Which is about 60-70 lines. ([View Highlight](https://read.readwise.io/read/01kb6nkhzx1ykk8a69f3edx2ep)) ^961865566