My problem about the one liners is not the introduction of new symbols so much as it's the application of many functions on the same line. experienced devs may

My problem about the one liners is not the introduction of new symbols so much as it's the application of many functions on the same line. experienced devs may have some talent reading more complicated expressions. It doesn't remove the fact that the expression requires many mental steps to visualize, and that for each of these steps, even an experienced dev may slip. An example of this is function assembly. When you combine elusive function naming (because we like math, right ?) with assembling of a dozen functions to define a new function, you definitely have a readability problem.