He/Him; Senior Software Developer, IT Swiss-army-knife, 3 programming blades, 1 hardware, 1 networking and infrastructure and a corkscrew. The tweezers have long since been lost. (Recent ADHD diag.)
My flippant answer is: both Zero and All.
Zero on account of I "know" parts of languages, enough to use and perform my duties,
All on account of I "know" enough theory as to what the effect I want done to the silicon with an abstract understanding of the machine language used to do those things. Understanding that programming languages are abstractions over that, they are different tools to accomplish the same underlying tasks.
But I don't know lisp yet ;)
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My flippant answer is: both Zero and All.
Zero on account of I "know" parts of languages, enough to use and perform my duties,
All on account of I "know" enough theory as to what the effect I want done to the silicon with an abstract understanding of the machine language used to do those things. Understanding that programming languages are abstractions over that, they are different tools to accomplish the same underlying tasks.
But I don't know lisp yet ;)