Clojurians Log v2

Hi Guys! I was just starting out with Specter. I had a few questions. 1. Are there error-handling functions implemented inside specter? Can I get errors as to where my navigator failed? 2. Can it work with lazy seqs? Will the laziness be preserved? 3. Can we use reducers in setval?

@punit-naik there's no particular error handling done by specter

I can usually tell where I messed up a path by looking at the stack trace

specter will never produce a lazy output

though using select-first can accomplish many of the same things since it terminates navigation as soon as it encounters a matching value

don't know what you mean by #3

@punit-naik the most efficient way to reduce over navigated values is with traverse

https://github.com/nathanmarz/specter/wiki/List-of-Macros#traverse

timing a single invocation tells you absolutely nothing, since neither specter nor the jvm have had a chance to optimize that callsite

use criterium for benchmarking

I think you want (transform [ALL (must :a)] inc [{:a 1 :b 2} {:a 2 :b 1} {:b 3}]) for that code

your path says to navigate to that key

it's doing exactly what you instructed

it's like doing (update {} :a inc)

okay.