That definitely sounds like something like the Cachex library. :-)
On Thursday, September 15, 2016 at 7:01:44 PM UTC-6, Shyam Sankaran wrote: > > Agreed. But, there are some functions which may have complex computations > but still are idempotent. Eg. Sorting, filtering . All elixir elements > being immutable definitely helps. > > Thinking further, for example, a function that gets something from db > which does not change frequently (a user, maybe) might be a good use case. > Definitely saves some good performance. However, after some time the > function becomes "unreliable", because the user data is bound to change at > some time, right. > > So, for the above problem, what if the function was not permanent? Lets > call it "Transient function". It expires after some time!! I define a > function and decorate with some metadata which specifies whether its > execution must be cached. If so how long?. Something like: > > cache get_usr ,ttl: 10 > def get_usr do: get_from_db > > Don't know, if it is even possible. just some crazy thoughts :) > > On Thursday, September 15, 2016 at 9:55:49 AM UTC-4, OvermindDL1 wrote: >> >> For something as simple as addition the pattern matching would gain no >> speed, but in more complex things it could, however you would not know the >> answer ahead of time for that so usually something like ETS is used to >> cache like that. >> >> On Wednesday, September 14, 2016 at 9:15:42 PM UTC-6, Shyam Sankaran >> wrote: >>> >>> I was reading about metaprgramming in elixir where Chris explains how >>> easily elixir provides unicode support in a few lines of code through >>> pattern matching. I thought it would be a cool idea to cache functions by >>> generating code which defines the function with the previously passed >>> parameters as input and the computed value as the body of the function. >>> Next time, instead of evaluating the function, you just have to pattern >>> match !!! >>> >>> Lets assume a function: >>> >>> def add(a,b) do: a+b >>> >>> add(1,2) -> evaluates 1+2 = 3 -> spawn a function that creates a >>> function : def add(1,2) do: 3 >>> add(1,2) -> pattern matches with add(1,2) -> returns 3 >>> >>> thoughts? >>> >>> >>> >>> -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. To unsubscribe from this group and stop receiving emails from it, send an email to elixir-lang-core+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-core/d03073a1-027c-4854-9986-01c8ea661fb9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
