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typescriptdecoratorlodash

lodash's _.memoize with typescript methods

Does anyone have any experience incorporating lodash's memoize function with a typescript method?

I know typescript supports decorators but I've been having a bit of trouble understanding them.

I created an easy test code to modify with lodash wired to make explaining the solution easier:

https://codepen.io/thinkbonobo/pen/XKyaKY?editors=0010

I'd like to memoize run so that it returns the answer without the forced wait. If it is successfully memoized it will return "MEMOIZED!!! :)"

  run() {
    return this.doSomeProcessing();
  }

(N.B., I would suggest while coding to comment out the wait function so it doesn't give the synchronous lag from it as the program tries to run)

Solution

  • You can easily memoize run with the once function https://lodash.com/docs#once: 

       run = _.once(() => {
     return this.doSomeProcessing();
   });

    Of course this makes it a member instead of a method but that's okay🌹.