Function flatDeep

src/Operations.js:732–744

(iter, currentDepth)

    let iterations = 0;
    let stopped = false;
    function flatDeep(iter, currentDepth) {
      iter.__iterate((v, k) => {
        if ((!depth || currentDepth < depth) && isCollection(v)) {
          flatDeep(v, currentDepth + 1);
        } else {
          iterations++;
          if (fn(v, useKeys ? k : iterations - 1, flatSequence) === false) {
            stopped = true;
          }
        }
        return !stopped;
      }, reverse);
    }
    flatDeep(collection, 0);
    return iterations;
  };