iterama/web/length-async.js

Composable functional (async) iterable helpers

export var lengthAsync = async function lengthAsync(iterable) {
  var iterator = iterable[Symbol.asyncIterator]();
  var i = 0;

  while (i < Number.MAX_SAFE_INTEGER && !(await iterator.next()).done) {
    ++i;
  }

  return i;
};
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