Call multiple denops functions sequentially without RPC overhead and return values

import { Denops } from "../mod.ts";
import { collect } from "./collect.ts";

export async function main(denops: Denops): Promise<void> {
  const results = await collect(denops, (denops) => [
    denops.eval("&modifiable"),
    denops.eval("&modified"),
    denops.eval("&filetype"),
  ]);
  // results contains the value of modifiable, modified, and filetype
}

Not like batch, the function can NOT be nested.

Note that denops.call() or denops.eval() always return falsy value in collect(), indicating that you cannot write code like below:

import { Denops } from "../mod.ts";
import { collect } from "./collect.ts";

export async function main(denops: Denops): Promise<void> {
  const results = await collect(denops, (denops) => {
    // !!! DON'T DO THIS !!!
    (async () => {
      if (await denops.call("has", "nvim")) {
        // deno-lint-ignore no-explicit-any
        await (denops.call("api_info") as any).version;
      } else {
        await denops.eval("v:version");
      }
    })();
    return [];
  });
}

The denops instance passed to the collect block is NOT available outside of the block. An error is thrown when denops.call(), denops.cmd(), or denops.eval() is called.

Note that denops.redraw() and denops.cmd() cannot be called within collect(). If it is called, an error is raised.