deno - 从 Deno stdin 获取值

Question

我们如何从 Deno 的标准输入中获取值？
不知道怎么用Deno.stdin .
一个例子将不胜感激。

Answer 1

Deno.stdin类型为 File ，因此您可以通过提供 Uint8Array 来读取它作为缓冲区并调用 Deno.stdin.read(buf)

window.onload = async function main() {
  const buf = new Uint8Array(1024);
  /* Reading into `buf` from start.
   * buf.subarray(0, n) is the read result.
   * If n is instead Deno.EOF, then it means that stdin is closed.
   */
  const n = await Deno.stdin.read(buf); 
  if (n == Deno.EOF) {
    console.log("Standard input closed")
  } else {
    console.log("READ:", new TextDecoder().decode(buf.subarray(0, n)));
  }
}