Function copy

  • copy(src, dst, options?): Promise<number>

  • Copies from src to dst until either EOF (null) is read from src or an error occurs. It resolves to the number of bytes copied or rejects with the first error encountered while copying.

    Parameters

    • src: Reader

      The source to copy from

    • dst: Writer

      The destination to copy to

    • Optionaloptions: {
          bufSize?: number;
      }

      Can be used to tune size of the buffer. Default size is 32kB

      • OptionalbufSize?: number

    Returns Promise<number>

    Number of bytes copied

    Example: Usage

    import { copy } from "@std/io/copy";

    const source = await Deno.open("my_file.txt");
    const bytesCopied1 = await copy(source, Deno.stdout);
    const destination = await Deno.create("my_file_2.txt");
    const bytesCopied2 = await copy(source, destination);

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