Smalltalk：将输出写入文件

Question

通常，我将输出写入到成绩单中...

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如何将输出写入文件？

Answer 1

您想要使用 FileStream

请参阅此描述 FileStreams 的链接

摘录如下：

---

FileStream
FileStreams support all of ExternalStreams protocol. They can be created to read, write, readWrite or append from/to a file.
Creation:

* for reading:

      aStream := FileStream readonlyFileNamed:aFilenameString

* to read/write an existing file:

      aStream := FileStream oldFileNamed:aFilenameString

* to create a new file for writing:

      aStream := FileStream newFileNamed:aFilenameString

以上是内部低级实例创建协议，使用起来有些政治不正确。为了可移植性，请使用伴随类 Filename 来创建 fileStreams：

* for reading:

      aStream := aFilenameString asFilename readStream

* to read/write an existing file:

      aStream := aFilenameString asFilename readWriteStream

* to create a new file for writing:

      aStream := aFilenameString asFilename writeStream

* to append to an existing file:

      aStream := aFilenameString asFilename appendingWriteStream

Answer 2

| fileName aStream |

fileName := (Filename named: 'stream.st').

aStream := fileName readAppendStream.

aStream nextPutAll: 'What is the best class I have ever taken?'.

aStream cr.

aStream flush.

aStream nextPutAll: 'It is the VisualWorks Intro class!'.

aStream close.

Answer 3

当然，如果您不编写二进制或默认编码，请不要忘记处理您想要的字符编码。在 Pharo/Squeak 中，将转换器设置为所需的 TextConverter 子类。