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en:arduino:libraries:filepeek

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en:arduino:libraries:filepeek [2016/12/25 22:15]
en:arduino:libraries:filepeek [2016/12/25 22:15] (当前版本)
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 +[[en:​arduino:​libraries:​sd|SD]] : File class
 +====== peek() ======
  
 +
 +Read a byte from the file without advancing to the next one. That is, successive calls to peek() will return the same value, as will the next call to read().
 +
 +\\ peek() inherits from the Stream utility class.
 +===== Syntax =====
 +
 +file.peek()
 +===== Parameters =====
 +
 +file: an instance of the File class (returned by SD.open())
 +===== Returns =====
 +
 +The next byte (or character), or -1 if none is available.
 +===== See Also =====
 +
 +  * available()
 +  * read()
 +  * write()
 +  * Stream.peek()
 +[[en:​arduino:​libraries|Reference Home]]
en/arduino/libraries/filepeek.txt · 最后更改: 2016/12/25 22:15 (外部编辑)