en:arduino:libraries:filepeek
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en:arduino:libraries:filepeek [2016/12/25 22:15] |
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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)
