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copied!<p>For manipulating files, the <code>os</code> package is your friend:</p> <pre><code>f, err := os.Open("myfile") if err != nil { panic(err) } defer f.Close() </code></pre> <p>For more control over how the file is open, see <code>os.OpenFile()</code> instead <a href="http://golang.org/pkg/os/#OpenFile" rel="noreferrer">(doc)</a>.</p> <p>For reading files, there are many ways. The <code>os.File</code> type returned by <code>os.Open</code> (the <code>f</code> in the above example) implements the <code>io.Reader</code> interface (it has a <code>Read()</code> method with the right signature), it can be used directly to read some data in a buffer (a <code>[]byte</code>) or it can also be wrapped in a buffered reader (type <code>bufio.Reader</code>).</p> <p>Specifically for binary data, the <code>encoding/binary</code> package can be useful, to read a sequence of bytes into some typed structure of data. You can see an example in the <a href="http://golang.org/pkg/encoding/binary/#Read" rel="noreferrer">Go doc here</a>. The <code>binary.Read()</code> function can be used with the file read using the <code>os.Open()</code> function, since as I mentioned, it is a <code>io.Reader</code>.</p> <p>And there's also the simple to use <code>io/ioutil</code> package, that allows you to read the whole file at once in a byte slice (<code>ioutil.ReadFile()</code>, which takes a file name, so you don't even have to open/close the file yourself), or <code>ioutil.ReadAll()</code> which takes a <code>io.Reader</code> and returns a slice of bytes containing the whole file. Here's the <a href="http://golang.org/pkg/io/ioutil/#ReadAll" rel="noreferrer">doc on ioutil</a>.</p> <p>Finally, as others mentioned, you can google about the Go language using "golang" and you should find all you need. The <a href="https://groups.google.com/forum/#!forum/golang-nuts" rel="noreferrer">golang-nuts mailing list</a> is also a great place to look for answers (make sure to search first before posting, a lot of stuff has already been answered). To look for third-party packages, check the <a href="http://godoc.org/" rel="noreferrer">godoc.org</a> website.</p> <p>HTH</p>

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