284 lines
9.7 KiB
HTML
284 lines
9.7 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>The Go Programming Language - Errata</title>
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<link rel="stylesheet" type="text/css" href="style.css" />
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<style>
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body {
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width: 38em;
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margin: auto;
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}
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pre {
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padding-left: 1em;
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}
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</style>
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</head>
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<body>
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<h1>Errata</h1>
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<p>
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<b>p.xiii, ¶1</b>: delete "Object Oberon".
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(Thanks to Luca Boasso, 2016-02-15. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.9, ¶2</b>: For "can compared", read "can be compared".
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(Thanks to Antonio Macías Ojeda, 2015-10-22.
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Corrected in the second printing.)
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</p>
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<p>
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<b>p.13</b>: As printed, the <code>gopl.io/ch1/lissajous</code> program
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is deterministic, not random. We've added the statement below to
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the downloadable program so that it prints a pseudo-random image
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each time it is run. (Thanks to Randall McPherson, 2015-10-19.)
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</p>
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<pre>rand.Seed(time.Now().UTC().UnixNano())</pre>
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<p>
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<b>p.15, ¶2</b>: For "inner loop", read "outer loop".
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(Thanks to Ralph Corderoy, 2015-11-28. Corrected in the third printing.)
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</p>
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<p>
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<b>p.19, ¶2</b>: For "Go's libraries makes", read "Go's library makes".
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(Thanks to Victor Farazdagi, 2015-11-30. Corrected in the third printing.)
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</p>
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<p>
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<b>p.31, ¶6</b>: for "then the short variable declaration acts
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like an <i>assignment</i> to those variables", read "then, for
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those variables, the short variable declaration acts like an
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<i>assignment</i>" and in ¶7, the word "assigns" should be
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italicized for emphasis.
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(Thanks to Terry McKenna, 2016-11-18.)
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</p>
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<p>
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<b>p.40, ¶4</b>: For "value of the underlying type", read
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"value of an unnamed type with the same underlying type".
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<!-- The "unnamed" restriction is there for basic types, which
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are named, so it forbids Celsius(0)==float64(0), for instance.
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-->
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(Thanks to Carlos Romero Brox, 2015-12-19. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.40, ¶1</b>: The paragraph should end with a period, not a comma.
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(Thanks to Victor Farazdagi, 2015-11-30. Corrected in the third printing.)
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</p>
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<p>
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<b>p.43, ¶3</b>: Import declarations are explained in §10.4, not §10.3.
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(Thanks to Peter Jurgensen, 2015-11-21. Corrected in the third printing.)
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</p>
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<p>
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<b>p.48</b>: <code>f.ReadByte()</code> serves as an
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example of a reference to <code>f</code>, but <code>*os.File</code> has no such
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method. For "<code>ReadByte</code>", read "<code>Stat</code>", four times.
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(Thanks to Peter Olsen, 2016-01-06. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.52, ¶2</b>: For "an synonym", read "a synonym", twice.
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(Corrected in the second printing.)
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</p>
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<p>
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<b>p.52, ¶9</b>: For "The integer arithmetic operators", read
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"The arithmetic operators".
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(Thanks to Yoshiki Shibata, 2015-12-20. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.57, ¶4</b>: To "any comparison with NaN always yields false",
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add "(except <code>!=</code>, which is always the negation of
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<code>==</code>)".
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(Thanks to Luca Boasso, 2016-02-15. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.68</b>: The table of UTF-8 encodings is missing a bit from each first byte.
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The corrected table is shown below.
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(Thanks to Akshay Kumar, 2015-11-02.
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Corrected in the second printing.)
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</p>
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<pre>
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0xxxxxxx runes 0−127 (ASCII)
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110xxxxx 10xxxxxx 128−2047 (values <128 unused)
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1110xxxx 10xxxxxx 10xxxxxx 2048−65535 (values <2048 unused)
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11110xxx 10xxxxxx 10xxxxxx 10xxxxxx 65536−0x10ffff (other values unused)</pre>
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<p>
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<b>p.73, ¶1</b>: For "a exercise", read "an exercise".
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(Thanks to vrajmohan, 2015-12-28. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.74</b>: The comment in <code>gopl.io/ch3/printints</code> should say
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<code>fmt.Sprint</code>, not <code>fmt.Sprintf</code>.
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(Corrected in the second printing.)
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</p>
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<p>
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<b>p.75, ¶4</b>: For "<code>%u</code>", read "%<code>o</code>".
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(Thanks to William Hannish, 2015-12-21. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.76</b>: The comment <code>// "time.Duration 5m0s</code> should have
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a closing double-quotation mark.
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(Corrected in the second printing.)
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</p>
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<p>
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<b>p.79, ¶4</b>: "When an untyped constant is
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assigned to a variable, as in the first statement below, or
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appears on the right-hand side of a variable declaration with an
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explicit type, as in the other three statements, ..." has it backwards:
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the <i>first</i>
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statement is a declaration; the other three are assignments.
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(Thanks to Yoshiki Shibata, 2015-11-09. Corrected in the third printing.)
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</p>
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<p>
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<b>p.84, ¶2</b>: For "used as function parameters",
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read "used as function parameters or results".
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(Thanks to Yang Yang 杨玚, 2016-04-18. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.107, ¶6</b>: in "JSON's <code>\U</code><i>hhhh</i> numeric escapes",
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the <code>U</code> should be lowercase: <code>\u</code><i>hhhh</i>.
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(Thanks to Kohei Marumoto (丸本耕平), 2016-09-23. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.112</b>: Exercise 4.11 calls for a "CRUD" (create, read, update,
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delete) tool for GitHub Issues. Since GitHub does not currently allow
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Issues to be deleted, for "delete", read "close".
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(Thanks to Yoshiki Shibata, 2016-01-18. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.115</b>: The anchor element in
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<code>gopl.io/ch4/issueshtml</code>'s template is missing a closing
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<code></a></code> tag.
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(Thanks to Taj Khattra, 2016-01-19. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.132, code display following ¶3</b>: The final comment
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should read:<br/>
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<code>// compile error: can't assign func(int, int) int to func(int) int</code><br/>
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(Thanks to Toni Suter, 2015-11-21. Corrected in the third printing.)
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</p>
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<p>
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<b>p.139, ¶4</b>: For "in Chapter 3", read "in Chapter 4".
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(Thanks to Yoshiki Shibata, 2016-07-03. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.160, ¶4</b>: For <code>Get("item"))</code>,
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read <code>Get("item")</code>.
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(Thanks to Yoshiki Shibata, 2016-02-01. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.166, ¶2</b>: For "way", read "a way".
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(Corrected in the third printing.)
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</p>
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<p>
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<b>p.177, ¶6</b>: For "as we saw", read "as we will see".
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(Thanks to David Drysdale, 2016-07-05. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.200, <code>TestEval</code> function</b>: The format string in the final call to
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<code>t.Errorf</code> should format <code>test.env</code> with <code>%v</code>,
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not <code>%s</code>.
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(Thanks to Mitsuteru Sawa, 2015-12-07. Corrected in the third printing.)
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</p>
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<p>
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<b>p.222, Exercise 8.1</b>: The port numbers for <code>London</code>
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and <code>Tokyo</code> should be swapped in the final command to
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match the earlier commands.
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(Thanks to Kiyoshi Kamishima, 2016-01-08. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.235, ¶3</b>: <code>makeThumbnails</code> refers to the second draft
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of the function, <code>makeThumbnails2</code>.
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(Thanks to 有賀功 Isao Aruga, 2016-07-13. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.272, ¶3</b>: for "the request body", read "the response body".
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(Thanks to 曹春晖, 2016-01-19. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.288, code display following ¶4</b>: In the import declaration, for
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<code>"database/mysql"</code>, read <code>"database/sql"</code>.
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(Thanks to Jose Colon Rodriguez, 2016-01-09. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.320, code display following ¶1</b>: The suggested test case
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does not exercise the unary plus operator, nor is
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the <code>eval</code> package qualifier appropriate:
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<pre>{"-x * -x", eval.Env{"x": 2}, "4"}</pre>
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It should read:
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<pre>{"+x * -x", Env{"x": 2}, "-4"}</pre>
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(Thanks to Shinji Dosaka, 2016-07-15. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.341, Exercise 12.7</b>: For "decoder" and
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"<code>json.Decoder</code>", read "encoder" and
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"<code>json.Encoder</code>", respectively.
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(Thanks to Yoshiki Shibata, 2016-08-27. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.347, Exercise 12.8</b>: For "like <code>json.Marshal</code>",
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read "like <code>json.Unmarshal</code>".
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(Thanks to chai2010, 2016-01-01. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.362</b>: The <code>gopl.io/ch13/bzip</code> program
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does not comply with the
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<a href='https://github.com/golang/proposal/blob/master/design/12416-cgo-pointers.md'>proposed rules for passing pointers between Go and C code</a>
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because the C function <code>bz2compress</code> temporarily stores a Go
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pointer (<code>in</code>) into the Go heap
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(the <code>bz_stream</code> variable).
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The <code>bz_stream</code> variable should be allocated, and
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explicitly freed after the call to
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<code>BZ2_bzCompressEnd</code>, by C functions.
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(Thanks to Joe Tsai, 2015-11-18. Corrected in the third printing.)
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</p>
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<p>
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<b>p.366, Exercise 13.3</b>: For <code>bzip2.writer</code>, read <code>bzip.writer</code>.
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(Thanks to Yoshiki Shibata, 2016-09-05. Corrected in the fourth printing.)
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</p>
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<p>
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<b>p.371</b>: For "flag, <code>go tool -bench</code>", read
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"flag, <code>go test -bench</code>", and similarly for the seven
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following items. (Thanks to Yutaka Kato, 2021-06-29.)
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</p>
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</body>
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</html>
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