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update errata

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chai2010 2016-01-06 13:05:51 +08:00
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# 原文勘誤
**p.9, ¶2:** for "can compared", read "can be compared".
(Thanks to Antonio Macías Ojeda, 2015-10-22.)
**p.9, ¶2:** for "can compared", read "can be compared". (Thanks to Antonio Macías Ojeda, 2015-10-22. Corrected in the second printing.)
**p.13:** As printed, the <code>gopl.io/ch1/lissajous</code> program
is deterministic, not random. We've added the statement below to
the downloadable program so that it prints a pseudo-random image
each time it is run. (Thanks to Randall McPherson, 2015-10-19.)
**p.13:** As printed, the `gopl.io/ch1/lissajous` program is deterministic, not random. We've added the statement below to the downloadable program so that it prints a pseudo-random image each time it is run. (Thanks to Randall McPherson, 2015-10-19.)
`rand.Seed(time.Now().UTC().UnixNano())`
**p.15, ¶2:** For "inner loop", read "outer loop". (Thanks to Ralph Corderoy, 2015-11-28.)
**p.19, ¶2:** For "Go's libraries makes", read "Go's library makes". (Thanks to Victor Farazdagi, 2015-11-30.)
**p.40, ¶4:** For "value of the underlying type", read "value of an unnamed type with the same underlying type". (Thanks to Carlos Romero Brox, 2015-12-19.)
**p.40, ¶1:** The paragraph should end with a period, not a comma. (Thanks to Victor Farazdagi, 2015-11-30.)
**p.43, ¶3:** Import declarations are explained in §10.4, not §10.3. (Thanks to Peter Jurgensen, 2015-11-21.)
**p.52, ¶2:** for "an synonym", read "a synonym", twice.
**p.52, ¶2:** for "an synonym", read "a synonym", twice. (Corrected in the second printing.)
**p.52, ¶9:** for "The integer arithmetic operators", read "The arithmetic operators". (Thanks to Yoshiki Shibata, 2015-12-20.)
**p.68:** the table of UTF-8 encodings is missing a bit from each first byte.
The corrected table is shown below. (Thanks to Akshay Kumar, 2015-11-02.)
**p.68:** the table of UTF-8 encodings is missing a bit from each first byte. The corrected table is shown below. (Thanks to Akshay Kumar, 2015-11-02. Corrected in the second printing.)
```
0xxxxxxx runes 0?127 (ASCII)
110xxxxx 10xxxxxx 128?2047 (values <128 unused)
@ -30,27 +29,23 @@ The corrected table is shown below. (Thanks to Akshay Kumar, 2015-11-02.)
11110xxx 10xxxxxx 10xxxxxx 10xxxxxx 65536?0x10ffff (other values unused)
```
**p.74:** the comment in <code>gopl.io/ch3/printints</code> should say
`fmt.Sprint`, not `fmt.Sprintf`.
**p.73, ¶1:** For "a exercise", read "an exercise". (Thanks to vrajmohan, 2015-12-28.)
**p.74:** the comment in `gopl.io/ch3/printints` should say `fmt.Sprint`, not `fmt.Sprintf`. (Corrected in the second printing.)
**p.76:** the comment `// "time.Duration 5ms0s` should have a closing double-quotation mark.
**p.75, ¶4:** for "%u", read "%o". (Thanks to William Hannish, 2015-12-21.)
**p.76:** the comment `// "time.Duration 5ms0s` should have a closing double-quotation mark. (Corrected in the second printing.)
**p.79, ¶4:** "When an untyped constant is
assigned to a variable, as in the first statement below, or
appears on the right-hand side of a variable declaration with an
explicit type, as in the other three statements, ..." has it backwards:
the <i>first</i>
statement is a declaration; the other three are assignments.
(Thanks to Yoshiki Shibata, 2015-11-09.)
**p.79, ¶4:** "When an untyped constant is assigned to a variable, as in the first statement below, or
appears on the right-hand side of a variable declaration with an explicit type, as in the other three statements, ..." has it backwards: the <i>first</i> statement is a declaration; the other three are assignments. (Thanks to Yoshiki Shibata, 2015-11-09.)
**p.132, code display following ¶3:** the final comment should read:
`// compile error: can't assign func(int, int) int to func(int) int`
(Thanks to Toni Suter, 2015-11-21.)
**p.132, code display following ¶3:** the final comment should read: `// compile error: can't assign func(int, int) int to func(int) int` (Thanks to Toni Suter, 2015-11-21.)
**p.166, ¶2:** for "way", read "a way".
**p.200, TestEval function:** the format string in the final call to t.Errorf should format test.env with %v, not %s. (Thanks to Mitsuteru Sawa, 2015-12-07.)
**p.347, Exercise 12.8:** for "like json.Marshal", read "like json.Unmarshal". (Thanks to @chai2010, 2016-01-01.)
**p.362:** the `gopl.io/ch13/bzip` program does not comply with the [proposed rules for passing pointers between Go and C code](https://github.com/golang/proposal/blob/master/design/12416-cgo-pointers.md) because the C function `bz2compress` temporarily stores a Go pointer (in) into the Go heap (the `bz_stream` variable). The `bz_stream` variable should be allocated, and explicitly freed after the call to `BZ2_bzCompressEnd`, by C functions. (Thanks to Joe Tsai, 2015-11-18.)