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add a paragraph about semicolons to the tutorial.

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fix a typo caught by kakugawa@gmail.com

Fixes #92.

R=rsc
CC=golang-dev
https://golang.org/cl/152105
This commit is contained in:
Rob Pike 2009-11-12 14:10:16 -08:00
parent 454c621d91
commit 9549eeecd1
4 changed files with 25 additions and 3 deletions
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2
doc/go_spec.html
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@ -2300,7 +2300,7 @@ var r, ok = a[x]
<p>
the result of the index expression is a pair of values with types
<code>(K, bool)</code>.
<code>(V, bool)</code>.
If the key is present in the map,
the expression returns the pair <code>(a[x], true)</code>;
otherwise it returns <code>(Z, false)</code> where <code>Z</code> is

13
doc/go_tutorial.html
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@ -110,7 +110,7 @@ Next up, here's a version of the Unix utility <code>echo(1)</code>:
23 if i &gt; 0 {
24 s += Space
25 }
26 s += flag.Arg(i)
26 s += flag.Arg(i);
27 }
28 if !*omitNewline {
29 s += Newline
@ -135,6 +135,17 @@ Semicolons aren't needed here; in fact, semicolons are unnecessary after any
top-level declaration, although they are needed as separators <i>within</i>
a parenthesized list of declarations.
<p>
You can use semicolons just the way you would in C, C++, or Java, but if you
prefer you can also leave them out in many cases. They <i>separate</i> statements
rather than terminate them, so they aren't needed (but are still OK) at the end of the last
statement in a block.
They're also optional after braces, as in C.
Have a look at the source to <code>echo</code>.
The only necessary semicolons in that program are on lines 8, 15, and 21
and of course between the elements of the <code>for</code> loop on line 22.
The ones on line 9, 16, 26, and 31 are optional but are there because a semicolon
on the end of a list of statements makes it easier to edit the list later.
<p>
This program imports the <code>&quot;os&quot;</code> package to access its <code>Stdout</code> variable, of type
<code>*os.File</code>. The <code>import</code> statement is actually a declaration: in its general form,
as used in our ``hello world'' program,

11
doc/go_tutorial.txt
View File

@ -94,6 +94,17 @@ Semicolons aren't needed here; in fact, semicolons are unnecessary after any
top-level declaration, although they are needed as separators <i>within</i>
a parenthesized list of declarations.
You can use semicolons just the way you would in C, C++, or Java, but if you
prefer you can also leave them out in many cases. They <i>separate</i> statements
rather than terminate them, so they aren't needed (but are still OK) at the end of the last
statement in a block.
They're also optional after braces, as in C.
Have a look at the source to "echo".
The only necessary semicolons in that program are on lines 8, 15, and 21
and of course between the elements of the "for" loop on line 22.
The ones on line 9, 16, 26, and 31 are optional but are there because a semicolon
on the end of a list of statements makes it easier to edit the list later.
This program imports the "&quot;os&quot;" package to access its "Stdout" variable, of type
"*os.File". The "import" statement is actually a declaration: in its general form,
as used in our ``hello world'' program,

2
doc/progs/echo.go
View File

@ -23,7 +23,7 @@ func main() {
if i > 0 {
s += Space
}
s += flag.Arg(i)
s += flag.Arg(i);
}
if !*omitNewline {
s += Newline