The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".
The following errata were submitted by our customers and approved as valid errors by the author or editor.
| Version |
Location |
Description |
Submitted By |
Date Submitted |
Date Corrected |
| Printed |
Page 11
The backquotes/backtics are backwards. The line |
$uptime = '/usr/ucb/uptime';
should be:
$uptime = `/usr/ucb/uptime`;
|
Anonymous |
|
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| Printed |
Page 11
The backquotes/backtics are backwards. The line |
$uptime = '/usr/ucb/uptime';
should be:
$uptime = `/usr/ucb/uptime`;
|
Anonymous |
|
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| Printed |
Page 20
The lines |
$host_address = "bu.edu";
$ip_address = "128.197";
should read:
$host_address = 'bu.edu';
$ip_address = '128.197';
We need single quotes to preserve the backslashes.
|
Anonymous |
|
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| Printed |
Page 20
The lines |
$host_address = "bu.edu";
$ip_address = "128.197";
should read:
$host_address = 'bu.edu';
$ip_address = '128.197';
We need single quotes to preserve the backslashes.
|
Anonymous |
|
|
| Printed |
Page 45
The backquotes/backtics are backwards. The line |
$uptime = '/usr/ucb/uptime';
should be:
$uptime = `/usr/ucb/uptime`;
|
Anonymous |
|
|
| Printed |
Page 45
The backquotes/backtics are backwards. The line |
$uptime = '/usr/ucb/uptime';
should be:
$uptime = `/usr/ucb/uptime`;
|
Anonymous |
|
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| Printed |
Page 46
|
The line of code now reads:
chop ($current_date = '/bin/date');
It should read:
chop ($current_date = `/bin/date`);
|
Anonymous |
|
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| Printed |
Page 46
|
The line of code now reads:
chop ($current_date = '/bin/date');
It should read:
chop ($current_date = `/bin/date`);
|
Anonymous |
|
|
| Printed |
Page 54
The query information |
install.x=250&install_y=20
should be:
install.x=250&install.y=20
|
Anonymous |
|
|
| Printed |
Page 54
The query information |
install.x=250&install_y=20
should be:
install.x=250&install.y=20
|
Anonymous |
|
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| Printed |
Page 64
code 1: | meet you ", should be |
|
Anonymous |
|
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| Printed |
Page 64
code 1: | meet you ", should be |
|
Anonymous |
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| Printed |
Page 65
The "simple_data" on the third line of the first paragraph should |
be "simple_form" instead.
|
Anonymous |
|
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| Printed |
Page 65
The "simple_data" on the third line of the first paragraph should |
be "simple_form" instead.
|
Anonymous |
|
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| Printed |
Page 66
The second sentence of the page ("The result is ... into the |
array.") should read as follows:
The result is to fill the array key_value_pairs with entries
in the form of "key=value".
|
Anonymous |
|
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| Printed |
Page 66
The second sentence of the page ("The result is ... into the |
array.") should read as follows:
The result is to fill the array key_value_pairs with entries
in the form of "key=value".
|
Anonymous |
|
|
| Printed |
Page 75
The line |
printf("Unrecognized method
", cgi->request_method);
should read:
printf("Unrecognized method: %s
", cgi->request_method);
|
Anonymous |
|
|
| Printed |
Page 75
The line |
printf("Unrecognized method
", cgi->request_method);
should read:
printf("Unrecognized method: %s
", cgi->request_method);
|
Anonymous |
|
|
| Printed |
Page 100
|
The first sentence reads:
"The %D format specifies that the date should be in dd/mm/yy
format..."
That's incorrect -- the %D format produces a date in mm/dd/yy format.
|
Anonymous |
|
|
| Printed |
Page 100
|
The second sentence reads:
"%r format specifies "hh/mm/yy AM|PM" format..."
It should read:
"%r format specifies "hh/mm/ss AM|PM" format..."
|
Anonymous |
|
|
| Printed |
Page 100
There are a few errors in the table. Here is the original table |
along with the corrections:
Format Value Example
------ ----- -------
%a Day of the week abbreviation Sun
%A Day of the week Sunday
%b Month name abbreviation (also %h) Jan
%B Month name January
%d Date 1 (NOT 01)
This is incorrect; %d actually returns "01" -- just the opposite
of what's stated.
%D Date as "%m/%d/%y" 06/23/95
%e Date 01
%e returns "1" and not "01". The %d and %e are mixed up.
%H 24-hour clock hour 13
%I 12-hour clock hour 1
%I returns the hour with a leading zero (i.e "01"). This explains
the leading zero in the example for %r.
%j Decimal day of the year 360
%m Month number 11
%M Minutes 08
%p AM | PM a.m.
%p returns am and pm as "AM" and "PM", respectively.
%r Time as "%I:%M:%S AM|PM" 07:17:39 PM
This is equivalent to: "%I:%M:%S %p"
%S Seconds 09
%T 24-hour time as "%H:%M:%S" 16:55:15
%U Week of the year 49
%w Day of the week number 05
%w returns the number WITHOUT a leading zero.
BTW, the information returned by %w is slightly confusing. It
returns the day of the week starting from Sunday (where Sunday
is day 0). For example, Sat, May 4 would be returned as 6.
%y Year of the century 95
%Y Year 1995
%Z Time zone EST
|
Anonymous |
|
|
| Printed |
Page 100
|
The first sentence reads:
"The %D format specifies that the date should be in dd/mm/yy
format..."
That's incorrect -- the %D format produces a date in mm/dd/yy format.
|
Anonymous |
|
|
| Printed |
Page 100
|
The second sentence reads:
"%r format specifies "hh/mm/yy AM|PM" format..."
It should read:
"%r format specifies "hh/mm/ss AM|PM" format..."
|
Anonymous |
|
|
| Printed |
Page 100
There are a few errors in the table. Here is the original table |
along with the corrections:
Format Value Example
------ ----- -------
%a Day of the week abbreviation Sun
%A Day of the week Sunday
%b Month name abbreviation (also %h) Jan
%B Month name January
%d Date 1 (NOT 01)
This is incorrect; %d actually returns "01" -- just the opposite
of what's stated.
%D Date as "%m/%d/%y" 06/23/95
%e Date 01
%e returns "1" and not "01". The %d and %e are mixed up.
%H 24-hour clock hour 13
%I 12-hour clock hour 1
%I returns the hour with a leading zero (i.e "01"). This explains
the leading zero in the example for %r.
%j Decimal day of the year 360
%m Month number 11
%M Minutes 08
%p AM | PM a.m.
%p returns am and pm as "AM" and "PM", respectively.
%r Time as "%I:%M:%S AM|PM" 07:17:39 PM
This is equivalent to: "%I:%M:%S %p"
%S Seconds 09
%T 24-hour time as "%H:%M:%S" 16:55:15
%U Week of the year 49
%w Day of the week number 05
%w returns the number WITHOUT a leading zero.
BTW, the information returned by %w is slightly confusing. It
returns the day of the week starting from Sunday (where Sunday
is day 0). For example, Sat, May 4 would be returned as 6.
%y Year of the century 95
%Y Year 1995
%Z Time zone EST
|
Anonymous |
|
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| Printed |
Page 133
The while loop is missing a matching brace in the text. However, |
it exists in the online examples:
while (<FILE>){
if (m|[d+/w+/d+:([^:]+)|) {
$time[$1]++;
}
}
|
Anonymous |
|
|
| Printed |
Page 133
The while loop is missing a matching brace in the text. However, |
it exists in the online examples:
while (<FILE>){
if (m|[d+/w+/d+:([^:]+)|) {
$time[$1]++;
}
}
|
Anonymous |
|
|
| Printed |
Page 159
'Percentage' mentioned at various points - use of this term is |
|
Anonymous |
|
|
| Printed |
Page 159
'Percentage' mentioned at various points - use of this term is |
|
Anonymous |
|
|
| Printed |
Page 162
line 29: 'Each element of the slices array is modified to |
contain the percentage value...' Not stricly correct: it is a
'normalised' value, not a 'percentage'.
|
Anonymous |
|
|
| Printed |
Page 162
line 29: 'Each element of the slices array is modified to |
contain the percentage value...' Not stricly correct: it is a
'normalised' value, not a 'percentage'.
|
Anonymous |
|
|
| Printed |
Page 201
1st para, line 2: changed "way" to "ways" |
|
Anonymous |
|
Jan 01, 1998 |
| Printed |
Page 201
1st para, line 2: changed "way" to "ways" |
|
Anonymous |
|
Jan 01, 1998 |
| Printed |
Page 250
line 3: "Fah" should be "FaH" |
|
Anonymous |
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| Printed |
Page 250
line 3: "Fah" should be "FaH" |
|
Anonymous |
|
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| Printed |
Page 255
The fgrep used in the example is GNU fgrep version 2.0 which |
supports the -A and -B options.
|
Anonymous |
|
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| Printed |
Page 255
The fgrep used in the example is GNU fgrep version 2.0 which |
supports the -A and -B options.
|
Anonymous |
|
|
| Printed |
Page 265
The line |
chop ($hostname = `bin/hostname`);
should read:
chop ($hostname = `/bin/hostname`);
|
Anonymous |
|
|
| Printed |
Page 265
The line |
chop ($hostname = `bin/hostname`);
should read:
chop ($hostname = `/bin/hostname`);
|
Anonymous |
|
|
| Printed |
Page 269
The word "posses" should be "possess" on the 6th line of the |
|
Anonymous |
|
|
| Printed |
Page 269
The word "posses" should be "possess" on the 6th line of the |
|
Anonymous |
|
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| Printed |
Page 306
In the second question, "Perl CGI rogram" should be "Perl CGI |
|
Anonymous |
|
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| Printed |
Page 306
In the second question, "Perl CGI rogram" should be "Perl CGI |
|
Anonymous |
|
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| Printed |
Page 326
Modern versions of the NCSA HTTPd server no longer use the |
imagemap.conf file. You can pass the map file as extra path
information to the imagemap program directly, like so:
<A HREF="/cgi-bin/imagemap/graphics/dragon.map">
<IMG SRC="/graphics/dragon.gif" ISMAP></A>
where the map file (dragon.map) is stored in the /graphics
directory. Note that this is a virtual path.
|
Anonymous |
|
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| Printed |
Page 326
Modern versions of the NCSA HTTPd server no longer use the |
imagemap.conf file. You can pass the map file as extra path
information to the imagemap program directly, like so:
<A HREF="/cgi-bin/imagemap/graphics/dragon.map">
<IMG SRC="/graphics/dragon.gif" ISMAP></A>
where the map file (dragon.map) is stored in the /graphics
directory. Note that this is a virtual path.
|
Anonymous |
|
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| Printed |
Page 368
The line |
% chmod 711 clock.pl
should be:
% chmod 755 clock.pl
|
Anonymous |
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| Printed |
Page 368
The line |
% chmod 711 clock.pl
should be:
% chmod 755 clock.pl
|
Anonymous |
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| Printed |
Page 369
In the first code snippet, the line |
|
Anonymous |
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| Printed |
Page 369
In the first code snippet, the line |
|
Anonymous |
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| Printed |
Page 374
'Server Simulation' section: 'setenv REQUEST_METHOD ...' line is |
|
Anonymous |
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| Printed |
Page 374
'Server Simulation' section: 'setenv REQUEST_METHOD ...' line is |
|
Anonymous |
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| Printed |
Page 385
There is an extraneous closing paren after "Special Edition |
|
Anonymous |
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| Printed |
Page 385
There is an extraneous closing paren after "Special Edition |
|
Anonymous |
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| Printed |
Page 402
On Line 12: '/p..l/' 'l' wrong font (should be Roman) |
|
Anonymous |
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| Printed |
Page 402
On Line 12: '/p..l/' 'l' wrong font (should be Roman) |
|
Anonymous |
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| Printed |
Page 417
|
4th line in list of URLs now reads:
ftp://ftp.iguide.com/pub/mirrors/packages/perl/CPAN/
|
Anonymous |
|
Jan 01, 1998 |
| Printed |
Page 417
|
4th line in list of URLs now reads:
ftp://ftp.iguide.com/pub/mirrors/packages/perl/CPAN/
|
Anonymous |
|
Jan 01, 1998 |
| Printed |
Page 421
|
{421} RFC 1341 has been replaced by RFC 1521.
|
Anonymous |
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| Printed |
Page 421
|
{421} RFC 1341 has been replaced by RFC 1521.
|
Anonymous |
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| Printed |
Page 436
added the following to the next-to-last para. |
Whenever possible, our books use RepKover?, a durable and flexible
lay-flat binding. If the page count exceeds RepKover's limit, perfect
binding is used.
|
Anonymous |
|
Jan 01, 1998 |
| Printed |
Page 436
added the following to the next-to-last para. |
Whenever possible, our books use RepKover?, a durable and flexible
lay-flat binding. If the page count exceeds RepKover's limit, perfect
binding is used.
|
Anonymous |
|
Jan 01, 1998 |
