whitespace

Author: coke

doc/Language/101-basics.pod6

@@ -1,12 +1,12 @@
 =begin pod :tag<tutorial> :page-order<A00>
 
-=TITLE  Perl 6 Example P6-101 
+=TITLE  Perl 6 Example P6-101
 
-=SUBTITLE A basic introductory example of a Perl 6 program
+=SUBTITLE A basic introductory example of a Perl 6 program
 
 Perl originated as a programming language intended to gather and summarize
-information from text files.  It's still strong in text processing, but Perl 5
-is also a powerful general-purpose programming language.  Perl 6 is even better.
+information from text files.  It's still strong in text processing, but Perl 5
+is also a powerful general-purpose programming language.  Perl 6 is even better.
 
 Suppose that you host a table tennis tournament.  The referees tell you the
 results of each game in the format C<Player1 Player2 | 3:2>, which means
@@ -27,7 +27,7 @@ The input data (stored in a file called "scores.txt") looks like this:
 The first line is the list of players.  Every subsequent line records a result
 of a match.
 
-Here's one way to solve that problem in Perl 6:
+Here's one way to solve that problem in Perl 6:
 
 =begin code
 
@@ -75,13 +75,13 @@ This produces the output:
 
 =head3 X<C<v6>>
 
-Every Perl 6 program should begin with C<use v6;>. This line tells the compiler
+Every Perl 6 program should begin with C<use v6;>. This line tells the compiler
 which version of Perl the program expects. Should you accidentally run the file
-with Perl 5, you'll get a helpful error message.
+with Perl 5, you'll get a helpful error message.
 
 =head3 X<C<statement>>
 
-A Perl 6 program consists of zero or more statements. A I<statement> ends with
+A Perl 6 program consists of zero or more statements. A I<statement> ends with
 a semicolon or a curly bracket at the end of a line:
 
 =begin code
@@ -142,14 +142,14 @@ the argument provided to C<open>.
 =head3 X<C<array>>, X<C<method>> and X<C<invocant>>
 
 The right-hand side calls a I<method> --a named group of behavior-- named C<get>
-on the file handle stored in C<$file>.  The C<get> method reads and returns 
+on the file handle stored in C<$file>.  The C<get> method reads and returns
 one line from the file, removing the line ending.  If you print the contents of C<$file>
-after calling C<get>, you will see that the first line is no longer in there. C<words> is also a method, 
-called on the string returned from C<get>. C<words> decomposes its 
+after calling C<get>, you will see that the first line is no longer in there. C<words> is also a method,
+called on the string returned from C<get>. C<words> decomposes its
 I<invocant>--the string on which it operates--into a list of words, which
 here means strings separated by whitespace.
-It turns the single string C<'Beth Ana Charlie Dave'> into the list of 
-strings C<'Beth', 'Ana', 'Charlie', 'Dave'>. 
+It turns the single string C<'Beth Ana Charlie Dave'> into the list of
+strings C<'Beth', 'Ana', 'Charlie', 'Dave'>.
 
 Finally, this list gets
 stored in the array C<@names>.  The C<@> sigil marks the declared variable as
@@ -168,8 +168,8 @@ These two lines of code declare two hashes.  The C<%> sigil marks each
 variable as a C<Hash>.  A C<Hash> is an unordered collection of key-value
 pairs.  Other programming languages call that a I<hash table>,
 I<dictionary>, or I<map>.  You can query a hash table for the value that
-corresponds to a certain C<$key> with C<%hash{$key}>N<Unlike Perl 5, in
-Perl 6 the sigil does not change when accessing an array or hash with
+corresponds to a certain C<$key> with C<%hash{$key}>N<Unlike Perl 5, in
+Perl 6 the sigil does not change when accessing an array or hash with
 C<[ ]> or C<{ }>. This is called X<I<sigil invariance>>.>.
 
 In the score counting program, C<%matches> stores the number of matches each
@@ -319,7 +319,7 @@ are passed in through the I<topic variable> C<$_>.
 
 You have seen blocks before: both the C<for> loop C<< -> $line { ... } >> and
 the C<if> statement worked on blocks.  A block is a self-contained piece of
-Perl 6 code with an optional signature (the C<< -> $line >> part).  See
+Perl 6 code with an optional signature (the C<< -> $line >> part).  See
 A<sec:signatures> for more information.
 
 The simplest way to sort the players by score would be C<@names.sort({
@@ -332,7 +332,7 @@ tournament.
 
 When two array items have the same value, C<sort> leaves them in the same order
 as it found them.  Computer scientists call this a I<stable sort>. The program
-takes advantage of this property of Perl 6's C<sort> to achieve the goal by
+takes advantage of this property of Perl 6's C<sort> to achieve the goal by
 sorting twice: first by the number of sets won (the secondary criterion), then
 by the number of matches won.
 
@@ -382,7 +382,7 @@ not interpolate:
 
 =end code
 
-Double quoted strings in Perl 6 can interpolate variables with the C<$>
+Double quoted strings in Perl 6 can interpolate variables with the C<$>
 sigil as well as blocks of code in curly braces. Since any arbitrary
 Perl code can appear within curly braces, C<Array>s and C<Hash>es may be
 interpolated by placing them within curly braces.
@@ -394,12 +394,12 @@ item. Hashes within curly braces are interpolated as a series of
 lines. Each line will contain a key, followed by a tab character, then
 the value associated with that key, and finally a newline.
 
-Let's see an example of this now. 
+Let's see an example of this now.
 
 In this example, you will see some special syntax that makes it easier
 to make a list of strings. This is the C<< <...> >> L<quote-words|https://docs.perl6.org/language/operators#index-entry-qw-quote-words-quote-words> construct.
 When you put words in between the < and > they are all assumed to be strings,
-so you do not need to wrap them each in double quotes C<< "..." >>. 
+so you do not need to wrap them each in double quotes C<< "..." >>.
 
 =begin code
 
@@ -474,7 +474,7 @@ B<2.> Instead of deleting the redundant C<@names> variable, you can also use it
 player appears that wasn't mentioned in the first line, for example due to a
 typo. How would you modify your program to achieve that?
 
-Hint: Try using L<membership operators|https://docs.perl6.org/routine/(elem)>. 
+Hint: Try using L<membership operators|https://docs.perl6.org/routine/(elem)>.
 
 B<Answer:> Change C<@names> to C<@valid-players>. When looping through the lines of
 the file, check to see that C<$p1> and C<$p2> are in C<@valid-players>. Note that