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Translates the section of "Hashes"
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@ -43,8 +43,8 @@ my $display = "You have $answer ${animal}s.\n";
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# 純量值可為字串、整數、浮點數。Perl 會自動地在需要之時進行轉換。
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# 純量值可為字串、整數、浮點數。Perl 會自動地在需要之時進行轉換。
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# 以單引號括住的字串內容與其字面之值完全相同。而以雙引號括住的字串,其中則能內插變數
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# 以單引號括住的字串內容與其字面之值完全相同。而以雙引號括住的字串,
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# 與像是表示換列的 "\n" 這種控制碼。
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# 其中則能內插變數與像是這種表示換列字符 "\n" 的控制碼。
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## 陣列
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## 陣列
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# 一個陣列,可以裝下很多值:
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# 一個陣列,可以裝下很多值:
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@ -55,12 +55,8 @@ my @mixed = ("camel", 42, 1.23);
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# 陣列元素的存取,需要角括號。前方的印記為 $ 符號,表示只取一個值。
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# 陣列元素的存取,需要角括號。前方的印記為 $ 符號,表示只取一個值。
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my $second = $animals[1];
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my $second = $animals[1];
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# The size of an array is retrieved by accessing the array in a scalar
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# context, such as assigning it to a scalar variable or using the
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# "scalar" operator.
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# 欲知陣列之大小,在純量語境之下使用陣列便可。例如,將陣列裝到一個純量變數中。
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# 欲知陣列之大小,在純量語境之下使用陣列便可。例如,將陣列裝到一個純量變數中。
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# 又或者是使用 scalar 算符。
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# 又或者是使用 "scalar" 算符。
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my $num_animals = @animals;
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my $num_animals = @animals;
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print "Number of numbers: ", scalar(@numbers), "\n";
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print "Number of numbers: ", scalar(@numbers), "\n";
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@ -76,29 +72,27 @@ my @example = ('secret', 'array');
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my $oops_email = "foo@example.com"; # 'foosecret array.com'
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my $oops_email = "foo@example.com"; # 'foosecret array.com'
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my $ok_email = 'foo@example.com';
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my $ok_email = 'foo@example.com';
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## Hashes
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## 雜湊
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# A hash represents a set of key/value pairs:
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# 一個雜湊,能裝下許多對的鍵與值:
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my %fruit_color = ("apple", "red", "banana", "yellow");
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my %fruit_color = ("apple", "red", "banana", "yellow");
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# You can use whitespace and the "=>" operator to lay them out more
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# 善用空白與 "=>" 算符,就能將其排得得好看一些:
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# nicely:
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my %fruit_color = (
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my %fruit_color = (
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apple => "red",
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apple => "red",
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banana => "yellow",
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banana => "yellow",
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);
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);
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# Hash elements are accessed using curly braces, again with the $ sigil.
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# 雜湊元素的存取,需要大括號。前方的印記仍為 $ 符號,表示只取一個值。
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my $color = $fruit_color{apple};
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my $color = $fruit_color{apple};
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# All of the keys or values that exist in a hash can be accessed using
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# 以 "keys" 與 "values" 兩個函數,則可一次取得雜湊中的所有鍵、所有值。
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# the "keys" and "values" functions.
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my @fruits = keys %fruit_color;
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my @fruits = keys %fruit_color;
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my @colors = values %fruit_color;
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my @colors = values %fruit_color;
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# Scalars, arrays and hashes are documented more fully in perldata.
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# 關於純量、陣列、雜湊,在 perldata 文件之中,有更完整的描述。
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# (perldoc perldata).
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# (perldoc perldata)
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#### References
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#### References
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