diff options
Diffstat (limited to 'doc/syntax/miscellaneous.rdoc')
| -rw-r--r-- | doc/syntax/miscellaneous.rdoc | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/doc/syntax/miscellaneous.rdoc b/doc/syntax/miscellaneous.rdoc index 8f424f019f..d5691f8d60 100644 --- a/doc/syntax/miscellaneous.rdoc +++ b/doc/syntax/miscellaneous.rdoc @@ -10,16 +10,16 @@ most frequently used with <code>ruby -e</code>. == Indentation -Ruby does not require any indentation. Typically ruby programs are indented +Ruby does not require any indentation. Typically, ruby programs are indented two spaces. -If you run ruby with warnings enabled and have an indentation mis-match you +If you run ruby with warnings enabled and have an indentation mis-match, you will receive a warning. == +alias+ The +alias+ keyword is most frequently used to alias methods. When aliasing a -method you can use either its name or a symbol: +method, you can use either its name or a symbol: alias new_name old_name alias :new_name :old_name @@ -61,7 +61,7 @@ You may use +undef+ in any scope. See also Module#undef_method p defined?(RUBY_VERSION) # prints "constant" p defined?(1 + 1) # prints "method" -You don't need to use parenthesis with +defined?+ but they are recommended due +You don't need to use parenthesis with +defined?+, but they are recommended due to the {low precedence}[rdoc-ref:syntax/precedence.rdoc] of +defined?+. For example, if you wish to check if an instance variable exists and that the @@ -69,7 +69,7 @@ instance variable is zero: defined? @instance_variable && @instance_variable.zero? -This returns <code>"expression"</code> which is not what you want if the +This returns <code>"expression"</code>, which is not what you want if the instance variable is not defined. @instance_variable = 1 @@ -104,4 +104,3 @@ Here is an example one-liner that adds numbers from standard input or any files in the argument list: ruby -ne 'BEGIN { count = 0 }; END { puts count }; count += gets.to_i' - |