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Index: O

• object-oriented (OO) developing: Object-Oriented Developing
• octal literals: Nondecimal Integer Literals
• OO (object-oriented) developing: Object-Oriented Developing
• open function: Fixed-length Random-access Databases
• open operator: Opening a Filehandle
• opendir operator: Directory Handles
• operator: Getting User Input
• • context and: <STDIN> in List Context
  • defined function and: The defined Function
  • while loop shortcut and: Input from Standard Input
• operator precedence (see precedence)
• operators
• • associativity and: Operator Precedence and Associativity
  • comparison: Comparison Operators
  • • Advanced Sorting
  • numeric: Numeric Operators
  • overload module for: Operator Overloading
  • perlfunc manpage and: Other Operators and Functions
  • perlop manpage and: Other Operators and Functions
  • precedence and: Operator Precedence and Associativity
• option modifiers: Option Modifiers
• OR operator (||): Logical Operators
• • Control Structures Using Partial-Evaluation Operators
  • die function and: Fatal Errors with die
• output: Output to Standard Output
• • buffered: Output to Standard Output
  • capturing using backquotes: Using Backquotes to Capture Output
  • formatted with printf function: Formatted Output with printf
• overload module: Operator Overloading