Perl Best Practices [Electronic resources] نسخه متنی

B.3. Chapter 4, Values and Expressions

• Use interpolating string delimiters only for strings that actually interpolate. [String Delimiters ]

• Don't use " or '' for an empty string. [Empty Strings ]

• Don't write one-character strings in visually ambiguous ways. [Single-Character Strings ]

• Use named character escapes instead of numeric escapes. [Escaped Characters ]

• Use named constants, but don't use constant. [Constants ]

• Don't pad decimal numbers with leading zeros. [Leading Zeros ]

• Use underscores to improve the readability of long numbers. [Long Numbers ]

• Lay out multiline strings over multiple lines. [Multiline Strings ]

• Use a heredoc when a multiline string exceeds two lines. [Here Documents ]

• Use a "theredoc" when a heredoc would compromise your indentation. [Heredoc Indentation ]

• Make every heredoc terminator a single uppercase identifier with a standard prefix. [Heredoc Terminators ]

• When introducing a heredoc, quote the terminator. [Heredoc Quoters ]

• Don't use barewords. [Barewords ]

• Reserve => for pairs. [Fat Commas ]

• Don't use commas to sequence statements. [Thin Commas ]

• Don't mix high- and low-precedence booleans. [Low-Precedence Operators ]

• Parenthesize every raw list. [Lists ]

• Use table-lookup to test for membership in lists of strings; use any( ) for membership of lists of anything else. [List Membership ]