Balík: liblexical-underscore-perl (0.004-1)

[ Zdroj: liblexical-underscore-perl  ]

access your caller's lexical underscore

Starting with Perl 5.10, it is possible to create a lexical version of the Perl default variable $_. Certain Perl constructs like the "given" keyword automatically use a lexical $_ rather than the global $_.

It is occasionallly useful for a sub to be able to access its caller's $_ variable regardless of whether it was lexical or not. The "(_)" sub prototype is the official way to do so, however there are sometimes disadvantages to this; in particular it can only appear as the final required argument in a prototype, and there is no way of the sub differentiating between an explicitly passed argument and $_.

lexical::underscore allows you to access your caller's lexical $_ variable as easily as:

 ${lexical::underscore()}

Značky: Software Development: Perl Development, Knižnice, Implementované v: Perl

Ostatné balíky súvisiace s balíkom liblexical-underscore-perl

• dep: libpadwalker-perl

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• dep: perl

  Practical Extraction and Report Language od Larryho Walla

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