With your emphasis of the word "modern", you seem to be implying that variable declaration is old-fashioned and it is more modern to auto-declare them.

However, the opposite is true. Javascript introduced a strict mode in ECMAScript 5, with variable declarations required, and its use is increasingly being encouraged.

The various varieties of Visual Basic (VB.NET, VBA, etc) have "Option Explicit" which forces you to declare variables before using them. Microsoft's documentation for the language says "Setting Option Explicit to Off is generally not a good practice".

toby döt ink

In reply to Re: A short whishlist of Perl5 improvements leaping to Perl7 by tobyink
in thread A short whishlist of Perl5 improvements leaping to Perl7 by rsFalse

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.