You have read a text file containing whitespace separated columns of numbers. Each line may contain leading and trailing whitespace. You must iterate through the file and, for each line, capture the numbers in an array. The elements of the array must not contain leading or trailing space and there may be no empty elements.

Based on the scenario above, which split command might you use in your loop to meet the specification?

Choice 1

my @fields = split / /, $string;

[download]

Choice 2

my @fields = split /\s/, $string;

[download]

Choice 3

my @fields = split /\s+/, $string;

[download]

Choice 4

my @fields = split ' ', $string;

[download]

Choice 5

my @fields = split /\s*/, $string;

[download]

In reply to Question 1 by partha7

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.