Empty string: Difference between revisions
Content added Content deleted
(Ruby: Let the regular expressions work when string contains newlines "\n".) |
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s.empty? |
s.empty? |
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s.length == 0 |
s.length == 0 |
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s[/ |
s[/\A\z/] |
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# also silly things like |
# also silly things like |
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| Line 746: | Line 746: | ||
<lang ruby>s != "" |
<lang ruby>s != "" |
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s.length > 0 |
s.length > 0 |
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s[/./]</lang> |
s[/./m]</lang> |
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Note that we can '''not''' do the following, because the empty string is equivalent to true in Ruby ([[Boolean values#Ruby]]): |
Note that we can '''not''' do the following, because the empty string is equivalent to true in Ruby ([[Boolean values#Ruby]]): |
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<lang ruby>if s then puts "not empty" end</lang> |
<lang ruby>if s then puts "not empty" end # This code is wrong!</lang> |
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=={{header|Run BASIC}}== |
=={{header|Run BASIC}}== |
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<lang runbasic>var$ = "" |
<lang runbasic>var$ = "" |
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