Empty string: Difference between revisions
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s.each_char.to_a.empty?</lang> |
s.each_char.to_a.empty?</lang> |
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Non-empty expressions: |
Non-empty expressions, in addition to simply negating the above expressions: |
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<lang ruby>s != "" |
<lang ruby>s != "" |
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s.length > 0 |
s.length > 0 |
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s[/./]</lang> |
s[/./]</lang> |
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Note that we |
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</lang> |
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