Empty string: Difference between revisions
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→{{header|Sidef}}: minor code correction
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=={{header|Sidef}}==
Create an empty string:
<lang ruby>var s = "";
var s = String.new;</lang>
These expressions all evaluate to true to determine emptiness:
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s.is_empty;
s ~~ /^\z/;
s ~~ /\A\z/
Non-empty expressions, in addition to simply negating the above expressions:
<lang ruby>s
s.length?;
s.length > 0;
s ~~ /./s;
s
=={{header|Smalltalk}}==
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