Empty string: Difference between revisions
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(→{{header|jq}}: assignment to a variable) |
m (Added Sidef language) |
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# check that string is not empty |
# check that string is not empty |
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s <> ""</lang> |
s <> ""</lang> |
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=={{header|Sidef}}== |
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Create an empty string: |
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<lang ruby>s = ""; |
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s = String.new;</lang> |
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These expressions all evaluate to true to determine emptiness: |
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<lang ruby>s == ""; |
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s.length == 0; |
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s.is_empty; |
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/\A\z/.match(s)??;</lang> |
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Non-empty expressions, in addition to simply negating the above expressions: |
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<lang ruby>s != ""; |
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s.length?; |
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s.length > 0; |
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/./s.match(s)??;</lang> |
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=={{header|Smalltalk}}== |
=={{header|Smalltalk}}== |
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