Null object: Difference between revisions
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<lang AutoHotkey>If (object == null) |
<lang AutoHotkey>If (object == null) |
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MsgBox, object is null</lang> |
MsgBox, object is null</lang> |
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=={{header|AWK}}== |
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Undefined elements correspond to an empty string; when converted to a numerical value, it evaluates to 0. In order to distinguish a undefined value from a value of 0, length(var) need to be used. |
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<lang AWK>#!/usr/bin/awk -f |
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BEGIN { |
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b=0; |
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print "<"b,length(b)">" |
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print "<"u,length(u)">" |
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print "<"u+0,length(u+0)">"; |
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}</lang> |
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Output |
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<pre><0 1> |
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< 0> |
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<0 1></pre> |
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=={{header|Babel}}== |
=={{header|Babel}}== |