The Yahoo Global Object includes several useful type-checking methods in the YAHOO.lang object. Click the Check button in each row to evaluate the data.
| Data | isObject | isArray | isFunction |
|---|---|---|---|
null |
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[] or new Array() |
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{} or new Object() |
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function Foo() {} |
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new Foo() |
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elem.getElementsByTagName('p') |
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YAHOO.util.Dom.
getElementsByClassName( |
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