Determine the data type of javascript (sample code)_javascript skills

1 Determine whether it is an array type

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< script type="text/javascript">
//var a=[0];
document.write(isArray(a),'
');
function isArray(obj){
return (typeof obj=='object')&&obj.constructor==Array;
}
//]]>
< /script>

2 Determine whether it is a string type

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3 Determine whether it is a numeric type

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5 Determine whether it is a function

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6 Determine whether it is an object

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