Test whether an object is an object or an array

if(Object.prototype.toString.apply(arr) === '[object Array]') alert("Array")

Original Article

Find whether the given variable is an object,or is an Array?

function isArray(testObject) {
    return testObject && !(testObject.propertyIsEnumerable('length')) && typeof testObject === 'object' && typeof testObject.length === 'number';
}

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[tags]javascript,object,array,type[/tags]