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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ## 問題 你想檢查某個值的類型是否為`Array`。 ~~~ myArray = [] console.log typeof myArray // outputs 'object' ~~~ `typeof`用在數組上時,輸出的結果是錯誤的。 ## 方法 使用如下的代碼: ~~~ typeIsArray = Array.isArray || ( value ) -> return {}.toString.call( value ) is '[object Array]' ~~~ 如下調用`typeIsArray`就行: ~~~ myArray = [] typeIsArray myArray // outputs true ~~~ ## 詳解 上面的方法摘自“the Miller Device”。還可以使用Douglas Crockford的這段代碼: ~~~ typeIsArray = ( value ) -> value and typeof value is 'object' and value instanceof Array and typeof value.length is 'number' and typeof value.splice is 'function' and not ( value.propertyIsEnumerable 'length' ) ~~~
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