query: NullPointerException while checking if array is empty
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positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 128709
negative_passages.text: Why is there a `null` value in JavaScript?
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negative_passages.text: NullPointerException when Creating an Array of objects
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negative_passages.text: Checking for null before ToString()
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negative_passages.text: Why is True returned when checking if an empty string is in another?
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negative_passages.text: What is null in Java?
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negative_passages.text: Easier way of writing null or empty?
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negative_passages.text: How to check for an undefined or null variable in JavaScript?
negative_passages.docid: 101561
negative_passages.text: Passing an empty array as default value of an optional parameter