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What is the best way to remove null items from a list in Groovy?
ex: [null, 30, null]
want to return: [30]
778
Using List. To remove all null occurrences from the list, we can continuously call remove(null) until all null values are removed. Please note that the list will remain unchanged if it does not contain any null value.
In Groovy, there is a subtle difference between a variable whose value is null and a variable whose value is the empty string. The value null represents the absence of any object, while the empty string is an object of type String with zero characters. If you try to compare the two, they are not the same.
Just use minus:
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