A
asuzuki
Guest
Using toInteger may cause a null pointer exception because the data that the attribute to be integerized with toInteger needs to be a number. You can check with isInteger whether that the attribute holds is a number. On the other hand, toDecimal may also generate null Pointer exception in the same way. However, there is no rule operator to check the data possessed by the attribute to be decimal. I want an operator to check whether it is decimal type data like isInteger.
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