Null Articles

• /dev/null: Permission denied on Alpine Linux One of my Alpine Linux VMs broke during an upgrade and started throwing errors about the permissions on /dev/null. Just fixing the permissions didn’t persist across reboots, but resetting the device manager did.
• cfspreadsheet + GetTempFile() = NullPointerException In ColdFusion, CFspreadsheet expects to write to a .xls extension, not .tmp, so you have to make sure the name ends in .xls before you write to it.
• Groovy, null, and ‘null’ Sometimes you get a null value, and sometimes you get the word null. Make sure it checks the one you expect!
• Java/Groovy Overloading and Null Parameters When you overload a Java method to accept different types of parameters, it can’t always determine which to call when one of the inputs is null. Here’s a hacky workaround.

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