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Why doesn't checkStatus have parenthesis when invoked?
Why doesn't Guil include () when passing checkStatus inside .then()? When do you and when do you not use () in front of a function name when calling that function?
Steven Parker228,978 Points
You always use parentheses when calling a function, but in the example you mention it is not being called but is being passed as an argument (commonly known as a "callback").
The actual invocation will occur at a later time (controlled by the "then").