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"nei" stands for "Not Equal, ignoring case".
"nei" takes two items from the stack, compares them and pushes back 1 (meaning: true) if they are the different or 0 (meaning: false) if they are the same. The comparison is performed without regard to the case of any letters in the strings.
It is an error to compare two values of different types: either both must integers or both must be strings.
lift(4) "HTTP" nei assert
The "nei" action was added to Rope in version 20051212.
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