... Going all the way down to the basics for Map and Reduce. Map is a function which "transforms" items in some kind of list to another kind of item and put them back in the same kind of list. suppose I have a list of numbers: [1,2,3] and I want to double every number, ...

...y important as they provide a clearer, less error-prone method of escaping and quoting external data than manually escaping it with a separate function call. See the comparison of SQL extensions. share | ...

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