Ok this is more of a computer science question, than a question based on a particular language, but is there a difference between a map operation and a foreach operation? Or are they simply different names for the same thing?
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Ok this is more of a computer science question, than a question based on a particular language, but is there a difference between a map operation and a foreach operation? Or are they simply different names for the same thing?
Different.
foreach iterates over a list and performs some operation with side effects to each list member (such as saving each one to the database for example)
map iterates over a list, creates a transformed element for each member of that list, and returns another list of the same size with the transformed elements (such as converting a list of strings to uppercase)