A stream pipeline consists of a source stream followed by zero or more intermediate operations and one terminal operation. Each intermediate operation transforms the stream in some way, such as mapping each element to a function of that element or filtering out all elements that do not satisfy some condition. Intermediate operations all transform one stream into another, whose element type may be the same as the input stream or different from it. The terminal operation performs a final computation on the stream resulting from the last intermediate operation, such as storing its elements into a
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