Question

Many times, two or more different sequences of messages to collections will have the same effect. In each of the following, describe a sequence of messages that will have the same effect as the indicated message. a) implement reject: in terms of select: b) implement size in terms of inject:into: c) implement includes: in terms of inject:into:.

   Many times, two or more different sequences of messages to collections will have the same effect. In each of the following, describe a sequence of messages that will have the same effect as the indicated message.
a) implement reject: in terms of select:
b) implement size in terms of inject:into:
c) implement includes: in terms of inject:into:.

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A little Smalltalk

A little Smalltalk

Timothy Budd 1st Edition

Chapter 3, Problem 5

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a) To implement reject: in terms of select:, we can use the following sequence of messages: Show more…

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Many times, two or more different sequences of messages to collections will have the same effect. In each of the following, describe a sequence of messages that will have the same effect as the indicated message. a) implement reject: in terms of select: b) implement size in terms of inject:into: c) implement includes: in terms of inject:into:.

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