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4.1: Syntactic Sugar

  • Page ID
    49275
  • \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)

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    Occasionally throughout this book we'll introduce an abbreviation that will allow us to write, and you to read, less pseudocode. For now, we'll introduce an easier way to compare iterators and a specialized loop for traversing sequences.

    Instead of using the equal() method to compare iterators, we'll overload the == operator. To be precise, the following two expressions are equivalent:

    iter1.equal(iter2)
    iter1 == iter2
    

    Second, we'll use the for keyword to express list traversal. The following two blocks are equivalent:

    var iter:List Iterator<item-type> := list.get-begin()
    while(not iter == list.get-end())
     operations on iter
     iter.move-next()
    end while
    
    for iter in list
     operations on iter
    end for
    

    This page titled 4.1: Syntactic Sugar is shared under a CC BY-SA license and was authored, remixed, and/or curated by Wikibooks - Data Structures (Wikipedia) .

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