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Exceptions
ML has functions hd and t1 to return the head (or ?rst element) and tail (or remaining elements) of a list. These both raise an exception Empty if the list is empty. Suppose that we rede?ne these functions without changing their behavior on nonempty lists, so that hd raises exception Hd and tl raises exception Tl if applied to the empty list nil: - hd(nil); uncaught exception Hd - tl(nil); uncaught exception Tl
Consider the function
fun g(l) = hd(l) : : tl(l) handle Hd => nil; that behaves like the identity function on lists. The result of evaluating g(nil) is nil. Explain why. What makes the function g return properly without handling the exception Tl?
Write a program to turn LED4 and LED1 ON. LED2 and LED3 must be OFF.
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For your initial post, provide your own description of what the computer considers "TRUE" and what the computer considers "FALSE." Then, provide at least two code examples (original examples) that would return TRUE, and provide a description of what ..
The CPU normally fetches and executes one 32-bit in- struction every 1 nsec. How much does the disk slow down the CPU?
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Discuss it with 1000 words. Web 2.0 encourages user participation, social interaction, and collaborating. Some of the technologies used are AJAX, Tagging, blogging, Wiki's, Really Simple Syndication (RSS), and podcast's and videocast's. AJAX al..
revise the solution to the balanced-braces problem so that the expression can contain three types of delimiters ( ), [ ], and { }: Thus {ab(c[d])e} is valid, but {ab(c))is not.
Identify all related tasks and resources needed to complete the scenario.
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