![]() ![]() I experimented a bit with the various values, but could not get them high enough to show how running out of memory impacts the behavior of the functions.įor now the conclusion is that I still have not found any case where rolling your manual reverse would be beneficial. I am actually surprised that it is only twice as fast. The built-in reverse is about twice as fast as the home-made iteration. My ($length, $size, $count) = "USAGE: $0 LENGTH SIZE COUNT\n" if not $count įor a very short list with very short strings we need 1,000,000 iterations make the clock move. The timethese function will let us know if it thinks the number of iteration for the specific functions is too low to measure accurately. The higher the number of times we run the functions, the more accurate the measurement will be. Third number is the number of times we repeat the experiment. The multiplication of the first two numbers gives the approximate value for the size of the memory used for a single copy of the array. The third is the number of times we would like timethese to run each function. So, for each of the keys in the hash (sorted in alphanumeric order), you would print the key name, followed by a space and a tab, followed by the contents of the arrayref (tab-separated) which is the has value for that key, followed by newline. The second is the size of the array we create, the number of elements. The first one is the length of the strings we create. The strings, just the loop, I've replaced each say statement by an assignment. As I did not want to measure the time it takes to print ![]() To run each function many times and then compare the results. Then I used the timethese function of the Benchmark module Probably check which one of the above two versions is faster?įor that I created a separate implementation in which each one of the above Though I don't remember ever encountering such a situation.Īnyway, if we already implement our own reverse printing code then we should That doubling them would not fit in the memory of the computer. This could be useful if you have so many elements using greater-than instead of greater-than-or-equal in the condition),Īnd it is unclear why the author did not use the reverse function. This code is a bit longer, one can easily make off-by-one errors Largest index till 0 printing each element. It can be interpreted by using some formats and specified to the outputs. Instead of reversing the list of elements in the array, weĬould use the index of each element and count down from the The Perl printf is defined as the function that can be used for to print the list of values. Somewhere in the memory without connecting it to some variable name This still first reverses the array, create an reversed version of it Say join ' ', = reverse join ' ', the values in reversed order Reverse the values and store them in another array. Given an array of strings we can print the elements in reverse order in a number of ways: ![]()
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