Tutoring programming, you encounter all kinds of instances. The tutor mentions, with Perl, incrementing a counter variable in a for loop by a decimal amount. Can you increment a counter variable by a decimal amount? In my experience, with Perl, …
Perl programming: can you increment a counter variable by a decimal? Read more »
Tutoring computer science, character operations with ASCII surface. The tutor mentions Perl’s chr() function. The common English characters one might imagine all have ASCII codes. Tab is 9, Newline is 10, Space is 32, and from 33 to 126 are …
Computer science: Perl programming: chr() function Read more »
The tutor offers a few points of clarification. In yesterday’s post I showed a Perl program, called from the command line with the input value, to find the cube root of a number. Here are some points to help a …
Perl: some explanation of yesterday’s command-line cube root program Read more »
The tutor shows an example program with a few facets to discuss. So far as I know, to find the cube root in Perl, you need use the principle The following program calculates the cube root of a number given …
The tutor follows up on his post about the variable password checker. In my Nov 18 post I show a short script that checks a three-digit entry for a match with the pattern m[any character]m. The entry m4m is a …
The tutor shows off some of Perl’s pattern matching (aka regex) talents. Let’s imagine you have a laptop you share with a friend for project work. They’re not million-dollar secrets you’re keeping, but on the other hand, you don’t want …
Perl: a password (sort of) using regular expression (regex) power Read more »
According to Perl, an idea can push into your head, then pop out. For previous information about arrays, just search this site. You may want to start here. For information about getting Perl up and running on your computer, try …
The tutor brings up a neat Perl utility that you often see used in discussions between programmers. There are many articles on this site about arrays. To a newcomer, one that might be helpful is here. The point of today’s …
By way of finding a power of a number the tutor opens a discussion about algorithms. Years ago my computer science professor presented the following definition: An algorithm is a set of steps to solve a problem. Suppose there wasn’t …
The tutor offers a simple script to demonstrate the Perl range operator. Let’s imagine someone is studying radicals (which you’ll find numerous posts about here, by typing it in the search box). They want to memorize the perfect squares; a …