Oracle Tutoring, Campbell River, BC
(250) 203-6544 (text) or (250) 830-0295 (talk)
Tutoring computer science, terms arise. The tutor mentions memoization. Let’s imagine a function called F1. Let’s further imagine that F1 uses a lot of resources – calls to it take a lot of computation power. In such a situation, you …
Tutoring computer science, terms are important. The tutor mentions type parameter. The motivation for a type parameter is easiest to imagine with a strongly typed language like Java. Typically, such a language insists on knowing the type of an argument …
Tutoring computer science, static methods can arise. The specific language does provide meaningful context in how a programmer perceives static methods. However, the general idea is that a static method can be invoked from the class itself rather than needing …
Tutoring computer science, its own terms arise. The tutor mentions code motion. Code motion refers to evaluating a sentry value once, outside a loop, then storing the value in a variable which will be used for the test in the …
Self-tutoring about programming: the tutor mentions a difference between Python and JavaScript he’s noticed. With Python, if you want to continue to the next line (perhaps for easier reading), it seems a backslash, then Return, will work: the_var= (3 + …
Programming: newline in rhs expression: Python vs JavaScript Read more »
Tutoring comp sci, casting will come up: the tutor defines it. Casting, in computer science, means changing a variable’s type to a different one. Typically, the result will be stored in a new variable. An example where casting might be …
Self-tutoring about regex: the tutor mentions the newline in a detection pattern. In PHP regex, \n means ‘newline’. Therefore, $pat=’/\n/’; will be found in a string containing a newline. Source: w3schools.com
Self-tutoring about PHP and regular expressions: the tutor looks into whether hyphen is a word character. From time to time I wonder about this — I think I knew but have forgotten. Anyway, I’ve checked today and it seems that …
Self-tutoring about SQL Server: the tutor mentions a potential peculiarity. Let’s imagine there’s a trigger that updates a row just inserted. Performing an insert on such a table today, I got the message Query succeeded: Affected rows: 2 Yet, to …
Self-tutoring about the SQL Server query editor: the tutor mentions a hint. I defined a function, but then couldn’t find it. I wondered – was it even defined, or had I accidentally deleted it somehow? The command exec sp_helptext function_name …