Oracle Tutoring, Campbell River, BC
(250) 203-6544 (text) or (250) 830-0295 (talk)
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 …
Self-tutoring about virtual machines, or VMs: the tutor explains some advantages of them. Virtual means it doesn’t exist in a physical sense, yet it can be thought of, or used, as if it does. In computer science, a virtual machine …
Self-tutoring about JavaScript: the tutor continues about objects and the prototype connection. It’s my understanding that in “old” JavaScript, you could have objects but they were defined using a constructor function, such as function theObj(the_name){ this.name=the_name; } var myObj=new theObj(‘Smedley’); …
Self-tutoring about JavaScript: the tutor begins about its prototype concept. Whether JavaScript has always been truly object-oriented I will discuss over a few posts. Suffice it to say it’s changed a lot over the years to become more similar, syntactically, …
Self-tutoring about JavaScript: the tutor mentions the object window.location JavaScript has the window.location object, which contains information about the current page open in the browser. For instance, window.location.origin will give the url of the current page. Source: w3schools.com