Відео

So, you're off to university. Maybe you are thinking of going or maybe you have your place already - well done. But, studying at university is VERY different to your previous experience. This video explains why it is different, what is different and how you can succeed. It contains tips that no one tells you about, but that you REALLY need to know.

LYW (lyw4.life) is a free learning platform which looks at education differently. It is based on sound educational practice. It does not seek to replace the current educational system, but rather to allow students to learn their way and tutors to monitor and mentor. It takes a positive, can-do, view of education rather than stick-and-carrot. The syllabus can be split into small tasks

First, apologies for the quality of the sound on this video. These are the perils of filming outdoors. This is the most important topic when completing coursework and could get you banned from university for life. Plagiarism occurs when you pass off any work as original when it has come from somewhere else. There are three causes of plagiarism; copying from someone else, copying from some other...

Recursion can seem rather odd at first. This video explains how recursive functions work by showing you how to change a number from base 10 to any other base. The code used in this video is available at:- lyw4.life/Resources/python.php and scrolling down to topic 59. There is also the code for another program which find whether a string is in a list.

Recursion can seem rather odd at first. This video explains how recursive functions work by showing you how your calculator finds a square root by using the Newton-Raphson method. The code used in this video is available at:- lyw4.life/Resources/python.php and scrolling down to topic 58. There is also the code for another program which calculates the n'th root for those who are a little more ad...

This video explains the simplest form of recursion, a WHILE loop. You will see the terms "base case" and "recursive step" explained. This then sets you up for the next two videos on functional recursion.

This video shows a selection of techniques that the more professional programmers use to stop their programs from falling over - even when it is the user who has been silly.

There are three kinds of people who will try to break your program:- - Users (Evil) - Other programmers (Worse) - You (the worst of all) It is your job as a programmer to ensure that none of these people succeed.

This video shows how to ensure that any code which might cause an error knows what to do. In this way you can make your code crashproof. That is being professional.

This is a brief introduction to why you would want to use defensive programming. It is what differentiates the amature from the professional.

The problem when writing programs in a functional programming language, such as Scheme, is debugging. The trick is to create a logical plan that builds up the application as you go. Test each sub-command and each command. Create named functions - get them working - and then park them at the top of the program as you go. This technique may be slower than you would like, but it works. It also sav...

These three functions are VERY useful. They allow you to do things to a whole list in one go. Mapping does something (whatever you set it up to do) to every item in a list. It creates a new list altered in that way. Filtering creates a new list which only includes thos items which meet the criteria that you specify. Reducing takes a list and performs a function (such as add) on each item to cre...

Recursion is an odd concept. It is where a function calls itself. Obviously, this creates a loop (the only kind of loop there is in functional programming). For this to work, there has to be a way out - the base case. We therefore create a function (which here is called rec-step) which contains the command to be repeated. After testing that that works we create another function which calls itse...

This video looks at using IF statements and logic statements in your Scheme code. These allow you to make decisions about which functions are run. Apologies for the quality of sound in this video. I was trying out a different microphone. I would have re-recorded this, but I was quite pleased with the commentary - so this was the lesser of two evils. The code used in this video can be found via ...

09 - Compound Functions (Part 2)

09 - Compound Functions (Part 1)

08 - Lambda Functions

07 - Named Functions

06 - List Processing

05 - Creating Trees

04 - Creating Lists

03 - Style Matters and Materials

02 Installing Scheme and Racket

01 - What is Functional Programming

Python 040 - Using the place layout

Python 039 - Using the grid layout

Python 039 - Swapping between frames

Python 037 - Adding a menu bar

Python 038 - Using dialog boxes