Topics by vegaseat

This simple key logger shows any character/special key when pressed.

The module pyglet leans on OpenGL for graphics and is used in the scientific community together with Python. This short code snippet shows you how to use it to display an animated GIF file. The download is free, so give it a try. You don't have to download OpenGL to …

Just a simple exploration of the goslate module (uses the Google Translate API) to translate some common languages. However, some IDE's create character problems. Note: Your computer has to be connected to the Internet to access Google.

The Swift computer language is the brainchild of a number of Apple associates. In my humble opinion it shows some nice features, but also some warts. Part 1 (constants, variables, strings, tuples, arrays) explores a number of the features to give you a taste of the language. I hope I …

Part 2 of exploring/tasting the Swift language takes a look at dictionaries; process flow controls like loops, if/else and switch/case; functions and sorting. I hope I can follow this up with part 3, a closer look at class operations.

In part 4 of tasting Swift, we explore structures. Swift has added some interesting features to structures like defaults, methods, multiple init(). This way struct objects come close to class objects with a little less overhead. As an option, methods can be added externally too. Take a look! Down the …

This is the updated version of the Tiny Tkinter Calculator. It has more power, since you can type in functions contained in the Python math module then press the equals key. You can then move the result into memory for other calculations. The code is written in OOP class style …

Like most modern languages Swift has sets and set operations. Here is a quick look. Coming in the fall of 2015 ... Swift2 replaces println() with just print() that has a newline default. The sort of thing that Python3 did to print(). There are some other syntax changes. Good news, …

The example shows how to establish a dictionary of (row, column):value pairs to mimic a two dimensional array. This can be easily expanded to more dimensions. Python3 has dictionary comprehension, making the process of creating a dictionary of this type easier.

Just a simple password creator using Python code. The length of the password can be set and the characterset could be changed if you so desire.

This is a test to get the Python snippets going! For those of you who are scared of snakes, the language is named after the TV program, not the snake. Python is an interpreted language, but programs to compile/combine the code to an exe file are available (Py2Exe). The latest …

Part 3 of the taste of Swift explores class objects in Apple's Swift language. A class allows you to group methods (class functions) together that belong together. Class Person groups some information of people working in an office. Class Pay inherits class Person and adds pay information. Class File groups …

The bubble sort is slow and I thought it would be interesting to visualize the progress as it sorts an array of integers.

Here lambda is used to create a one-line function for factorials.

A little experiment with custom sorting the result of a word frequency count using Google's Go language.

I have joined the thousands who have done it before, and have compared a number of sorting routines. The sorting is done on the same random-integer arrays. No surprises, quicksort wins this simple comparison hands down. There are clever combinations of sorting routines that are faster, like the snippet by …

Just a couple of number tricks to check Go's mathematical abilities. If you have more, let's show them here.

A few hundred years ago the glorious leader of a big country wanted to reward the creator of the chess game. The creator of the game simply wanted one grain of rice put on the first square of the chessboard, two grains on the second, then doubling it for every …

The story has it that a few hundred years ago the ruler of a big country wanted to reward the creator of the chess game. The creator of the game simply wanted one grain of rice put on the first square of the chessboard, two grains on the second, then …

Again, calculate the minimum number of bills or coins required for a given amount of money (change). This time we will use a Go map instead of a csv string converted to a structure.

This Go snippet calculates the minimum number of bills or coins needed for a given amount of money (change) requested. The program also gives the denomination and number. US curency is used in this example, but can be changed to another currency.

Another translation of one of my Python snippets. This function will return a slice of consecutive prime numbers from 2 to a given value limit. In Go the 'int' type (int32) will go as high as 2147483647, but you can replace 'int' with 'uint64' and go as high as 18446744073709551615.

Generators are rather familiar objects in Python. Generators supply data on demand. Using Go you can create a generator with a goroutine and a channel. Here the goroutine is an anonymous function within a function, simple to implement.

Another little adventure into Go coding. This time a slice (a Go open ended array) of structures is used as a record for some data processing. For those who miss the ; at the end of a line of code, you can use them, but the lexer of the compiler …

Some folks go on vacation around the Easter holidays, so it would be nice to know when Easter happens in the years ahead. I had this as a Python snippet in my "oldies, but goodies" file and translated it to Go. It was actually quite easy in this case, and …

This time just a simple example of grading scores (0 - 100) with letters (A - F). Two approaches are presented, one using switch/case in an "on the fly" function, and the other uses the score as an index to a string of letters F through A.

Just some interesting applications of the bitwise and (&), or (|) operators. You might find some other uses.

Reading the content of a web page with a given URL is pretty simple with Go. Here we defer the closing of the response body (at an early point, so we won't later forget) until the program exits.

This shows the application of a Memoize decorator to speed up recursive functions in Python.

Use Google's modern Go language (aka. golang) to convert a denary number (base 10) to a roman numeral. Just a good exercise to explore Go's map, slice, sort and for loop features. Note that in Go the **:=** is shorthand for assigning a type (by inference) and a value to …