2,322 Reusable Code Snippet Topics
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 | 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 … |
 | since the forum has been quiet for a while I thought to post this program , it might start new discussions . the idea is not new but it should be interesting to starters . as usual any comments is appreciated |
 | One of the most, if not THE most, beautiful formulas in math, is from Euler:  It combines in it a relation between the number **e**, the number **Pi** and the complex number **i**, plus the basic math symbols 1, +, = and zero. Is that not amazing? More …  |
| | After reading this excellent [code snippet](https://www.daniweb.com/software-development/csharp/code/492766/display-excel-data-in-a-datagridview) by djjeavons, and just trying to learn WPF, I decided: "Well, let's translate that to WPF!". It was a bit harder than I thought, but a great learning experience! Her's how my screen in action looks:  Things that changed compared to the … |
| | Inheritance with generic types can sometimes be tricky. If you would inherit from a Stack<double>, no problem, but what if you want to keep it as generic as possible? Maybe it's a bad idea, but I wrote something like `class Stacker<T> : Stack<T>` and in Stacker I implemented some arithmetic … |
 | This is the code to align the content of a Panel in the Center, Hope this Helps :) |
 | I found that one can use dictionaries to hold Tkinter widget config and display parameters. This then permits one to have these dictionaries elsewhere in the code for easy modification instead of buried within the code for each widget. I particularly like to place these dictionaries toward the top of … |
| | I have been learning NumPy arrays/matrices in Python. As I worked, I found that I desired a more readable form of 3d matrices. So I figured that writing one would be a good goal and learning exercise. The goal was to create a function that would print 3d NumPy matrices … |
| | 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.  |
| | It could be simplifide more, I know. I was doing it as an exersise so its rough and skecthy. But it's workable, I tested it more then 50 times.  |
| | 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. |
| | I needed a calculator and I didn't want to use google since my internet is slow. So I made one! Here it is. Working with it is simple. Use the number and operation keys("c" for clear, "p" for pi, and "s" for sqrt) as well as the return and enter … |
| | karmstrong ask in the Python chat if any one was farmilar with converting a for loop in C to Python. Here is a program in python that will do it for you! Thank You! |
| | 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 … |
| | I made a little py editor because I didn't want to go to all the troble of installing an idle, but I didn't like notepad either. Here it is! |
| | Sometimes, when I have really, really nothing else to do, I start doodling with some code. Wanted to display the coordinates of the mouse pointer. Thought it was complicated, but it was rather easy. Look, starting at line 94. Then: why not explore a [Bezier curve](https://en.wikipedia.org/wiki/B%C3%A9zier_curve), and what if I … |
 | Quite a while ago, I made [URL="http://www.daniweb.com/code/snippet217147.html"][B]this[/B][/URL] snippet. This code is basically the same, except that it adds animation. This method of blitting is very fast assuming you don't use a surface that's too large. On a 500 x 500 surface, I managed 350fps using only 0-1% of the cpu. … |
| | 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. |
| | Needed a func to convert base 2 into 10, and back. Found the referenced code in this func for moving between three bases, and generalized it to between bases 2 and 62, and all in between. Upconvert a number, then down convert, then upconvert again. Go wild, have fun. |
| | A little experiment with custom sorting the result of a word frequency count using Google's Go language. |
| | In my quest to learn more regarding programming in Python, I "dissect" a lot of other people's code. While doing this, or writing my own code, I end up with 10's of debug print lines. Things like this: if v_Debug == 1: print("DEBUG - ".format()) # DEBUG If I decide … |
| | I, and many others, desired a "switch" keyword in Python. For me it was to a desire to make some of my code more compact and readable, as I often have many user selected options for the code to weed through. So I set off on a journey to figure … |
 | I have just seen a resurrected thread about issues with loading images to a PictureBox and the inability to delete the file while the program is running. There was no clear explaination of the problem, only suggested hacks and apparent frustration. So I thought I would offer this explanation from …  |
| | I've been playing with PDO and got quite a shock, so I thought I'd run this past you all. I love PDO, and I thought that the "prepare once, execute many" idea behind prepared statements was beautiful. Now previous to using prepared statements, I used to build up a long … |
| | too many new and intermediate users of C attempt to use the command [icode]fflush(stdin)[/icode] to "flush the input buffer". this is patently wrong. the rule is (and click if you don't believe me) : [URL="http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1052863818&id=1043284351"]NEVER [/URL][URL="http://answers.yahoo.com/question/index?qid=20071013052534AAuxWmW"]USE [/URL][URL="http://www.gidnetwork.com/b-57.html"]"FFLUSH()"[/URL] [URL="http://www.linuxforums.org/forum/linux-programming-scripting/41287-problem-fflush-stdin-function.html"]ON [/URL][URL="http://www.it.usyd.edu.au/~dasymond/mirror/c-faq/stdio/gets_flush2.html"]INPUT [/URL][URL="http://www.cplusplus.com/forum/general/6554/"]STREAMS [/URL][URL="http://c-faq.com/stdio/stdinflush.html"]SUCH [/URL][URL="http://gcc.gnu.org/ml/gcc-help/2009-01/msg00287.html"]AS [/URL][URL="http://www.dreamincode.net/forums/showtopic45833.htm"]"STDIN" [/URL] here is one method of properly … |
| | 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. |
| | I needed a random color selector. I found one [here](http://peepspower.com/python-script-to-generate-random-css-colors). I rewrote it to make it more general purpose. "f_GenRandomColor" is the picker. The output is in list form, which should make it suitable for most general applications. "f_HTMLRandomColorChart" is just a way to create an HTML table to test …  |
| | This will take a value in EAX or AX, convert to ASCII hex with optional padding and upper or lower case This example would yield "---fc103a" push word 0x222d ; 32 bit conversion, padd output with '-' push word ASCPntr ; Pointer to end of conversion buffer push 0xfc103a call … |
| | 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. |
| | I am posting this in response to those who ask about replacing the webbrowser (WB) control’s default browser. You cannot ask the WB control to use a different browser, it is hardwired to use the current version of Microsoft’s Internet Explorer that is installed on the target computer. It may … |
| | 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. |
| | When recursion won't do, then memoizaton will. |
| | This shows the application of a Memoize decorator to speed up recursive functions in Python. |
| | Allows multiple entries using raw_input. I often have to enter multiple items in my Python programs. I desired an easier way than using a loop(s). Today I discovered a way, and with a few mods made it happen. |
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