Popular recipes by Antoni Gual

Count lines and words in a text file (Batch)

2017-04-28T08:22:08-07:00

Batch recipe 580791 by Antoni Gual (word_count). Revision 2.

Returns number of lines and words (separed by spaces) of a text file dragged to the script. Does'nt count blank lines.

Batch prime generator (Batch)

2017-04-25T11:44:27-07:00

Batch recipe 580789 by Antoni Gual (primes). Revision 3.

Here is a radically differnt approach to generating primes in pure batch that overperforms everything else I have found . The idea comes from an exercise in Knuth's TAOCP Vol 3 page 617.

File selector dialog in batch (Batch)

2017-03-27T13:20:41-07:00

Batch recipe 580665 by Antoni Gual (batch, directory). Revision 2.

Runs mshta hidden to open a file dialog and get the path of the file selected. No parameters can be passed to the dialog. EDITED: I did a subroutine with the snippet

Add days to a calendar date- Julian date (Batch)

2016-08-17T10:32:03-07:00

Batch recipe 580683 by Antoni Gual (calendar).

The trick to add days to a date is to convert the date to a serial, do a normal addition then convert the result back to a date. The serial I use here is the Julian day number used by the astronomers because its conversion formulas arewell documented. If you check the julian day number on internet the result can vary by a day, because julian days start at noon and i'm not making this distinction.

Get text length - Column left center and right alignement (Batch)

2016-06-15T06:42:00-07:00

Batch recipe 580682 by Antoni Gual .

The recipe parses some lines of text (separator=$), calculates the width of each column and prints the text in columns with lefr, right and center alignment. I have put the strlen and the alignment routines in separate procedures, to ease the reuse. The alignement procedures work in place, the result is returned in the same variable as the original string.

Send and retrieve text to/from clipboard (Batch)

2016-05-27T09:56:56-07:00

Batch recipe 580669 by Antoni Gual (batch, clipboard).

Sending uses the command line tool clip.exe that may not be available in Windows XP. There is no standard tool to retrieve from clipboard so I use javascript via mshta.

ASCII art Sphere with integer square root (Batch)

2016-06-06T10:09:38-07:00

Batch recipe 580673 by Antoni Gual (ascii, graphics). Revision 2.

The code draws a sphere in ASCII Art. Square root routine bt Aacini

Permutations by recursive Heap's method (Batch)

2016-06-11T08:42:41-07:00

Batch recipe 580678 by Antoni Gual (permutation, recursion).

Setlocal / endlocal allow for recursion in batch. Values can be passed by value and by reference, the later can return a value to the caller.

Last sunday of each month for a given year (Batch)

2016-06-07T20:25:00-07:00

Batch recipe 580677 by Antoni Gual (calendar). Revision 2.

Includes batch routines for day of week, is leap year and last dat of the month

Timing a batch program (Batch)

2016-05-29T10:50:33-07:00

Batch recipe 580670 by Antoni Gual (batch, timing).

It uses %time% to time a function to the hundredth of second.

Batch priority queue (Batch)

2016-05-26T11:00:21-07:00

Batch recipe 580666 by Antoni Gual (batch).

The fact the environment sorts itself by key allows us to implement a PQ using the prefix "queu" added to the priority value as a key

Python Mandelbrot Fractal with Tkinter (Python)

2015-05-06T09:57:27-07:00

Python recipe 579048 by Antoni Gual (fractal, graphics, python, tkinter). Revision 9.

Displays in a Tk window a pretty coloured 640x480 Mandelbrot set in 6 seconds. Calculates each one of the 300K pixels with a maximum of 256 iterations.
Only Tkinter used. Tested with Python 3.4
I will test any contribution and add it to the code if worthy.

generates a set of binary files by doing ASCII replacements on a master binary file, controlled by a csv file (Python)

2015-09-16T16:25:49-07:00

Python recipe 579099 by Antoni Gual (ascii, files, python3, replace).

A hack that saved me a lot of time. Well perhaps not so much, but it was funnier than to do it manually.

Run OS command with timeout on a list of files using several threads (Python)

2015-05-19T19:31:59-07:00

Python recipe 579056 by Antoni Gual (command, subprocess, threading). Revision 3.

This hack runs a command sequentially on a list of files using two simultaneous threads. If one of the commands takes more than a set time, it's killed and the program goes for the next file. EDITED to add some exception handling.

Prime factors of an integer by Brent algorithm (Python)

2015-05-28T06:47:01-07:00

Python recipe 579049 by Antoni Gual (primes, python).

This recipe uses trial division to get factors below 1 milion then switches to Brent's algorithm to get bigger factors. No fast enough to break a RSA key :)

Animated raster graphics demo in Tkinter (Python)

2015-05-05T20:26:41-07:00

Python recipe 579052 by Antoni Gual (animation, graphics, python, tkinter). Revision 4.

EDITED: A small animated graphics demo in Tkinter, displaying a 1990's style Rotozoom, more interesting than the TV snow I posted previously. The Tkinter management part is just the same. The code is a little longer as some trig tables must be precalculated for speed. The window size corresponds to the resolution of the old DOS screen 13, as I originally coded the demo for Qbasic.