How to compute the value of the mathematical constant e using recursion in the Raku programming language.
Computing e in Raku
How to compute the value of the mathematical constant e using recursion in the Raku programming language.
Cached factorial in Raku
Factorial, being a classical task for practising algorithms, is a great example to demonstrate the features of Raku. Let us update the code so that it caches the already calculated values.
Factorial, being a classical task for practising algorithms, is a great example to demonstrate the features of Raku. Let us update the code so that it caches the already calculated values.
Implementing priority queue in Raku
Let us implement a simple priority queue in the Raku programming language.
Let us implement a simple priority queue in the Raku programming language.
Implementing the Ackermann function in Raku
This is the Task 1 from the Perl Weekly Challenge Week 17. You have to implement the so-called Ackermann function.
This is an interesting function that is defined kind of recursively but actually this is not a recursion, as the recurrent formula is using the function as an argument of itself.
This is the Task 1 from the Perl Weekly Challenge Week 17. You have to implement the so-called Ackermann function.
This is an interesting function that is defined kind of recursively but actually this is not a recursion, as the recurrent formula is using the function as an argument of itself.
Generating Niven numbers in Raku
Print all Niven number up to 50, which are the numbers which are divisible the the sum of their digits.
Print all Niven number up to 50, which are the numbers which are divisible the the sum of their digits.
Raku challenge Week 3
Task 1. Generate a list of Regular numbers, which are the numbers, whose prime factors do not exceed 5.
Task 2. Print Pascal triangle with the given number of rows.
Task 1. Generate a list of Regular numbers, which are the numbers, whose prime factors do not exceed 5.
Task 2. Print Pascal triangle with the given number of rows.
Raku challenges Week 2
Task 1. Remove leading zeros from positive numbers.
Task 2. Convert a number to the one represented as a base-35 number and back.
Task 1. Remove leading zeros from positive numbers.
Task 2. Convert a number to the one represented as a base-35 number and back.
Raku Challenge Week 1
Task 1. Capitalise all small letters ‘e’ and count the number of replacements in the string ‘Perl Weekly Challenge.’
Task 2. Write a one-liner that, for the numbers from 1 to 20, prints ‘fizz’ if the number is divisible by 3 and ‘buzz’ if it is divisible by 5.
Task 1. Capitalise all small letters ‘e’ and count the number of replacements in the string ‘Perl Weekly Challenge.’
Task 2. Write a one-liner that, for the numbers from 1 to 20, prints ‘fizz’ if the number is divisible by 3 and ‘buzz’ if it is divisible by 5.
Combinations in Raku
Monday morning, and there are new tasks in the new weekly challenge 067. Both of them require similar Raku tools, namely, the cross operator X.
Monday morning, and there are new tasks in the new weekly challenge 067. Both of them require similar Raku tools, namely, the cross operator X.
Collatz Conjecture in Raku
An interesting task offered on Week 54 of the Perl Weekly Challenge: Print the Collatz Conjecture for the given integer number. The conjecture is that for any starting number, the sequence ends with 1.
An interesting task offered on Week 54 of the Perl Weekly Challenge: Print the Collatz Conjecture for the given integer number. The conjecture is that for any starting number, the sequence ends with 1.
More Raku challenges
Task 1: Find the first 20 so-called Gapful numbers. Task 2: Print all palindromic ddmmyyyy dates between 2000 and 3000. Task 3: Find the first multiple of the given number, which only contains digits 0 and 1.
Task 1: Find the first 20 so-called Gapful numbers. Task 2: Print all palindromic ddmmyyyy dates between 2000 and 3000. Task 3: Find the first multiple of the given number, which only contains digits 0 and 1.
Programming challenge: insert signs between digits
Here’s another drill offered by the Perl Weekly Challenge on Week 44. The task is to get a string 123456789 and insert the signs + and – between the digits so that the evaluated value of the new string equals 100.
Here’s another drill offered by the Perl Weekly Challenge on Week 44. The task is to get a string 123456789 and insert the signs + and – between the digits so that the evaluated value of the new string equals 100.
Practicing Raku challenges
A few Raku challenges solutions: printing arrays, generating Leonardo numbers, converting to octals.
A few Raku challenges solutions: printing arrays, generating Leonardo numbers, converting to octals.
On Perl 7
A couple of days ago, Perl 7 was announced.
Isn’t that a great news? Well, yes and no. I have my personal feelings about this but I hope I can also see some other things that are not so much subjective.
A couple of days ago, Perl 7 was announced.
Isn’t that a great news? Well, yes and no. I have my personal feelings about this but I hope I can also see some other things that are not so much subjective.
Check if the number can be represented as a power of integers
In the second task of this week’s Challenge, you have to find two integers that being powered as xy, give the requested integer number n.
In the second task of this week’s Challenge, you have to find two integers that being powered as xy, give the requested integer number n.
Raku string vs integer practices
Hey there, there’s another task #066-1 offered by the Perl Weekly Challenge (why still not mentioning Raku in the name?).
Integer-divide the two given integers, $m and $n, without using multiplication, or division, or modulo.
Hey there, there’s another task #066-1 offered by the Perl Weekly Challenge (why still not mentioning Raku in the name?).
Integer-divide the two given integers, $m and $n, without using multiplication, or division, or modulo.
My English articles about wavelets
The PDFs of the articles about using wavelets that my thesis supervisor, my co-authors and I wrote in late 1990s and early 2000s in English.
The PDFs of the articles about using wavelets that my thesis supervisor, my co-authors and I wrote in late 1990s and early 2000s in English.
Raku daily skill builders
Here is my Raku solution of the Task 1 on Week 65. The task is to print all $n-digit numbers, whose sum of digits is $s.
Here is my Raku solution of the Task 1 on Week 65. The task is to print all $n-digit numbers, whose sum of digits is $s.
Another Raku one-liner
Let me demonstrate another interesting one-liner that I find to be a good addition to my last years’s book Raku One-Liners. The task was inspired by this week’s problem from the Perl Weekly Challenge.
Let me demonstrate another interesting one-liner that I find to be a good addition to my last years’s book Raku One-Liners. The task was inspired by this week’s problem from the Perl Weekly Challenge.
Some tips for working with hashes in Raku
In this blog post, I am giving a number of examples of how you can use hashes in the Raku programming language in a correct and incorrect ways and explain how to avoid the chance to mislead yourself.
In this blog post, I am giving a number of examples of how you can use hashes in the Raku programming language in a correct and incorrect ways and explain how to avoid the chance to mislead yourself.