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Questions tagged [conversion]

This tag indicates that the challenge involves converting from one format to another.

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24 votes
29 answers
5k views

Generate excel column name from index

This one comes from a real life problem. We solved it, of course, but it keeps feeling like it could have be done better, that it's too lengthy and roundabout solution. However none of my colleagues ...
26 votes
57 answers
4k views

Converting Strings to Decimals (Gone Wrong)

What? Many programming languages, both practical and esoteric, have functions, methods, etc to convert a given string to a decimal number. This is how the process might work: For each character in ...
29 votes
39 answers
4k views

Convert a string of digits from words to an integer

Convert a string containing digits as words into an integer, ignoring leading zeros. Examples "four two" -> 42. ...
19 votes
5 answers
453 views

Convert an Expression to Panfix Notation

I was browsing esolangs, and chanced upon this language: https://github.com/catseye/Quylthulg. One interesting thing about this language, is that it doesn't use prefix, postfix, or infix, it uses all ...
7 votes
11 answers
779 views

Convert tiers between credit rating system

Related: Sort these bond ratings Credit rating agencies assign ratings to bonds according to the credit-worthiness of the issuer. The rating business is mostly controlled by "Big Three" ...
18 votes
52 answers
2k views

IPv4 Integer Conversion Function

Write the shortest function to convert an IP address into it's integer representation and output it as an integer. To change an IPv4 address to it's integer representation, the following calculation ...
23 votes
51 answers
3k views

Running length of the movie in a human readable format

Whenever I search for the running length of a movie in IMDb, it is displayed in minutes. Immediately I would try to convert it into hour(s) and minute(s). It would be better if we could automate this. ...
27 votes
55 answers
4k views

Convert C header names to C++ header names

In the C standard library, header names end with a .h suffix: stdio.h In C++, those header names are available in an ...
31 votes
27 answers
3k views

Golf Text into DNA

Text to DNA golf Challenge Convert input into a DNA output. Algorithm Convert text into ASCII code points (e.g. codegolf -> ...
26 votes
65 answers
7k views

String to Binary

This is a code golf challenge. Just like the title says, write a program to covert a string of ascii characters into binary. For example: "Hello World!" should ...
18 votes
10 answers
5k views

HSL to RGB values

The main purpose of the RGB (Red Green Blue) color model is for the sensing, representation and display of images in electronic systems, such as televisions and computers HSL (Hue Saturation Lightness)...
17 votes
38 answers
3k views

Convert superscript numbers to normal numbers

Introduction My gnome friends are writing a programming language and have asked for my help. Due to their size, the gnomes can only handle small superscript numbers instead of big numbers. However, ...
5 votes
17 answers
894 views

Convert a decimal integer to binary only using arithmetic operators

There are 10 types of people in the world, those who understand binary and those who do not. Where are you? Let's see! Challenge Your task is to convert a decimal integer to binary, only using a ...
19 votes
21 answers
6k views

Convert an integer to IEEE 754 float

The task is simple: given a 32 bit integer, convert it to its floating point value as defined by the IEEE 754 (32-bit) standard. To put it another way, interpret the integer as the bit-pattern of an ...
19 votes
22 answers
5k views

Decode a variable-length quantity

A variable-length quantity (also referred to as VLQ or uintvar) is a way to encode up to a 28 bit integer value using only as many bytes as necessary. This was used ...
5 votes
2 answers
1k views

Convert integer to string preserving order

The quest is to convert an integer to a string in such a way that 1. the order is preserved 2. using the least number of characters in the string. Let's say I have an integer X; the objective is to ...
53 votes
22 answers
6k views

Sᴍᴀʟʟ Cᴀᴘꜱ Cᴏɴᴠᴇʀᴛᴇʀ

Portable Spec. Iɴꜱᴘɪʀᴇᴅ ʙʏ @ConorO'Brien's ᴜꜱᴇʀɴᴀᴍᴇ. Aʟꜱᴏ ᴛʜᴀɴᴋꜱ ᴛᴏ @Dᴏᴏʀᴋɴᴏʙ ꜰᴏʀ ꜱʜᴏᴡɪɴɢ ᴍᴇ ᴛʜᴇ ᴇxɪꜱᴛᴇɴᴄᴇ ᴏꜰ ǫ ᴀɴᴅ x. Sᴍᴀʟʟ ...
35 votes
15 answers
5k views

How much Mana do I need?

Dungeon Master was one of the first ever real-time role-playing games, originally released in 1987 on the Atari ST. Among other exciting things for the time, it offered a rather sophisticated spell ...
19 votes
8 answers
792 views

Convert the Time to a String

Problem One day, you boss walks up to you and tells you he needs to know the time. He still insists after you pointing at the clock directly above your head, and confesses he has a severe case of ...
7 votes
8 answers
898 views

Brainf*** to tinyBF converter

You don't need to know these languages to participate. All necessary information has been provided in this question. You should write a program or function which given a brainfuck (BF) code as input ...
5 votes
16 answers
663 views

Convert Binary to Text [duplicate]

Your task is to write a program, which takes a binary input and converts it to plain text. For Example: 01100001 01100010 01100011 = "abc" Rules Input can come ...
23 votes
15 answers
2k views

Convert height to US Men’s Jacket size

In the US, clothing size sometimes has rough designations like M, L, XXL, etc. The US designation of the "men's jacket" category depends on the height of the person. So, in this challenge, ...
28 votes
40 answers
6k views

12 hour to 24 hour time converter

Amazingly, this simple task doesn't seem to exist already, so... Your task is to write a program that takes as input a 12 hour time, and converts it into "military time", or 24-hour time format. ...
14 votes
2 answers
847 views

Densely packed decimal (DPD) to decimal, with logic gates

Inspired by recent popularity of nandgame on TNB, and my own previous challenge. Background Densely packed decimal (DPD) is a way to efficiently store decimal digits in binary. It stores three ...
13 votes
21 answers
2k views

How to convert HEX2 to RGBA?

The world of art is full of colour, but the world of the network is even fuller than the world of art of diferent colours and it's renderings. That's why we need to know how to convert one type of ...
25 votes
12 answers
3k views

Bake me some moji

Given a string, character list, byte stream, sequence… which is both valid UTF-8 and valid Windows-1252 (most languages will probably want to take a normal UTF-8 string), convert it from (that is, ...
8 votes
5 answers
363 views

Average impact of multiple conversion errors

Imagine four people stand in a line. The first looks at a thermometer, and tells the temperature to the person on their right. This continues down the line, until the last person writes the ...
10 votes
14 answers
569 views

Expand Comparison Chains

Unlike most languages, Python evaluates a<b<c as it would be done in mathematics, actually comparing the three numbers, as opposed to comparing the boolean <...
1 vote
1 answer
160 views

Twist on words to numbers [closed]

The Goal The goal of this question is to put a twist on this question. Your answer should be able to convert an array of words associated with integers into those integers. As an extra challenge, ...
8 votes
3 answers
371 views

Line ending conversion program

Write a program or function that alters the file at a user-specified filename via replacing all instances of UNIX line endings with Windows line endings and vice versa. Clarifications: For the ...
26 votes
20 answers
2k views

Crown hundred crownty crown

I noticed a certain game had a peculiar life counter, which instead of stopping at 999, gained a new digit – the next number was crown hundred or ...
28 votes
24 answers
2k views

Convert to Bibi-binary

Bibi-binary is a numeric system invented by Boby Lapointe in order to represent numbers in letters which pronunciation seems funny. Your task is to convert decimal numbers into Bibi-binary! ...
24 votes
9 answers
2k views

Bilibili AV/BV Code Conversion

Background Bilibili is a China-based video sharing platform, similar to Nico Nico Douga in Japan, and Youtube around the world. Since the establishment, Bilibili had been using the AV code to ...
9 votes
13 answers
2k views

From Rgb to Cmyk

Given 3 bytes or RGB as input, calculate the nearest CMYK values, and output them. create either a function with parameters and return value or a program that operates on stdin/stdout use the color ...
7 votes
15 answers
1k views

Convert to Bubble Letters

So I was playing around with my compose key, and found some cool things, one of them being that by pressing compose + ( + alphanumeric + ), you get that character ...
9 votes
1 answer
1k views

Convert Complex Chinese Numbers into Arabic Numbers

Your task is to convert Chinese numerals into Arabic numerals. A problem similar to Convert Chinese numbers, however, more complex. Also, answers given there mostly don't satisfy all the conditions. ...
41 votes
27 answers
7k views

Count Like a Babylonian

Challenge Given an ASCII representation of a Babylonian number as input, output the number in Western Arabic numerals. Babylonian Numeral System How did the Babylonians count? Interestingly, they ...
10 votes
17 answers
1k views

Tesco's Burger Relish Best Before End date number

Given a date between 2010-01-01 and 2099-12-31 as three integers (please state your order if not [year,month,day]), answer with Tesco's corresponding five-digit ...
67 votes
21 answers
13k views

Translate your English source code into a foreign language [closed]

I have noticed that there are a disproportionate number of computer languages based on English. I propose to fix this by translating existing computer languages into foreign languages! Pick a ...
28 votes
12 answers
4k views

Densely packed decimal (DPD) to decimal

For nandgame fans: Please try out DPD to decimal in logic gates too! Background Densely packed decimal (DPD) is a way to efficiently store decimal digits in binary. It stores three decimal digits (...
-1 votes
1 answer
284 views

Morse sudo-ku-de

Hehe, see what I did with the title? Anyways... Your job is to create a sudoku solver that accepts input in Morse code and creates output in Morse code. Here's the Morse code numbers for reference: <...
43 votes
5 answers
2k views

My god, it's full of spaces!

Some people insist on using spaces for tabulation and indentation. For tabulation, that's indisputably wrong. By definition, tabulators must be used for tabulation. Even for indentation, tabulators ...
16 votes
10 answers
2k views

Convert an Excel date code to a "date"

Given a non-negative integer Excel-style date code, return the corresponding "date" in any reasonable form that clearly shows year, month, and "day". Trivial, you may think. Did you notice the "scare ...
1 vote
0 answers
104 views

Sino-Korean numerals [duplicate]

The Korean language has two sets of numerals, a native Korean numerals and Sino-Korean numerals. The native Korean numerals are mostly used for numbers under 100, such as age and time. The Sino-...
12 votes
7 answers
28k views

Convert between Music clefs

Before you leave, you do not have to understand much musical notation to do this challenge. EXPLANATION In standard sheet music, double clefs go across the page serving as reference points to the ...
38 votes
6 answers
2k views

COBOL Y2K redux

In the 1990s, COBOL computer engineers worked out a way to extend six-digit date fields by converting them to YYYDDD where YYY ...
28 votes
15 answers
4k views

Goodness, it's covered in tabs!

Space indentation users, unite! We must fight against all the lowly tab users! Your mission (should you choose to accept it) is to write a program or function that takes in two arguments: A string: ...
2 votes
1 answer
123 views

Array-of-array string conversion to and from matrix [closed]

Matrix challenges are popular. There's an issue of how to provide test cases. A common method is the row-wise array-of-arrays representation, such as: ...
4 votes
5 answers
414 views

Help me with my chemistry homework!

Near the middle of the semester in chemistry, we get problems like: Convert 1.283850057 to Scientific Notation and Convert 3.583✕106 to Standard Notation This is just stupid busy work for ...
14 votes
14 answers
1k views

Short Date into English Long Date

Convert short date format into English long date in as few bytes as possible. Input Input will be in the form of a string with format, yyyy-mm-dd, with zero padding ...