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This is code golf. For this challenge, I will accept a method (you don't need a full program), but the method signature does count towards the byte count and I want to see the full signature (not a lamdba). The input for the method is an integer array with 81 elements. The output/return value from the method is a string that represents the array as an ascii sudoku board.
If you're using an esoteric language or something that absolutely doesn't have methods, you can adapt, but if the language supports this at all I want to see something might actually be plugged into a "real" ungolfed program, even if the method body itself is a pain to work with. The requirement is not meant to block languages like Jelly or 05AB1E, but to make it easier for languages like Java to build something that makes sense for that platform.
For the input, integer values 1-9 should have obvious meanings. A 0 should always be interpreted as a blank cell. You may also interpret anything else outside the 1-9 range as a blank cell, but this is not required. Positioning from the array to the puzzle starts at the top left and fills each row from left to right before moving to the next row.
For the boxes, I want double lines around the outside and between each 3x3 region, and single lines between other cells. These should be drawn with line drawing characters (if your I/O format represents strings as a sequence of bytes rather than a sequence of characters, you should represent them in a well-known encoding such as UTF-8 or codepage 347).
For this challenge, I am NOT asking you to generate the sudoku puzzle. That is the input for the function. I am NOT asking you to solve the puzzle. I'm just asking you to produce a string to "draw" what you're given (in as few bytes as possible).
Example Input:
Values for the array:
{ 8, 5, 0, 0, 0, 2, 4, 0, 0, 7, 2, 0, 0, 0, 0, 0, 0, 9, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 7, 0, 0, 2, 3, 0, 5, 0, 0, 0, 9, 0, 0 ,0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 7, 0, 0, 1, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 6, 0, 4, 0}
The values can use whatever mechanism is natural for your language: int[], ArrayList, sequence, tuple, string of digits, whatever, as long as you have a value in the input for every cell (no maps for only populated cells to positions). Remember that the input is supplied... it is not part of your byte count. But the input might represent any sudoku puzzle, and the puzzle might not even have a valid solution. You do get to assume that puzzle is printable. You won't get something with 82 elements, for example.
You also get to assume a reasonable fixed-width font.
Corresponding Output:
╔═══╤═══╤═══╦═══╤═══╤═══╦═══╤═══╤═══╗ ║ 8 │ 5 │ ║ │ │ 2 ║ 4 │ │ ║ ╟───┼───┼───╫───┼───┼───╫───┼───┼───╢ ║ 7 │ 2 │ ║ │ │ ║ │ │ 9 ║ ╟───┼───┼───╫───┼───┼───╫───┼───┼───╢ ║ │ │ 4 ║ │ │ ║ │ │ ║ ╠═══╪═══╪═══╬═══╪═══╪═══╬═══╪═══╪═══╣ ║ │ │ ║ 1 │ │ 7 ║ │ │ 2 ║ ╟───┼───┼───╫───┼───┼───╫───┼───┼───╢ ║ 3 │ │ 5 ║ │ │ ║ 9 │ │ ║ ╟───┼───┼───╫───┼───┼───╫───┼───┼───╢ ║ │ 4 │ ║ │ │ ║ │ │ ║ ╠═══╪═══╪═══╬═══╪═══╪═══╬═══╪═══╪═══╣ ║ │ │ ║ │ 8 │ ║ │ 7 │ ║ ╟───┼───┼───╫───┼───┼───╫───┼───┼───╢ ║ │ 1 │ 7 ║ │ │ ║ │ │ ║ ╟───┼───┼───╫───┼───┼───╫───┼───┼───╢ ║ │ │ ║ │ 3 │ 6 ║ │ 4 │ ║ ╚═══╧═══╧═══╩═══╧═══╧═══╩═══╧═══╧═══╝
Joel Coehoorn
Posted 2017-06-16T16:11:34.557
Reputation: 355
4Are you sure about the method part? That doesn't make sense for a lot of languages (i.e., languages without methods). – Cyoce – 2017-06-16T16:30:53.930
1For languages that don't have methods, you can adapt. But if they do, I'm looking for something that might actually be useful to plug into a "real" program. I'll add that to question. – Joel Coehoorn – 2017-06-16T16:32:34.493
2What's the reasoning for not allowing lambdas? Those could certainly be plugged into a "real" program just as well as named functions / methods – Julian Wolf – 2017-06-16T19:05:49.050
2
Nitpicky but important: There's no such thing as an "ASCII box drawing character." ASCII covers codes 0 through 127, none of which are box drawing characters. In recent times, Unicode is the standard, but it has several different encodings: UTF-8, UTF-16 etc, all of which use more than 1 byte per boxdrawing character. Older encodings such as Codepage 437 support single-byte box drawing characters. When you use characters outside the ASCII range, you should specify which encodings are valid. https://en.wikipedia.org/wiki/Box-drawing_character https://en.wikipedia.org/wiki/Unicode
– Level River St – 2017-06-16T21:02:21.4102"Method" should probably be "named function" to get the closest possible equivalent to a method in non-object-oriented languages. (For example, C, a widely used language, doesn't have methods but does have named functions.) In most of the languages I'm aware of which have methods, they're that language's equivalent of a named function. (The best-known exception I'm aware of is C++, where using a named function would be a lot more plausible for this task than using a method would be, as it's really unclear what sort of object you'd associate the method with.) – None – 2017-06-17T00:58:40.510