Cake Cutting

The year is 2035. Cake cutting is the last profession humans have left, everything else has been replaced by AI. Your job is to change that. Given a cake on STDIN and a series of cutting instructions, output the resulting cake, with slices separated.

You will be given a cake followed by a series of instructions in either the form x=… or y=…. The coordinates are 0 indexed for the spaces in between that row or column. For example, x=0 would indicate that you need to slice between the 1st and 2nd columns of the cake.

Input:
###
###
###
x=0
y=0

First step: (x=0)
# ##
# ##
# ##

Second step: (y=0)
# ##
    
# ##
# ##

The cake is separated after each cut. If a cut lands between two slices, that indicates that the customer wants more space between those two slices:

Input:
| |
|||_
x=0
y=0
y=0

Expected output:
|   |
     
|  ||_

Judge

(async function*(context: Context): Challenge {
	const testcases = `\
###
###
###
x=0
y=0

# ##
    
# ##
# ##


HelpI'm
trapped
inacake
cutting
machine
x=0
x=1
y=3
y=0
x=6
x=7

H  elpI  'm
           
t  rapp  ed
i  naca  ke
c  utti  ng
           
m  achi  ne


*
*
*
y=0
y=2

*
 
*
 
*


* * * *==========
 * * * ::::::::::
* * * *==========
:::::::::::::::::
=================
x=6
y=2

* * * * ==========
 * * *  ::::::::::
* * * * ==========
                  
::::::: ::::::::::
======= ==========


+----------+
|  Happy   |
| Birthday |
+----------+
x=1
x=3
x=5
x=7
x=9
x=11
x=13
x=15
x=17

+- - - - - - - - - -+
|    H a p p y      |
|  B i r t h d a y  |
+- - - - - - - - - -+


. . . .
 . . . 
. . . .

. . . .
 . . . 
. . . .`.split('\n\n\n').map(t => t.split('\n\n')) as [string, string][];

	for (let [input, output] of testcases) {
      yield (await context.run(input)).assertEquals(output);
    }

	return context.noFailures();
})

Example Code

const data = require('fs').readFileSync(0).toString();

let cake_grid = [];
const instructions = [];
for (const line of data.split('\n')) {
    if (line.startsWith('x=') || line.startsWith('y=')) {
        instructions.push(line);
    } else {
        cake_grid.push([...line]);
    }
}

let cake_width = cake_grid[0].length;

for (const instruction of instructions) {
    const instruction_type = instruction[0];
    const instruction_data = parseInt(instruction.slice(2));

    if (instruction_type === 'y') {
        cake_grid.splice(instruction_data + 1, 0, [...' '.repeat(cake_width)])
    }

    if (instruction_type === 'x') {
        for (const row of cake_grid) {
            row.splice(instruction_data + 1, 0, ' ')
        }
        cake_width += 1;
    }
}

for (const row of cake_grid) {
    console.log(row.join(''))
}