David's CodeJam solutions
Usage
npm installnpm start -- --problem=<problem name> --input=<input file>
Example
This command runs the 'rope-intranet' problem (see
problems/rope-intranet.js) with the input file given in the same
directory, and output file named answer.txt. If you omit the output
file, it will print the answer to stdout.
npm start -- --problem='rope-intranet' --input='./problems/rope-intranet-small.in' --output='answer.txt'
Adding your solutions
input-parser.js contains a simple parser for codejam input
files. For instance, for lists of things, it consumes one line that is
the ocunt of things, then executes a sub-parser for each of those
things (each sub parser outputs some datastructure, and may consume
any number of lines).
For instance, in rope-intranet.js, we have the following spec:
export const spec = runEach(ropeTest, parseList(
parseObject(line => {
let [left, right] = line.split(' ');
left = parseInt(left);
right = parseInt(right);
return {left, right};
})
));
the runEach says to run the following function for each test-case
(where the first line is the number of test cases, and then each test
case follows). The value passed into the function ropeTest is a
list of ropes. That's done with parseList, which has similar
functionality to runEach but returns a list of things given a
sub-parser, and the parseObject takes each line for a rope and
parses it out into the left and right building heights per the
problem. Example input would look like this:
2 // number of test cases
2 // number of ropes (test case 1)
3 3 // height of 3 for left building, 3 for right building (rope 1)
4 1 // height of 4 for left building, 1 for right building (rope 2)
1 // number of ropes (test case 2)
7 4 // height of 7 for left building, 4 for right building (rope 1)