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Return to using ranges for day 5

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This commit is contained in:
Nick Thomas
2020-12-05 14:11:59 +00:00
parent 36d94a2846
commit 835bc8509e
2 changed files with 22 additions and 68 deletions
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45
05/part1.js
View File

@@ -6,47 +6,24 @@ const readInterface = readline.createInterface({
console: false
});
// [[x,y], [x,y], ...]
let seats = [];
function makeArray(n) {
let ary = new Array(n);
for(i=0; i<n; i++) {
ary[i] = i;
}
return ary;
}
let seats = []; // [[x,y], [x,y], ...]
readInterface.on('line', function(line) {
const rowSpec = line.substring(0, 7);
const colSpec = line.substring(7, 10);
let result = line.split('').reduce(function(sp, char) {
const halfX = Math.floor((1 + sp[2] - sp[0]) / 2);
const halfY = Math.floor((1 + sp[3] - sp[1]) / 2);
let row = rowSpec.split('').reduce(function(range, char) {
const half = Math.floor(range.length / 2);
let r2 = range;
switch(char) {
case 'F': r2 = range.slice(0, half+1); break;
case 'B': r2 = range.slice(half, range.length); break;
case 'F': sp[3] -= halfY; break;
case 'B': sp[1] += halfY; break;
case 'L': sp[2] -= halfX; break;
case 'R': sp[0] += halfX; break;
};
return r2;
}, makeArray(128));
return sp;
}, [0,0,7,127]);
let col = colSpec.split('').reduce(function(range, char) {
const half = Math.floor(range.length / 2);
let r2 = range;
switch(char) {
case 'L': r2 = range.slice(0, half+1); break;
case 'R': r2 = range.slice(half,range.length); break;
};
return r2;
}, makeArray(8));
seats.push([col[0], row[0]]);
seats.push([result[0], result[1]]);
});
readInterface.on('close', function(line) {

45
05/part2.js
View File

@@ -6,47 +6,24 @@ const readInterface = readline.createInterface({
console: false
});
// [[x,y], [x,y], ...]
let seats = [];
function makeArray(n) {
let ary = new Array(n);
for(i=0; i<n; i++) {
ary[i] = i;
}
return ary;
}
let seats = []; // [[x,y], [x,y], ...]
readInterface.on('line', function(line) {
const rowSpec = line.substring(0, 7);
const colSpec = line.substring(7, 10);
let result = line.split('').reduce(function(sp, char) {
const halfX = Math.floor((1 + sp[2] - sp[0]) / 2);
const halfY = Math.floor((1 + sp[3] - sp[1]) / 2);
let row = rowSpec.split('').reduce(function(range, char) {
const half = Math.floor(range.length / 2);
let r2 = range;
switch(char) {
case 'F': r2 = range.slice(0, half+1); break;
case 'B': r2 = range.slice(half, range.length); break;
case 'F': sp[3] -= halfY; break;
case 'B': sp[1] += halfY; break;
case 'L': sp[2] -= halfX; break;
case 'R': sp[0] += halfX; break;
};
return r2;
}, makeArray(128));
return sp;
}, [0,0,7,127]);
let col = colSpec.split('').reduce(function(range, char) {
const half = Math.floor(range.length / 2);
let r2 = range;
switch(char) {
case 'L': r2 = range.slice(0, half+1); break;
case 'R': r2 = range.slice(half,range.length); break;
};
return r2;
}, makeArray(8));
seats.push([col[0], row[0]]);
seats.push([result[0], result[1]]);
});
readInterface.on('close', function(line) {