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  1. process.stdin.resume();
  2. process.stdin.setEncoding('utf8');
  3.  
  4. // your code goes here
  5. const draw = keys => {
  6.   const dir = {'>': {y: 0, x: 1}, 'v': {y: 1, x: 0}, '<': {y: 0, x: -1}, '^': {y: -1, x: 0}};
  7.   const max = {y: 0, x: 0}, min = {y: 0, x: 0};
  8.   const scr = [];
  9.   const lastPos = [...keys].reduce((acc, key) => {
  10.     const {y, x} = dir[key];
  11.     const cur = {y: acc.y + y, x: acc.x + x};
  12.     if (!(cur.y in scr)) scr[cur.y] = [];
  13.     scr[cur.y][cur.x] = key;
  14.  
  15.     if (cur.y > max.y) max.y = cur.y;
  16.     else if (cur.y < min.y) min.y = cur.y;
  17.     if (cur.x > max.x) max.x = cur.x;
  18.     else if (cur.x < min.x) min.x = cur.x;
  19.  
  20.     return cur;
  21.   }, {y: -dir[keys[0]].y, x: -dir[keys[0]].x});
  22.   const strs = [];
  23.   for (let y = min.y; y <= max.y; y++) {
  24.     let row = '';
  25.     for (let x = min.x; x <= max.x; x++) {
  26.       row += scr[y][x] || '*';
  27.     }
  28.     strs.push(row);
  29.   }
  30.   return strs.join('\n');
  31. }
  32. console.log(draw('<<<<^^^^>>>>>vv<<<<<<<<<<<vvv>>>^^^^^^^>>>>>>>>>>vvvvvv'));
Success #stdin #stdout 0.04s 146816KB
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stdin
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Standard input is empty
stdout
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***^>>>>>>>>>>
***^*********v
***^**^>>>>>*v
***^**^****v*v
<<<^<<<<<<<v*v
v**^**^******v
v**^**<<<<***v
v>>>**********
https://ideone.com/vzncKq
language:
Node.js (node 11.12.0)
created:
5 years ago
visibility:
public

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