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plurals

POCode Golf: Lasers
primarykey
Id
1480023
data
AcceptedAnswerId
1480251
AnswerCount
28
ClosedDate
CommentCount
26
CommunityOwnedDate
2009-09-26T00:00:04.783
CreationDate
2009-09-25T23:55:29.143
FavoriteCount
75
LastActivityDate
2015-04-03T16:21:11.493
LastEditDate
2009-09-28T06:05:29.977
LastEditorUserId
41983
OwnerUserId
41983
ParentId
0
PostTypeId
1
Score
152
ViewCount
11290
LastEditorDisplayName
text
Body
<h2>The challenge</h2> <p>The shortest code by character count to input a 2D representation of a board, and output 'true' or 'false' <em>according to the input</em>.</p> <p>The board is made out of 4 types of tiles:</p> <pre><code> # - A solid wall x - The target the laser has to hit / or \ - Mirrors pointing to a direction (depends on laser direction) v, ^, > or < - The laser pointing to a direction (down, up, right and left respectively) </code></pre> <p>There is only <strong>one laser</strong> and only <strong>one target</strong>. Walls must form a solid rectangle of any size, where the laser and target are placed inside. Walls inside the 'room' are possible.</p> <p>Laser ray shots and travels from its origin to the direction it's pointing. If a laser ray hits the wall, it stops. If a laser ray hits a mirror, it bounces 90 degrees to the direction the mirror points to. Mirrors are two sided, meaning both sides are 'reflective' and may bounce a ray in two ways. If a laser ray hits the laser (<code>^v><</code>) itself, it is treated as a wall (laser beam destroys the beamer and so it'll never hit the target).</p> <h2>Test cases</h2> <pre> Input: ########## # / \ # # # # \ x# # > / # ########## Output: true Input: ########## # v x # # / # # /# # \ # ########## Output: false Input: ############# # # # # > # # # # # # # x # # # # ############# Output: false Input: ########## #/\/\/\ # #\\//\\\ # #//\/\/\\# #\/\/\/x^# ########## Output: true </pre> <p>Code count includes input/output (i.e full program).</p>
Tags
<language-agnostic><code-golf><rosetta-stone>
Title
Code Golf: Lasers
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