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PORefactoring a javascript array rotate function
 

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  1. PORefactoring a javascript array rotate function
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    <p>I wrote a rotate function, but I'm not satisfied with it:</p> <pre><code>var pixels=['011','110','000']; var result=new Array(); result=['000','000','000']; var r = {x:1,y:1}; //rotating point var clock = true; //clock or counter-clock rotation for ( y=0; y&lt;(pixels.length); y++ ){ for ( x=0; x&lt;(pixels.length); x++ ){ var newx=0,newy=0; if ( clock ){ if ( x&lt; r.x &amp;&amp; y&lt; r.y ) {newx=x+2;newy=y ;}//top left if ( x==r.x &amp;&amp; y&lt; r.y ) {newx=x+1;newy=y+1;}//top if ( x&gt; r.x &amp;&amp; y&lt; r.y ) {newx=x ;newy=y+2;}//top right if ( x&lt; r.x &amp;&amp; y==r.y ) {newx=x+1;newy=y-1;}//left if ( x==r.x &amp;&amp; y==r.y ) {newx=x ;newy=y ;}//center if ( x&gt; r.x &amp;&amp; y==r.y ) {newx=x-1;newy=y+1;}//right if ( x&lt; r.x &amp;&amp; y&gt; r.y ) {newx=x ;newy=y-2;}//bottom left if ( x==r.x &amp;&amp; y&gt; r.y ) {newx=x-1;newy=y-1;}//bottom if ( x&gt; r.x &amp;&amp; y&gt; r.y ) {newx=x-2;newy=y ;}//bottom right } else { if ( x&lt; r.x &amp;&amp; y&lt; r.y ) {newx=x ;newy=y+2;}//top left if ( x==r.x &amp;&amp; y&lt; r.y ) {newx=x-1;newy=y+1;}//top if ( x&gt; r.x &amp;&amp; y&lt; r.y ) {newx=x-2;newy=y ;}//top right if ( x&lt; r.x &amp;&amp; y==r.y ) {newx=x+1;newy=y+1;}//left if ( x==r.x &amp;&amp; y==r.y ) {newx=x ;newy=y ;}//center if ( x&gt; r.x &amp;&amp; y==r.y ) {newx=x-1;newy=y-1;}//right if ( x&lt; r.x &amp;&amp; y&gt; r.y ) {newx=x+2;newy=y ;}//bottom left if ( x==r.x &amp;&amp; y&gt; r.y ) {newx=x+1;newy=y-1;}//bottom if ( x&gt; r.x &amp;&amp; y&gt; r.y ) {newx=x ;newy=y-2;}//bottom right } //inject(result,newx,newy,pixels[y][x]) } } </code></pre> <p>does someone now how to write a cleaner code for this rotate (clock and counter-clock) function ?</p>
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    1. COIs the `r` variable the same thing as `result`? If not, it's undefined.
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    2. COthank you for the comment, I forgot to mention r was the pivot point (it's now corrected)
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