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3383083
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2010-08-01T17:48:00.777
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2010-08-02T22:12:26.637
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<h1>Javascript - <strike>398</strike> 393 characters</h1> <p><br></p> <h2>Working Function</h2> <p><code>v(j, o, l)</code>, where:<br></p> <ul> <li><code>j</code> is the page number</li> <li><code>o</code> is the total number of pages</li> <li><code>l</code> is the number of pages to display (subset size)</li> </ul> <p><code>v(10, 30, 5)</code> returns: <code>[1]...[8][9][x][11][12]…[30]</code></p> <pre><code>function v(j,o,l){function k(q){return q.length}function y(n,m){t=[];while(n<=m){t.push(n);n++}return t}r=y(1,j-1);g=y(j+1,o);b=k(r);a=k(g);c=l/2;(b>l/2&&a>=c)?r=r.splice(-l/2):((a<=c)?r=r.splice(-l+a+1):0);b=k(r);g=g.slice(0,l-1-b);a=k(g);r.push("x");g[a-1]==o-1?g.push(o):0;r[0]==2?r.unshift(1):0;r=r.concat(g);return(r[0]>2?"[1]...":"")+"["+r.join("][")+"]"+(g[k(g)-1]<o-1?"...["+o+"]":"")} </code></pre> <hr> <p><br></p> <h2>Uncompressed version</h2> <pre><code>function run(cp, tp, l) { function y(n,m){t=[];while(n<=m){t.push(n);n++}return t}; var before=y(1, cp-1); var after=y(cp+1, tp); var b=before.length; var a=after.length; var c=Math.floor(l/2); if (b>l/2 && a>=c) { before=before.splice(-l/2); } else if (a<=c) { before=before.splice(-(l-a)+1); } b=before.length; after=after.slice(0, l-1-b); a=after.length before.push("x"); if (after[a-1]==tp-1) after.push(tp); if (before[0]==2) before.unshift(1); before=before.concat(after); // Add bounds to either side var pre=["",""]; if (before[0]>2) pre[0]="[1]..."; if (after[after.length-1]<tp-1) pre[1]="...["+tp+"]"; return pre[0]+"["+before.join("][")+"]"+pre[1]; } </code></pre> <p><br></p> <h2>A simple test function</h2> <pre><code>function testValues() { var ts=[1, 30, "[x][2][3][4][5]...[30]", 2, 30, "[1][x][3][4][5]...[30]", 13, 30, "[1]...[11][12][x][14][15]...[30]", 27, 30, "[1]...[25][26][x][28][29][30]", 30, 30, "[1]...[26][27][28][29][x]", 3, 6, "[1][2][x][4][5][6]", 4, 7, "[1][2][3][x][5][6][7]"]; for (var i=0; i<ts.length; i+=3) { var rr=v(ts[i], ts[i+1], 5); document.write(ts[i]+" of "+ts[i+1]+": "+rr+" |Correct-> "+ts[i+2]+"<br>"); ts[i+2]==rr ? document.write("<span style='color:green'>Check!</span>") : document.write("<span style='color:red'>Fail</span>"); document.write("<br><br>"); } } </code></pre>
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1. POCode Golf - Generate nearby page numbers based on the current page
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