Middle three digits: Difference between revisions

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@@ Line 440: / Line 440: @@
 =={{header|JavaScript}}==
+<lang JavaScript>function middleThree(x){
-{{incorrect|JavaScript|Error messages miss negative sign for negative values that are erroneous.}}
+  n=''+Math.abs(x); var l=n.length-1;
-<lang JavaScript>function middleThree(n){
+  if(l<2||l%2) throw new Error(x+': Invalid length '+(l+1));
-  n=''+Math.abs(n); var l=n.length-1;
-  if(l<2||l%2) throw new Error(n+': Invalid length '+(l+1));
   return n.slice(l/2-1,l/2+2);
 }