Fix JS array-pair-sum tests

Author: blakeembrey

solutions/javascript/array-pair-sum.js

@@ -10,7 +10,7 @@ module.exports = function arraypairsum (k, array) {
     var len = hash[diff];
 
     while (len--) {
-      pairs.push([number, diff]);
+      pairs.push([diff, number]);
     }
 
     hash[number] = (hash[number] + 1) || 1;

tests/javascript/array-pair-sum.js

@@ -7,10 +7,10 @@ describe('Array Pair Sum', function () {
   });
 
   it('should not output duplicate results', function () {
-    expect(arrayPairSum(8, [3, 4, 5, 4, 4])).to.eql([[3, 5], [4, 4]]);
+    expect(arrayPairSum(8, [3, 4, 5, 4, 4])).to.eql([[3, 5], [4, 4], [4, 4], [4, 4]]);
   });
 
-  it('should only allow distinct elements', function () {
-    expect(arrayPairSum(4, [1, 1, 2, 3, 4])).to.eql([[1, 3]]);
-  });
+  it('should work not find any matches', function () {
+    expect(arrayPairSum(10, [3, 5, 6, 8])).to.eql([]);
+  })
 });