solution and test for llipio#19

solutions/19.js

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+// Betty Chow
+// Find pais that sum to x
+
+const solution = (arr, x) => {
+
+  let newArr= [];
+  for (let i = 0; i < arr.length; i++) {
+    for (let j=i+1; j < arr.length; j++ ) {
+      if (arr[i] + arr[j] === x) {
+        newArr.push([arr[i], arr[j]]);
+      }
+    }
+  }
+
+  return newArr;
+};
+
+module.exports = {
+  solution
+};

test/19.js

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+const expect = require('chai').expect;
+let solution = require('../solutions/19').solution;
+
+describe('Pairs sum to x', () => {
+  it('should return pairs of number that sum to x', () => {
+    const result = solution([1,2,3,4,5], 6);
+    expect(result).eql([[1,5],[2,4]]);
+  });
+  it('should return pairs of number that sum to x', () => {
+    const result = solution([3,5], 8);
+    expect(result).eql([[3,5]]);
+  });
+  it('should return pairs of number that sum to x', () => {
+    const result = solution([4,2,9,3,8,6,7], 11);
+    expect(result).eql([[4,7],[2,9],[3,8]]);
+  });
+});