From b2a3d3c6b4a728e3288760ea05f32670bcef139c Mon Sep 17 00:00:00 2001 From: Abhisek Pattnaik Date: Wed, 7 Sep 2016 19:01:21 +0530 Subject: [PATCH] refactor(challenge): Update symdiff solution Refactor previous solution to use a one liner solution. --- .../advanced-bonfires.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/seed/challenges/01-front-end-development-certification/advanced-bonfires.json b/seed/challenges/01-front-end-development-certification/advanced-bonfires.json index c7c90a3693..85198e3517 100644 --- a/seed/challenges/01-front-end-development-certification/advanced-bonfires.json +++ b/seed/challenges/01-front-end-development-certification/advanced-bonfires.json @@ -100,7 +100,7 @@ "sym([1, 2, 3], [5, 2, 1, 4]);" ], "solutions": [ - "function sym(args) {\n var index = -1;\n var length = arguments.length;\n var result;\n while (++index < length) {\n var array = arguments[index];\n result = result ? diff(result, array).concat(diff(array, result)) : array;\n }\n return result ? uniq(result) : [];\n}\n\nfunction uniq(arr) {\n var h = Object.create(null);\n var u = [];\n arr.forEach(function(v) {\n if (v in h) return;\n h[v] = true;\n u.push(v);\n });\n return u;\n}\n\nfunction diff(a, b) {\n var h = Object.create(null);\n b.forEach(function(v) {\n h[v] = true; \n });\n return a.filter(function(v) { return !(v in h);});\n}\nsym([1, 2, 3], [5, 2, 1, 4]);\n" + "function sym() {\n var arrays = [].slice.call(arguments);\n return arrays.reduce(function (symDiff, arr) {\n return symDiff.concat(arr).filter(function (val, idx, theArr) {\n return theArr.indexOf(val) === idx \n && (symDiff.indexOf(val) === -1 || arr.indexOf(val) === -1);\n });\n });\n}\nsym([1, 2, 3], [5, 2, 1, 4]);\n" ], "tests": [ "assert.sameMembers(sym([1, 2, 3], [5, 2, 1, 4]), [3, 4, 5], 'message: sym([1, 2, 3], [5, 2, 1, 4]) should return [3, 4, 5].');",