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This article mainly explains "what are the real questions of web enterprise interview". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn "what are the real questions of web enterprise interview?"

The real question of the enterprise interview-01

Var arr1= [1,1,1,2,3,3,4,5,6], arr2= [4,4,4,5,5,6,7,8,8,9]

Write a function to realize array merging and deduplication: arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]

Function mergeArr (A1, a2) {

/ / use the object's hash to remove duplicates

Var temp = {}

/ / find an array with a larger length

Var len = Math.max (a1.length, a2.length)

For (var item0; I

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