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This article mainly introduces "what are the common algorithm problems in the web front-end interview". In the daily operation, I believe that many people have doubts about the common algorithm problems in the web front-end interview. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for everyone to answer the "what are the common algorithm questions in the web front-end interview?" Next, please follow the editor to study!

Q1 determines whether a word is a palindrome or not.

Palindromes refer to changing the position or reversing the same words or sentences below to produce the interest of the first and last loops, called palindromes, also called palindromes. For example, mamam redivider.

It is easy for many people to think of using for to reverse the alphabetical order of strings and then match them. In fact, the important thing to examine is the implementation of reverse. In fact, we can use ready-made functions to convert strings into arrays, this idea is very important, we can have more freedom to do some string operations.

Function checkPalindrom (str) {return str = = str.split (''). Reverse (). Join ('');}

Q2 removes the duplicate values of a set of integer arrays

For example, input: [1, 13, 24, 11, 11, 14, 14, 1, 2]

Output: [1, 13, 24, 11, 14, 2]

The duplicate 11 and 1 elements need to be removed.

This question appears in many front-end interview questions, which mainly examines the individual's use of Object and uses key to screen.

/ * unique an array * * / let unique = function (arr) {let hashTable = {}; let data = []; for

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