Given an array of non-empty integers, each element occurs twice except for one. Find the element that appears only once. Description: Your algorithm should have linear time complexity. Can you do this without using extra space? See the LeetCode website for an example. The copyright belongs to Lankou Network. Commercial reprint please contact the official authorization, non-commercial reprint...

Description: Give you two binary strings and return their sum (in binary). The input is a non-empty string and contains only the digits 1 and 0. See the LeetCode website for an example. The copyright belongs to Lankou Network. Commercial reprint please contact the official authorization, non-commercial reprint please indicate the source.

The biggest problem encountered in the process of communication with the big guy is that each other do not understand the data format and other doubts, here is also a universal data transmission process and byte stream and other content, some piecemeal, please forgive me

Two days ago to work, suddenly leaflet gave me a message: brother, you see these two pieces of code is what mean? At first glance, this code looks both familiar and unfamiliar. I seem to have seen it somewhere, but I don't seem to use it very often. I drank water, and thought calmly 3s: hey, isn't this the bit operator? I've learned it in college before, and I've seen it in the React source before. Little leaf: brother, can you tell me what this is? Me: No problem, wait...