Programmer Think

preface It's also an interview experience shared by a fan During the summer internship of his junior year, he went ashore with Tencent through three technical aspects and one hr. The questions asked by the interviewer are also quite representative. They compare the test principles and thinking logic, and sort them out for everyone to see ...

Words written before: Sword finger offer brushes the questions for the second time. I hope each question can last for seconds. Record your understanding of the topic from the back to the front. Nearest common ancestor of binary tree Problem description problem analysis Nearest common ancestor: according to the definition of encyclopedia, ...

Why is the interview the difference between #{} and ${} background Due to one-time requirement writing, when using dynamic statement splicing, #{} and ${} are used to get two different result sets Through the review of the questions, we can understand the reasons for asking such questions during the interview Reappearance Write an i ...

1. Exits statement When MySQL treats the EXISTS clause, it still adopts the execution method of nested subquery. As shown in the following SQL statement: SELECT * FROM my_neighbor n LEFT JOIN my_neighbor_apply sra ON n.id = sra.neighbor_id AND sra.user_id = 'xxx' WHERE n.topic_status < 4 ...

Title Description This is the * * JZ 58 symmetric binary tree on Niuke. The difficulty is * *. Tag: "sword finger Offer", "binary tree", "sequence traversal", "iteration", "recursion" Description: Please implement a function to judge whether a binary tree is symmetrical. Note that if a bina ...

I am a graduate of 21 years with one year's work experience. My resume and professional skills are as follows. Now I review and prepare for the interview according to my resume and knowledge. Record date: 2022.1.4 Most knowledge points are only briefly introduced, and the specific contents are reviewed in detail according to the recommende ...

Design patterns (11 common) Seven principles Single principle One class, one responsibility Opening and closing principle Expand opening and modify closing Richter substitution As a supplement to the principle of opening and closing, where the father appears, the subclass can certainly appear Principle: Abstract implementation Dependen ...

1. Introduction to Jason type The Json type is provided after MySQL 5.7, which is a type designed by MySQL combining structured storage and unstructured storage. In some situations, the Jason type is a blessing. Scenario 1: user portraits, labels describing users and other similar scenarios, such as patient health files in Internet hospital ...

Get geographic location information using HTML5 How to use HTML5 geolocation For example, geoml5 supports more precise location functions on modern handheld devices, especially HTML5. First, we need to check whether the user's device browser supports geographic positioning, and if so, obtain geographic information. Note that this feature may ...

Here comes the squid game. Now let's start. Let's see what level you've passed. Without the aid of IDE, see whether your human flesh compiler can compile the correct results. Scala-like functions fun hello() = { println("Hello, World") } hello() a). Does not compile b). Prints "Hello, World" c). Nothing d). Something el ...