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catalogue Characteristics of creative mode Create pattern classification Singleton Pattern Single case introduction Code demonstration ① Hungry Han formula (static constant) ② Hungry Chinese (static code block) ③ Lazy (thread unsafe) ④ Lazy (thread safety, synchronization method) ⑤ Lazy (thread safe, synchronous code block) ⑥ Double ...

Summary CGLIB is a powerful and high performance code generation library. It is widely used in AOP frameworks (Spring, dynaop) to provide methods for intercepting operations. Hibernate, as a popular ORM framework, also uses CGLIB to proxy one-side (many-to-one and one-to-one) associations (another mechanism for delayed collection extractio ...

1, APP activity lottery question          Please write a program to complete the APP lottery. The specific requirements are as follows: If you want to deduct 50 points from users every time you participate in this activity, the winning probability is 10%;The number of prizes is fixed, and you can't draw ...

1, Foreword         In the real world, many objects do not exist independently, and the behavior change of one object may lead to the behavior change of one or more other objects. For example, when the price of a commodity rises, some businesses will be happy and consumers will be sad; Also, when we drive to the intersecti ...

1. Enter a value and return its data type function type(para) { return Object.prototype.toString.call(para) } Copy code 2. Array de duplication function unique1(arr) { return [...new Set(arr)] } function unique2(arr) { var obj = {}; return arr.filter(ele => { if (!obj[ele]) { ob ...

Framework and Design Patterns What is the framework: Framework is semi-finished software that can complete certain functions. What does a framework do: it can accomplish certain functions and speed up application development; Provides a sophisticated program architecture. The relationship between framework and application: who does a ...

PHP advanced features - Reflection and the combination of factory design patterns [explained in combination with the example of laravel admin code] Use reflection to realize the production of factory mode without creating specific factory classes Article address http://janrs.com/?p=833 Reprint without authorization of the author Please indic ...

1, Foreword         In some cases, a customer does not want or cannot directly access an object. At this time, it needs to find an intermediary to help complete a task. This intermediary is the proxy object. For example, you don't have to go to the railway station to buy train tickets. You can buy them through 12306 websit ...

preface Most of those who do java development may have read Alibaba's Java background development manual, which contains some contents about Java background development specifications, basically covering some general and universal specifications, but most of them are concise. This paper will mainly use more cases to explain some specificat ...

This picture is from a unicorn company in Shenzhen Design model of Shenkeng interview questions When I see this topic, I think it's very interesting. Isn't it to remove if else if? Isn't this a typical strategy model? Of course, if else if cannot be completely eliminated by policy mode alone, and if can be eliminated by factory + policy mode ...