Tag：efficiency
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Time：2020-3-29
I. Preface Human beings are great because they can create and use tools! If a worker wants to do a good job, he must first use sharp tools. Efficient tools and methods not only maximizeSave us timeTo some extentStay focusedIn order to achieveYield twice the result with half the effortThe effect. But it doesn’t help […]
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Time：2020-3-27
Hybris Cache (1 )The Hybris Cache is a part of the Hybris persistence layer.(2) It improves the performance of a single server node by reducing the amount of database queries.(3) It transparently stores search results, item attributes, and item instances in memory. The purpose of hybridis cache is to reduce the access to DB layer […]
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Time：2020-3-23
Introduction to spark SQL Spark SQL is a module of spark to deal with structured data. It provides a programming abstraction called dataframe and functions as a distributed SQL query engine.The analogy of hive is to transform hive SQL into map reduce, and then submit it to the cluster for execution, which greatly simplifies the […]
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Time：2020-3-21
1. Having and where: Where and having act on different objects. Where acts on the basic table or view to pick out the tuples that meet the conditions. Having acts on a group and is generally used with group by. 2. Any and all: All is to see the later content as a whole, […]
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Time：2020-3-12
According to media reports, tens of millions of enterprises have started home-based telecommuting in just a few days. The topic of “telecommuting” has also become the most popular topic of discussion in all major community communities, which is basically at the head of all major media and communities. Among them, “video conference” and “remote office” […]
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Time：2020-3-2
Author: yangke Ncnn is a high-performance neural network forward computing framework optimized for the mobile terminal by Tencent open source. In the AOE open source project, we provide the ncnn component. Let’s take the sample of squeezenet object recognition as an example to talk about the design and usage of the ncnn component. Disadvantages of […]
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Time：2020-2-20
Good things, collection. Turn to kill the mouse! Greatly improve MAC keyboard efficiency with these four apps At the beginning, personal computers did not support “mouse”. All users had to input monotonous and complex commands to achieve the most basic functions. That’s why scientists at that time urgently needed to develop a more simple and […]
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Time：2020-2-13
Modern programmers, no matter the front-end, mobile end, back-end or even some UI and products are heavy users of GitHub. In product design, architecture design, technology selection, looking for technical solutions for a specific function and other scenarios, GitHub is a good channel. Indeed, in many cases, they can find the wheel made by others […]
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Time：2020-2-6
Without recursion and standard library, all subsets of a list can be obtained by two for loops L = [1, 2, 3, 4] List = [[]] For I in range (len (L)): (fixed length) For J in range (len (list)): sub_List = List[j] + [L[i]] if sub_List not in L: List.append(sub_List) print(‘List =’, List) Main ideas: All elements in the variable length list will be repeatedly traversed until the fixed length L […]
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Time：2020-2-6
Recently, some development friends asked me how to improve my ability. In retrospect, I’ve done IOS development for so long, and I’ve also had the kind of “let me do a function to realize a requirement I will do, but I don’t know how to improve next.” During this period, I’ll try to list the […]
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Time：2020-1-18
The 11th long holiday is about to pass. This year, I didn’t go home. I was just watching the Chinese version of C language standard 5.0. I saw the is operator and as operator yesterday. These two symbols are also used in normal projects. I haven’t compared their efficiency. Take advantage of the free time […]
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Time：2020-1-6
Using three powerful tools of Google to improve the working ability of the team Label (space separated): see the sun through the clouds What are the three powerful tools of Google In fact, the title says that in fact, Google’s three powerful tools are Google’s documents, email and schedule. Here I’m going to talk about […]
