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Advantages of TypeScript Support ES6 specificationPowerful IDE supportAngular2 development language IDE advantages Type check Typescript online complier http://www.typescriptlang.org/play/index.html Typescript local complier Install node.js, npm npm install typescripttsc --version New string features Multiline string``    ...

Before reading this article, it is recommended to read it first Android event distribution mechanism (1) - source code analysis_ z936689039 blog - CSDN blog 1. Case 1 We have to use the ps summary found in ViewGroup: 1. When ACTION_MOVE and action_ When the up event arrives, if no child element handles the event (mFirstTouchTarget==null), ...

192.168.80.51Main db01192.168.80.11From web04192.168.80.9From web03 1. Cluster preparation To realize master-slave, please back up the data first First, a single node redis has been installed Single node installation https://blog.csdn.net/ncnhhm/article/details/121443981 Master node profile daemonize yes bind 192.168.80.51 port ...

kafka supports transactions from version 0.2.11. This document gives a brief description of kafka transactions, java code examples, some simple descriptions of the code, and relevant precautions. I hope it can be helpful to friends who need to use kafka transactions.On June 28, 2017, Kafka officially released version 0.11.0.0. From this version ...

Picture decodingThe common image compression formats are mainly PNG and JPEG. In iOS program development, it is generally not necessary to obtain the decoded data of a picture, but if you need to operate on pixels, you may need to know how to obtain relevant pixel values.Bitmap image (bitmap) is composed of multiple pixel arrays. When we decode ...

Application of interface: factory mode Factory mode: it realizes the separation of creator and caller, that is, the specific process of creating objects is shielded and isolated, so as to improve flexibility.In fact, both design patterns and object-oriented design principles are to make the development project easier to expand and maintain. The ...

Run a simple Grpc Previously, we successfully installed the Go + running environment. Next, we run a simple Grpc to learn how to reference packages. Dependent package installation For references to dependent libraries, Go + has made many optimizations to make the code easier to write. Just like when printing, Go needs to import "f ...

For example: int []arr= {25,69,80,57,13,}; Basic idea of bubble sorting (from small to large): compare a[0] with a[1]. If the former is greater than the latter, exchange it before and after, otherwise no operation will be done. After this step, the larger value will be in the latter, that is, a[1]. Now we need to continue to compare to the bac ...

This article mainly introduces the use of MongoDB's bulkWrite() method by comparing batch and non batch operations. Incidentally, it is compared with relational database MySQL to compare the efficiency of these two different types of databases. If you just want to learn how to use bulkWrite(), just look at the first part.Test environment: win7 ...

The flag package built in Go language realizes the analysis of command line parameters. The flag package makes it easier to develop command line tools. os.Args If you simply want to get command line parameters, you can use os.Args to get command line parameters like the following code example. func main() { // Get command line parameters // o ...