Tuples are another important sequence structure in Python. Similar to lists, tuples are also composed of a series of elements sorted in a specific order. Unlike a list, a list can operate on any element and is a variable sequence, while a tuple is an immutable sequence, that is, the elements in the tuple cannot be modified separately.
Tuples c ...
Posted on Thu, 17 Oct 2019 01:52:01 -0400 by manishdugar
A key driver written by Jay himself supports single double click, continuous press and long press; callback is used to handle key events (custom buffeting time), which only takes three steps to create keys, link mapping between key events and callback processing functions, and periodic check of keys.
Source address: https://github. ...
Posted on Wed, 16 Oct 2019 13:32:34 -0400 by kevin_newbie
JSON is a lightweight data interaction format, easy for people to read and write, but also easy for machine analysis and generation, and effectively improve the efficiency of network transmission. It is often used in practical projects. Compared with xml, JSON has many advantages, such as asking duniang, a lot of advantages.
Third party Library ...
Posted on Wed, 16 Oct 2019 10:41:39 -0400 by townclown
In the process of learning MQTT, the following contents help me
https://www.runoob.com/w3cnote/mqtt-intro.html is a basic introduction to MQTT
Https://mosquito.org/api/files/mosquito-h.html this website records almost all the mosquito interfaces you want to know. They all have function profiles. Maybe they can't see any points. Look at the deta ...
Posted on Wed, 16 Oct 2019 06:43:44 -0400 by zoooj
The creation mode is divided into the following types.
Singleton mode: a class can only generate one instance. The class provides a global access point for external access to the instance. Its extension is the limited multiple instance mode.
Prototype pattern: an object is used as a prototype, and multiple new instances similar to the proto ...
Posted on Wed, 16 Oct 2019 05:57:11 -0400 by suigion
In Kubernetes, the IP address of the service and Pod can only be used inside the cluster network, and it is not visible for applications outside the cluster. In order to enable external applications to access the services in the cluster, the following schemes are provided in Kubernetes:
This section mainly introd ...
Posted on Tue, 15 Oct 2019 22:41:02 -0400 by mjm7867
Overview of ACL (access control list)
Access control list is a list of instructions applied to the router interface, which are used to tell the router which packets can be received and which packets need to be rejected.
Access control is the main strategy of network security prevention and protection. Its main task is to ensure that netwo ...
Posted on Tue, 15 Oct 2019 15:35:21 -0400 by trdesigns
The topology of this experiment is as follows:
Complete the establishment of extended ACL on R1 route, and achieve the experimental requirements:
Allow PC1 to access Linux web services;
Allow PC2 to access the ftp service of Linux;
PC1 and PC2 are forbidden to access other Linux services;
Allow PC1 to connect PC2
Experimental st ...
Posted on Tue, 15 Oct 2019 12:55:53 -0400 by nike121
172.24.4.8 is the fip of pod 126.96.36.199.
Create logical router ovn cluster
ovn-nbctl lr-add ovn-cluster
ovn-nbctl lrp-add ovn-cluster ovn-cluster-fip-ns1 00:00:00:65:77:09 100.69.0.1/16
Create logical switch fip-ns1 and connect to ovn cluster
ovn-nbctl ls-add fip-ns1
Posted on Tue, 15 Oct 2019 12:32:02 -0400 by Xorandnotor
Enumerations (enums) are just a way of naming constants. It is a basic data type in C language and a set of named integer constants.
The specification defines "constants" such as states, options, and so on in the code.
Does not participate in memory occupation and release.
The purpose of using enumeration in develo ...
Posted on Tue, 15 Oct 2019 05:42:02 -0400 by puzzle