Programmer Think

Topics of this chapter Basic equipment operation Shake it Perform shaking action on the device import time from appium import webdriver from appium.webdriver.webdriver import By from appium.webdriver.connectiontype import ConnectionType des = { "platformName": "Android", "platformVersion": "9", "deviceName": "mac virt ...

unique_ptr unique_ptr is a move only type (move only type, std::mutex, etc.). Combine the factory mode to see its basic usage, and give priority to std::make_unique : (for the factory mode, see my notes: https://zhuanlan.zhihu.com/p/423725151) #include <iostream> #include <memory> class Animal { public: virtual void Print( ...

Common API  String summary * java.lang.String : Is a string class, and the bottom is a string class final Embellished char array,therefore String Many properties are array properties, * * For example, once determined,The length cannot be changed * * 1 Once the string is created,This string object can no longer be changed * * 2 In ...

Basic usage and methods of dictionary 1, Definition of dictionary (1) Dictionary: use {} to identify (2) The structure of the dictionary is to treat it as a collection of {key:value}, key:value pairs, (3) It contains two elements separated by ",". Each element is composed of key and value, with ":" in the middle (4) Keys i ...

The core content of this article: 1. Two different routing configuration methods 2. Related concepts of post and get requests and their interaction with browsers 1. General routing configuration method         settings. "ROOT_URLCONF" in py specifies the location of the urlpatterns confi ...

Character function and string function The analysis of the function part comes from( C + + Resource Network) Find string length strlenString function with unlimited length strcpy strcat strcmpIntroduction to string functions with limited length strncpy strncat strncmpString lookup strstr strtokError message report strerrorCharacter operation ...

catalogue Treemap Introduction to Treemap Inheritance structure of Treemap NavigableMap and SortedMap Treemap underlying data structure Treemap constructor Treemap's put Treemap get getEntryUsingComparator remove of Treemap Success of Treemap The time complexity of Treemap and why red black tree is selected LinkedHashMap Introduct ...

1. Array overview Understanding of array: an array is a collection of multiple data of the same type arranged in a certain order and named with a name, These data are uniformly managed by numbering.Array related concepts: Array nameelementCorner mark, subscript, indexLength of array: number of elements Array features: Arrays are ordered ...

1, Introduction Let's explain what multi tenancy is and what scenarios use multi tenancy. Multi tenancy is a software architecture technology. In a multi-user environment, there is a common system, and attention should be paid to the isolation between data. Take a practical example: Xiaobian has developed a set of H5 program, which is applied t ...

ThreadLocal ThreadLocal is called Thread local variable. It creates a copy of the variable in each Thread. Each Thread accesses and modifies the copy of the variable in this Thread, but the variables between threads cannot access each other. ThreadLocal is not a Thread. ThreadLocal has four methods: ThreadLocal action ThreadLocal allows th ...