Programmer Think

1. Basic questions Given a list of numbers, print all odd numbers in the list list1=[22,33,45,67,78] for x in list1: if x%2 !=0: print(x) Given a list of numbers, print all the numbers in the list that can be divided by 3 but cannot be divided by 2 list2=[2,3,6,8,9,10] for x in list2: if x%3==0 and x%2 !=0: print(x) ...

4)IoC configuration (XML format) 4.1)bean Name: bean Type: Label Attribution: beans tag Function: define resources in spring. Resources defined by this tag will be controlled by spring Format: <beans> <bean /> </beans> Basic properties: <bean id="beanId" name="beanName1,beanName2" class="ClassName"></bean&gt ...

1 what is MQ MQ (message queue): translated into message queue. Through the typical producer and consumer model, producers constantly produce messages to the message queue, and consumers constantly get messages from the queue. Because the production and consumption of messages are asynchronous, and only care about the sending and receiving of ...

preface A few days ago, I accidentally saw such a bce library that can balance the coefficients of chemical equations. I thought this was the matching element. I tried according to the examples I saw, and the results The program design is becoming more and more complex, and I don't know his BCE console Exe how can a program of only 104K ...

preface Last blog The Security framework imposes restrictions on requests In, login authentication is added for some requests. As long as the login is successful, you can access the restricted requests. However, this model is certainly not enough. For example: Taobao product page. Merchants can modify commodity prices, but custo ...

catalogue 1, Define Vue components 1.1 three methods of global component definition 1.2 using component to define private components II. data in components III. component switching 4, Component value transfer 4.1 value transfer from parent component to child component 4.2 the child component passes the value to the parent component th ...

java handout reading and learning File class Near the beginning of school, facing the pressure of postgraduate entrance examination and learning, we can relearn the core knowledge in java io stream through java handout books to form our own system. On a deeper level, the time for later study is increasingly reduced and tense. Through reading a ...

1. Notes 1.1 notes - single line notes    ① "#" is a single line annotation, and the Python interpreter will ignore the input after #, and will not execute it.    ② # can be placed on the top and right of the code.    ③ long press the left mouse button to select a single line or multiple lines of ...

1. Tree structure and basic concepts 1.1 tree structure concept Tree is a nonlinear data structure. It is a set with hierarchical relationship composed of n (n > = 0) finite nodes. It is called a tree because it looks like an upside down tree, that is, it has its roots up and its leaves down. Characteristics of tree structure Subtree ...

1, Data visualization 1. What is data visualization Data visualization is a scientific and technological research on the visual expression of data. Among them, the visual representation of this data is defined as a kind of information extracted in a summary form, including various attributes and variables of the corresponding information unit ...