Programmer Think

1, Introduction to multitasking 1. General Multitasking allows two functions or methods to execute at the same time. The advantage is that it makes full use of CPU resources and improves the execution efficiency of the program. The concept of multitasking: multitasking refers to multiple tasks at the same time. For example, the computer ...

Summed up some commonly used JS tips to make your code more elegant! 1. Use const definition Don't over declare variables in development, and try to use expressions and chain calls. Then, if you can use ， const ， don't use ， let. After you write too much about this mode, you will find that you can hardly find several places to use &quo ...

day 19 regular expression 1, Regular expression Regular expressions are a tool to simplify complex string problems Match symbol 1. Introduction to re module re module is a system module used by python to support regular related operations Fullmatch (regular expression, string) - judge whether the regular expression exactly ma ...

API The Timer class is used to delay the execution of a task. schedule(TimerTask task, **long **delay) to specify the delay timeSchedule (TimerTask, date time), specify the timeschedule(TimerTask task, **long **delay, **long **period), specify the delay time and repetition periodSchedule (TimerTask task, date, firsttime, * * long * * period), ...

At present, most company project frameworks basically belong to the front-end and back-end separation mode. This mode will involve a front-end and back-end docking problem. It is very necessary to maintain a complete and standardized interface for front-end or back-end services, which can not only improve the docking efficiency, but also make m ...

Class: What are class members Member methods and member variables decorated with static are called class members Member variables decorated with static are called class variables Member methods decorated with static are called class methods What are instance variables Member methods and member variables that are not decorated with static are ...

from sklearn.model_selection import train_test_split #Divide 30% of the data as the test set Xtrain, Xtest, Ytrain, Ytest = train_test_split(wine.data, wine.target, test_size=0.3) clf = DecisionTreeClassifier(random_state=0) #Modeling: Decision Tree rfc = RandomForestClassifier(random_state=0) #Modeling: random forest clf = clf.fit( ...

In the development process, you need to add comments to classes and methods. Class comments are easy to implement. By setting a template, you can automatically create preset comments during creation. Adding comments to methods is not so easy. The main impact is on the processing of parameters. For IDEA, after entering / * * + enter above t ...

realization public class SelectionSort { public int[] selectionSort(int[] A, int n) { //Record minimum subscript value int min=0; for(int i=0; i<A.length-1;i++){ min = i; //Find the minimum value after the beginning of subscript i for(int j=i+1;j<A.length;j++){ ...

list 1. What list A list is a collection used to store different data. 2. Create a list Wrap all the elements to be placed in the list, separated by commas. [1,2,3,4,5] [1,2,3,4,5,'ukd'] The above two are lists, but they are not named, so they cannot be called. We can name the list like this. i = [1,2,3,4,5,'ukd'] print(i) output: L ...