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This chapter describes the lighted event process of keyboard and mouse. KeyPress event KeyPress events occur when a key on the keyboard is depressed Precise Description: Press a key and we will trigger the KeyPress event with focus at this time. Th ...

1. Byte buffer stream 1.1 Byte Buffer Stream Construction Method [Application] Introduction to Byte Buffer Stream lBufferOutputStream: This class implements buffering output streams. By setting such an output stream, the application can write ...

We installed dlib19.17 and face_recognition in Windows 10 environment. For details, please refer to: https://blog.csdn.net/weixin_41943311/article/details/91866987 https://blog.csdn.net/weixin_41943311/article/details/98482615 Then, we use dlib19.17+face_recognition to classify family photos, whic ...

Date: 2019--8-12 1. Converting strings to integers (Examining knowledge points: strings and programmatic conversions) Topic Description Converting a string to an integer (realizing the function of Integer.valueOf(string), but returning 0 when string does not meet the number requirement) requires t ...

General methods of strings 1.concat stitching string var a="123"; var b="456"; console.log(a.concat(b)); //123456 console.log(a.concat(b).concat(a)); //123456123 2.indexOf finds characters from left to right and returns an index or -1 Note: No matter which direction ...

1. Advantages of reducing redis memory usage 1. Help reduce the time required to create and load snapshots 2. Improving the efficiency of loading and rewriting AOF files 3. Shorten the time required to synchronize from the server 4. Allowing redis to store more data without adding additional hardware 2. Short structure Redis provides a se ...

Property name describe prototype Adding attributes and methods to objects constructor Returns an array object reference length Returns the number of array elements Method name describe Return Change the original array concat() Connect multiple arrays New array after connection N join('') Combines all elements in an array into ...

The direct embodiment of Node.js asynchronous programming is callback. Asynchronous programming relies on callbacks to achieve, but it can not be said that the program will be asynchronous after using callbacks. Callback functions are called when the task is completed. Node uses a large number of callback functions. All of Node's API s suppo ...

This is the content of "Principles and Interface Technology of Microcomputer" in the course design of the school. I have written some drawbacks, but basically realized the operation function. I will record it temporarily for future review, which is also for your reference. Defects: 1. Only fixed length input (32 bits corresponding t ...

Simple learning of JS hash lists The HashTable class, also known as the HashMap class, is a Hash list implementation of the Dictionary class. The purpose of the hash algorithm is to find a value in the data structure as quickly as possible. In the previous study, if you wanted to get a value in a data structure, you had to traverse the entire d ...