Programmer Think

Using JS to complete simple data verification requirement analysis Use JS to complete the simple data verification of the registration page. It is not allowed to leave the user name or password blank technical analysis from form property -- onsubmit must have a return value. If it is true, the submit is successful. If it is false, it cannot be ...

The dependency in microservice architecture is realized by remote call, and the most common problem in remote call is communication consumption and connection number occupation. In the case of high concurrency, due to the increase of communication times, the total communication time consumption will become less ideal. At the same time, due to t ...

Example analysis 1. Pass in a value in the function and find the corresponding array corner public class Rewriter { public static int fun(int num) { int[] a =new int[] {1,2,3,4,5}; for (int i = 0; i < a.length; i++) { if (a[i] == num) { return i; } ...

Suppose we have the following structure: type User struct { Id int Name string Bio string Email string } We need to verify the validity of the fields in the structure: · the value of Id is in a range. · the length of Name is in the range of none. · Email format is correct. We might writ ...

RadioGroup display multiline implementation steps Radio buttons wrapped in radio group are characterized by radio selection and mutual exclusion, which are often used in projects. If RadioButton implements multi line display, it will lose its original feature. On the Internet, most of them are customized to deal wi ...

YModem transmission mode: YModem, YModem-1K, YModem-g. In YModem-1k, the standard 128 byte transmission is replaced by 124 byte information fast transmission, and CRC teaching and research is used to ensure the accuracy of data transmission. YModem-g cancels the CRC check code of the data, and after sending a data block information, ...

Title: Give you an array, find an interval to minimize the ratio of the number of different numbers in the interval to the length of the interval. Solution: This is a classic score planning problem. Considering the dichotomy answer K, our goal is to find an interval to make Val / len < = k, Val is the number of d ...

Knowledge points Maximum heap: for all nodes i, the key value is less than or equal to the key value of the parent node Question link ALDS1_9_B: Maximum Heap Question content For sequence A, the maximum heap is realized by using the property of the maximum heap thinking For A sequence A containing n el ...

Common algorithms 1. Bubble sorting: Principle: compare two adjacent elements and exchange the elements with large values to the right end Example: public static void bubbleSort(int[] a) { int n = a.length; //In total n-1 Comparison of wheels for (int i = 1; i < n; i++) { for (int j = 0; j < n - i; j++) { ...

Title Description For example, given a range n, you need to deal with the question of whether a certain number M is a prime number (each number is in the range 1-N) I / O format Input format:   The first row contains two positive integers, N and M, which represent the range and number of queries respectively. Next, each row of row M conta ...