mac algorithm - php implements java's mac hmac_sha1 encryption algorithm

Please tell me how to implement Java's encryption algorithm hmac_sha1 in PHP?

迷茫 2017-05-16 13:13:28 0  1  581

es6 Null conduction operator - es6 Null conduction operator

Ruan Yifeng How to use the Null conduction operator in es6. {code...}

某草草 2017-05-19 10:30:39 0  2  1647

javascript - Please explain the following algorithm code

It’s about the code of this algorithm, implemented in javascript, but I don’t understand the algorithm below. Ask God to explain. {code...}

習慣沉默 2017-07-05 10:41:45 0  1  935

Algorithmic issues with php array splitting

Split the string $str = '12,34,5'; into an array $arr = [[1,3,5],[1,4,5],[2,3,5],[2,4 ,5]]; Find the PHP logical algorithm to convert $str to $arr;

習慣沉默 2017-05-16 13:08:40 0  2  852

Java - Looking for an explanation of the following algorithm

It is known that the linear table A of length n adopts a sequential storage structure. Please write an algorithm with a time complexity of O(n) and a space complexity of O(1). This algorithm deletes all data elements whose value is item in the linear table. . {Code...} cannot run after rewriting. He...

扔个三星炸死你 2017-07-05 10:26:05 0  2  1105

Signature verification - How to perform SHA512withRSA algorithm signature in PHP?

After searching, I only found [SHA1withRSA][1] algorithm signature, but not SHA512withRSA.

怪我咯 2017-05-16 13:05:17 0  1  1058

web - nginx location search algorithm problem! ?

First post my server configuration: {code...} The official location search path priority and algorithm are described as follows: To find location matching a given request, nginx first checks locations defined using the prefix strings (prefix lo.. .

黄舟 2017-05-16 17:27:37 0  1  995

The importance of algorithms to phper? How important is it? We sincerely invite PHPer to discuss it.

The importance of algorithms to phper? How important is it? We sincerely invite PHPer to discuss it.

..... 2018-07-05 15:17:08 0  2  1775

Data Mining - How to use python to implement the algorithm in "Analysis of the Influence Maximization Problem of Multiple Social Networks"?

As a python novice, my instructor asked me to use python to implement the algorithm in the paper. I was confused about the technical points required and how to implement the algorithm. Currently, I have finished the Python tutorial by Teacher Liao and am currently reading the networkx documentation....

PHP中文网 2017-05-18 10:58:59 0  1  798

javascript - Questions about JS ternary operator

Why does the result of using string concatenation operator in ternary operator remain unchanged when the condition changes? {Code...} {Code...} However, removing the string concatenation operator and the string before the ternary operator returns to normal {Code...} {Code...} Solution?

天蓬老师 2017-05-19 10:17:40 0  3  639

java - Precision issues in three-point collinearity and other point-based algorithms

In the algorithm for calculating the collinearity of three points, I tried to calculate that the slope of any two straight lines is the same and use Heron's formula to calculate the area to be 0. The problems encountered are as follows: the length cannot be expressed accurately, such as (1,1 ), the ...

为情所困 2017-05-27 17:40:03 0  1  587

python3.x - Problem with Python not operator

{Code...} {Code...} As above, False will be calculated as 0 when operated directly. When using the logical operator not, the value of not(1) is False or 0. But why does not(1) directly enter the arithmetic operation and then the result of recalculation is False? This is similar to Python's algorithm...

phpcn_u1582 2017-06-22 11:52:39 0  3  1301

javascript - Is... in the following code a spread operator or an operation operator? What does it mean to write like this?

Code in vuex {code...} What does... in front of mapState mean? What is the difference between adding this and not adding this? I have seen the relevant documentation of the spread operator and the operation operator, but I still don’t quite understand it. I would like a more detailed explanation. .

漂亮男人 2017-06-26 10:52:17 0  3  906

PHP operation method

<?php$x = 5;$y = 6$water = $y-- + $x--;echo $water;The result is 13. Don’t understand? Find the algorithm for operation = 13 $paper = ++$x + $x++;$water = $y-- + $x--;echo $water + $paper;?>

爱心传递 2019-07-22 15:08:13 0  1  1286

Template ternary operator invalid

The ternary operator written after value does not respond, but replacing {$vo.title} with the ternary operator works. What is the reason?

  2018-09-27 23:42:17 0  4  1867

Algorithm - How to implement QQ multi-person chat avatar in Java

As shown in the figure 1: Please note that pictures cannot be superimposed on each other 2: It is best to use a universal algorithm. It is best not to hard-code the x and y positions 3: It is best to be universal for N pictures. I tried drawing curves to intercept but failed. The amount of calculati...

高洛峰 2017-05-17 09:57:55 0  1  551

c++ - the average of two float point numbers without operator/?

As in the title, integers can use bit operations, how to solve floating point numbers? Due to the word limit of the title, the original text is how to calculate the average of two float point numbers without operator /?

巴扎黑 2017-07-03 11:41:47 0  2  1013

javascript - An algorithm question in front-end interview

Today, I have an interview in the afternoon. During the second interview, there was an algorithm question. I know nothing about algorithms. Please ask someone to help me. The question is to implement a function that calculates addition, subtraction, multiplication and division of parentheses. The in...

给我你的怀抱 2017-05-19 10:27:19 0  11  1506

Use the BFS algorithm to explore the graph and output the shortest path

The goal of the program is to pass through various airports and output the shortest path between PHX and BKK using a breadth-first search algorithm. However, I'm having trouble printing the results. The expected output (shortest path) is: PHX->LAX->MEX->BKKconstairports='PHXBKKOKCJFKLAXMEXE...

P粉633075725 2023-09-03 11:42:48 0  2  654

A Java mac check domain algorithm. Can any expert help rewrite it into a PHP version?

A Java mac check domain algorithm. Can any expert help rewrite it into a PHP version? Message format: Domain 0 | Domain 1 | Domain 2 | ... | Domain n Domain n is the MAC verification domain {code...}

淡淡烟草味 2017-06-26 10:49:17 0  1  806