The calculation of addition, subtraction, multiplication and division in this chapter

In this chapter I create 4 addition, subtraction, multiplication and division equations. If the route is not set, there will always be a page error, but if the routing rules are set in the route, addition, subtraction, multiplication, and division can be performed and displayed. Why is this? This is...

phpcn_u17776 2017-08-27 11:25:18 0  1  1488

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  1637

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  579

My multiply (*) command doesn't calculate

My asterisk is not working, when I do the calc() function and do the multiplication notation (i.e. the asterisk), the function is not working. I want to solve this problem as soon as possible because I am learning programming and I need your help in solving it - - mark size: calculation (var(--cell-...

P粉883223328 2024-04-04 21:18:17 0  1  443

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 - 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  637

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

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

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  1099

JavaScript bitwise NOT operator (~)

See the lottery code {code...} of <TFC2017/> Why can the ~ operator round numbers?

伊谢尔伦 2017-06-28 09:29:08 0  1  1030

Bit Operations - Why ~8=-9, ~-8=7 in javascript?

After studying the relevant information on bitwise operations in JavaScript, I really don’t understand the inverted bitwise operation. I don’t understand why the inverted bitwise operation is not the maximum number - the current value, but ~8=-9, ~-8=7?

滿天的星座 2017-05-18 10:59:22 0  5  1012

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  1057

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

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

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

How to perform division operation on variables in nginx?

For example, the requested url is {code...} I want to calculate the number 100000, divide it {code...} and then rewrite it to the directory corresponding to the id, but if you do this, the value of the id It will become 100000/10000 instead of 10. How to implement this division operation in nginx?

怪我咯 2017-05-16 17:30:00 0  1  787

Understanding the ternary operator in Python [duplicate]

I'm currently transitioning from JavaScript to Python, and I'm wondering if Python has a ternary operator similar to JavaScript. In JavaScript, I would write a ternary operation like this: leta=10;letvalue=a>5?'Greater':'Lesser';console.log(value);//Output: 'Greater' This is useful for writing co...

P粉877114798 2023-09-21 18:46:04 0  1  856

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