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Add operation failed

The addition operation failed. It is recommended to print the data to be added and check whether the key names of the data appear in the data table. If the key names conflict with the data table fields, or there are fields that are not in the data table, the process cannot be performed. add operatio...

宝怡 2019-09-22 12:50:44

When debugging Android on a real machine, logcat is sometimes cleared. Is this an AS operation or a real machine operation?

When debugging Android on a real machine, logcat is sometimes cleared. Is this an AS operation or a real machine operation?

给我你的怀抱 2017-05-16 13:25:38

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

Can't download laravel framework according to video operation

Can't download laravel framework according to video operation

陈姣 2021-08-07 15:23:47

How is this voting option adding operation named .php?

How is this voting option adding operation named .php?

盛情不旧゛ 2019-05-02 18:32:09

javascript - An assignment operation problem

var a=0;b=(a=3)+(a=4);alert(a);alert(b);The result is a=4,b=7. I would like to ask, why is a 4? The assignment operation is from Right to left?

phpcn_u1582 2017-06-26 10:55:04

gvim - Is there a command in vim to undo the last command line operation?

In vim (I use gVim under Windows), we know that u is the command to undo the last editing operation. Is there a command to undo the last command line operation? For example, after I type: set list, I want to cancel the operation directly. Without typing: set nolist, there are other more...

淡淡烟草味 2017-05-16 16:36:35

Laravel+CRUDBooster occasionally logs out automatically during operation

During laravel+CRUDBooster operation, occasionally it will automatically log out or report the following error. The page has expired due to inactivity. Please refresh and try again.

侯永波 2019-11-19 11:37:10

How to standardize the operation of two fields in laravel5.5 where condition?

laravel5.5 How to standardize the operation of two fields in where condition?

天问 2018-09-14 16:43:41

Invalid operation causes constant expression to be invalid

I have the following code and when I define a variable in the constructor I get the error "PHP fatal error: constant expression contains an invalid operation". It works fine when used in Laravel framework. <?phpnamespaceApp;classAmazon{protected$serviceURL=config('api.amazon.service...

P粉418854048 2023-08-22 20:09:10

Why is the PHP configuration of predis operation redis cluster not recorded?

Why is the PHP configuration of predis operation redis cluster not recorded? 21-1 Is there a section in your hand at the end?

@smash 2019-06-29 09:38:32

io - java file operation, how to insert content (not replace content) to a specified location?

Java file operation, how to insert content into a specified location (not replace content)?

大家讲道理 2017-06-12 09:24:18

javascript - How to solve this problem when nidejs environment setting operation keeps happening?

Keep going wrong? Administrator rights issue? But I changed the operation in the D drive directory and it still looks like this.

高洛峰 2017-05-16 13:42:38

ajax operation failed unexpectedly

We use ajax in many places on our website. An instance will sometimes behave erratically, like an ajax call failing. It only works in one specific location - all other locations work as expected. When a failure occurs, the user receives an error message that the operation failed. We are unable to re...

P粉511985082 2023-08-28 16:25:52

javascript - How to optimize jquery loop append operation?

There is a page display function in the project. It is necessary to add canvas tags to the tags to which the specified class belongs. Because there is a query function, a corresponding number of canvas tags must be added according to the amount of data queried. I am now using a loop operation. First...

滿天的星座 2017-06-28 09:27:19

Windows - Help with Java high-precision operation problems

The company's projects required a lot of high-precision operations. At first, we used double-type operations. Later, we found that the accuracy of some values exceeded the ideal range after using double-type operations, so we used BigDecimal to calculate. The current problem is the operation effic...

typecho 2017-06-28 09:22:10

java - Online application, what should be done if the database operation fails?

I would like to ask for advice on online application. If the database operation (insert, update, delete) fails, what should be the processing logic? Return errors to the user? No processing? Executing once? still?

某草草 2017-06-28 09:23:37

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

node.js - In node, an encryption operation takes 69ms, is it acceptable?

An operation of encrypting user passwords is synchronous and takes 69ms. Is it acceptable? If there are a large number of users and multiple people register at the same time, will it cause the node process to crash? Can anyone please explain? .

PHP中文网 2017-05-16 13:31:05