Concurrency - How does the nginx plug-in implement time-consuming operations in a non-blocking manner?

Problem description: Everyone knows that the reason why nginx has great performance is based on its asynchronous and non-blocking nature. Therefore, when developing nginx plug-ins to handle network requests, you must remember to perform certain time-consuming operations in a blocking manner. Otherwi...

phpcn_u1582 2017-05-16 17:12:26 0  1  478

javascript - There are too many table columns. Is there any plug-in that can provide column sorting and selection of columns to display?

The table has too many columns. Is there any plug-in that can provide the function of sorting columns and selecting columns to display? For example, check the columns that need to be displayed. I have seen this function when working on jquery mobile, but the plug-in on the web side cannot be found. ...

PHP中文网 2017-06-26 10:55:14 0  2  940

javascript - js code to obtain verification code countdown problem

When getting the verification code countdown (for example, the countdown is 40 seconds), I click the link to go to another page (_self, this page jumps, no new tab is opened). After a period of time, I click the back button and return to the countdown page. The countdown still starts from 40s. The d...

漂亮男人 2017-07-05 10:50:31 0  3  959

mysql - Record the last newly added ID in PHP

I want to save the record ID last inserted into the database for download, and read it again when the method is called during download. After inserting, the original record ID is overwritten. How to achieve better performance? Save to database? Save to file? Will the cache be flushed?

習慣沉默 2017-05-16 13:12:21 0  2  533

javascript - bootstrap and daterangepicker date plugin picker issues

My project is based on bootstrap 2, but I use the daterangepicker date plug-in on a page. This plug-in is based on bootstrap 3. Introducing bootstrap 2 and 3 styles at the same time will cause conflicts. How can I make the bootstrap 3 introduced in this page only work with dates? The plug-in takes e...

滿天的星座 2017-05-18 10:49:14 0  2  580

angular.js - Transition animation for angularjs ui-router

I would like to ask all the experts in angularjs if there is any useful animation plug-in when using ui-router and $state.go('') to jump? ngAnimate has no effect...

習慣沉默 2017-05-15 17:06:40 0  3  726

About designing a function that increments a field in mysql.

I have a simple table with three fields, tag_id, user_id, user_tag_id. I want when I insert a record (inserting a known tag_id and user_id), the user_tag_id should be incremented under the condition that user_id = the currently inserted user_id. 1. How to implement this requires writing mysql...

世界只因有你 2017-06-28 09:23:38 0  2  991

nosql - Can someone explain in detail how mongodb's index work saves time?

MongoDB indexes can usually greatly improve query efficiency. Without indexes, MongoDB must scan each file in the collection and select those records that meet the query conditions when reading data. The query efficiency of scanning the entire collection is very low, especially when processing a lar...

黄舟 2017-05-02 09:25:14 0  2  620

javascript - The loading animation effect of the page is not displayed?

1. The project I am working on now is a data table page. Since the background query takes a long time, in order to improve the user experience, a load animation is added. There is no problem with the plug-in for loading animation. However, during the execution of the method, it is found that the ani...

迷茫 2017-05-19 10:18:28 0  4  698

javascript - Is there a time selection plug-in similar to High Speed ​​Rail Butler?

To display holidays, holidays, and lunar calendar, I used calendar.js to implement it. It can only display one month. You need to click the button to display the next month. I will refer to this https://github.com/zhangchen2... The effect is completed.

phpcn_u1582 2017-05-16 13:35:34 0  4  526

Looking for a javascript map marker plug-in

1. Is there such a JavaScript plug-in that can achieve the following effect? ​​The three objects on the left can be dragged to the map on the right. After dragging to the map and releasing the mouse, a mark will be left on the map (used to Mark the map location), and an editable dialog box will pop ...

怪我咯 2017-05-18 10:49:58 0  1  603

How to bind a shortcut command in vim to open two plug-ins at the same time

For example, I use two very popular plug-ins, NERDTree and Tagbar, in vim. Generally, I open these two plug-ins at the same time after opening the editor. It is very troublesome to type twice every time. I wonder if I can use them To synthesize a command, such as dev, to achieve the following effect...

高洛峰 2017-05-16 16:42:58 0  2  639

javascript - Is there any way to memorize documents?

It’s easy to get distracted when reading technical documents, and you forget what you finished reading after a while. How can you improve the efficiency of reading documents? Can you remember it after watching it?

我想大声告诉你 2017-05-19 10:39:27 0  13  1226

Laravel maatwebsite/excel problem of automatically converting numbers to scientific notation

This plug-in automatically converts long numbers into scientific notation when importing excel files into the database, resulting in a loss of numerical precision. Do you have any good solutions?

给我你的怀抱 2017-05-16 16:47:28 0  2  1109

How to use vim to quickly organize numbers

There is such a number in my file: {Code...} I want to use vim to organize it like this: {Code...} This file is very long, and it will definitely not be efficient if I work it out bit by bit. Is there any way to record macros? Any solution?

phpcn_u1582 2017-05-16 16:35:48 0  1  838

angular.js - $ionicScrollDelegate.getScrollPosition() cannot obtain the corresponding height after entering the page for the first time

1. It is a time selection plug-in found online as shown in the picture. Click on the date and the following box will pop up. When ionic is started for the first time, this page will not be refreshed. $ionicScrollDelegate.getScrollPosition() cannot obtain the height. If the scrollTo method is used, t...

大家讲道理 2017-05-15 17:07:21 0  1  818

javascript - vue routing error written with scaffolding! ! ! Urgent! Urgent! ! !

Image description: An error occurred when inserting the routing HTML code. Baidu translated it and said: <Router Link> Are you registering the component correctly? For recursive components, make sure to provide the "name" option. Don't even know what's wrong? Thank you all. !...

仅有的幸福 2017-06-15 09:22:05 0  2  762

node.js - virtualbox virtual machine ununtu16.04 system uses npm to install bcrypt error

I used ubuntu16.04 created by virtual box in the win7 system. When I used npm install bcrypt to install the bcrypt plug-in, I encountered the following error: {code...} In the ubuntu system that I used directly before, I used the same method and the above did not appear. Error, please help me solve ...

天蓬老师 2017-05-24 11:38:57 0  1  1840

javascript - How to solve the problem that the js part of the vscode vue file does not have the desired code prompt (non-highlighting)?

1. When vscode edits the js code in the vue file, there is no prompt when writing the js file, as shown below. There is no prompt when it is imported from other files. 2. I have tried various plug-ins and configurations, but they only solved the problem of code snippets and highlighting. Searching o...

高洛峰 2017-05-19 10:29:54 0  1  649