Ajax Principle & Basic Case

An Analysis of the Basic Principles of Ajax Basic concepts Asynchronous Javascript and XML. A technique for creating fast dynamic Web pages with minimal exchange with the server to update the pages Common Cases Search page displays search results without refreshing Registration page prompts for availability of items Tmall Sho ...

Added by bobdabuilder on Mon, 20 Jul 2020 19:16:36 +0300

Problems with Android setPolyToPoly (2)

Problems with Android setPolyToPoly (2) Question: The question is still the last one ( Problems with Android setPolyToPoly (1) ) Problem, which was solved with hardware acceleration in the previous article, but he may have black edges around the drawn quadrilateral on some mobile phones. It is suspected that the trans ...

Added by Dominator69 on Mon, 20 Jul 2020 18:45:18 +0300

References in Java and JNI (strong, soft, weak, virtual)

1. Strong References (Objects) Features: Strong references provide direct access to the target object. Will not be recycled. Two, soft reference (SoftReference class) Features: When GC reclaims based on JVM memory, JVM reclaims when it finds it is out of memory Conditions for freeing up space: JVM found insufficient m ...

Added by trygve on Sun, 19 Jul 2020 18:32:41 +0300

Summarize django knowledge points

1. View functions: Request Object------------- request: 1,HttpRequest.body:) Request original data 2,HttpRequest.path:) A string representing the requested path component (without domain name)           3,HttpRequest.method             4,HttpRequest.GET           5,HttpRequest.POST           6,HttpRequest.FILES 7,HttpResquest.user:) An AUTH_U ...

Added by simon71 on Sun, 19 Jul 2020 17:54:28 +0300

Beego Learning Notes 6: Paging Implementation

Implement Paging 1> Business logic for paging implementation 1->N data are displayed on each page. For the total number of data records M, the number of pages M%N==0?M/N:M/N+1; 2->Page Rendering Paging html Part 3>Switch pages, input parameters, background processing, and retrieve new eligible data 4>Paging method, js paging, and ...

Added by whare on Sun, 19 Jul 2020 17:37:26 +0300

Physical Reserve ORA 01274 Problem Handling

My physical standby failed to start and terminate MRP due to ora 01274 problem.This problem is very simple to handle, but Baidu almost took me to the pit after searching an article, so I wrote down the standard steps of MOS for your friends to refer to. This DG environment was built two weeks ago and needs to be officially switched today.Befor ...

Added by chiefmonkey on Sat, 18 Jul 2020 18:39:03 +0300

Picture deletion for laravel-admin

There is a deep doubt about laravel-admin's picture upload mechanism. Deleting avatar pictures on the user information page will cause an error. It was 1.4 at that time, and later updated 1.5 found that the delete button disappeared directly. If you use image normally in the form during the process of use, the slight ...

Added by sansoo on Sat, 18 Jul 2020 17:36:44 +0300

Picture deletion for laravel-admin

There is a deep doubt about laravel-admin's picture upload mechanism. Deleting avatar pictures on the user information page will cause an error. It was 1.4 at that time, and later updated 1.5 found that the delete button disappeared directly. If you use image normally in the form during the process of use, the slight ...

Added by Joan Collins on Sat, 18 Jul 2020 17:37:13 +0300

Dynamically set the width and height of the imageview in HorizontalScrollView

The demand is as follows: There are two kinds of pictures to display, one is 640*640 and the other is 1920*1080. If it is a 1920 picture, you need to double-click to switch the display mode. By default, the middle part of 1920 is displayed by 640*640, which allows you to swipe left and right to view the entire picture ...

Added by The Bat on Fri, 17 Jul 2020 18:35:19 +0300

Dynamically set the width and height of the imageview in HorizontalScrollView

The demand is as follows: There are two kinds of pictures to display, one is 640*640 and the other is 1920*1080. If it is a 1920 picture, you need to double-click to switch the display mode. By default, the middle part of 1920 is displayed by 640*640, which allows you to swipe left and right to view the entire picture ...

Added by esukf on Fri, 17 Jul 2020 18:36:30 +0300