android - Problem with device recording in the background

In the project, the device needs to be able to record in the background, but once the app enters the background, the surfaceview will be destroyed. When the app is opened again, the surfaceview will be re-created. Camera.stopPreview and camera.starPreview must be executed in the surfaceCreated() met...

学习ing 2017-07-06 10:36:46 0  1  1950

Mybatis mapping problem

Isn't there any problem with this way of writing? Use surface and field names to distinguish mappings. Will mybatis recognize it?

大家讲道理 2017-05-27 17:41:24 0  2  1000

Touch events for edge browser?

The touch event in chrome/webkit is invalid in edge. Edge continues the MSPointer event of IE10+; however, the touch event in edge is turned off by default, as shown in the figure below; "Use two fingers to drag to scroll" of the surface trackpad Operation" is not triggered either on ...

阿神 2017-05-19 10:39:16 0  1  786

javascript - Confusion with a function declaration example in Elevation

"JavaScript Advanced Programming" Chapter 7 Functions, regarding the promotion of function declarations, there is such an example: {code...} The original text of the book says: On the surface, the above code means using a sayHi when condition is true. (); otherwise, use another definition....

淡淡烟草味 2017-06-26 10:50:47 0  2  654

GitHub 带有国旗图标的 commit 是怎么做到的？

今天在 github 上看到一个有意思的项目——它有个 commit 是英国国旗开头的，如下图。我把鼠标移上去可以看到:gb:，这是怎么做到的？中国国旗又该怎么弄？ 项目地址：https://github.com/wagerfield/flat-surface-s...

曾经蜡笔没有小新 2017-05-02 09:23:12 0  3  853

How to use PCL for point cloud fusion?

The ICP algorithm of PCL was used to complete the registration of two point clouds. It is hoped that the point clouds can be further fused, that is, in the synthetic point cloud, redundant overlapping parts are filtered out so that the entire point cloud maintains a reasonable number and the surface...

迷茫 2017-05-18 10:51:35 0  1  2085

python3.x - Question 7 of getting json from python's simulated trading api with oanda

Because we are currently using a simulated account to connect to the api, it is restricted. The account_token of the api can only be used to obtain prices and cannot be used to place orders. Therefore, I hope to log in to the web version of the trading platform through simulation and obtain a sessio...

phpcn_u1582 2017-06-12 09:26:53 0  1  1006

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47 0  1  751

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42 0  1  685

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28 0  1  579

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32 0  1  540

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44 0  1  966

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21 0  1  486