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Random record from MongoDB
... enable geospatial indexing on a collection:
db.docs.ensureIndex( { random_point: '2d' } )
To create a bunch of documents with random points on the X-axis:
for ( i = 0; i < 10; ++i ) {
db.docs.insert( { key: i, random_point: [Math.random(), 0] } );
}
Then you can get a random document f...
Doctrine - How to print out the real sql, not just the prepared statement?
...ries I use
sudo vim /etc/mysql/my.cnf
and add those 2 lines:
general_log = on
general_log_file = /tmp/mysql.log
and restart mysql
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follo...
How to check if a string contains a substring in Bash
...egex in a bash script, this worked perfectly!
– blast_hardcheese
Feb 14 '12 at 5:10
114
The =~ op...
What is process.env.PORT in Node.js?
... and stop at the first available value if any.
– HoCo_
May 13 '18 at 22:09
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How to append text to an existing file in Java?
...catch(IOException ex){ ex.printStackTrace(); }
– php_coder_3809625
Aug 18 '16 at 12:12
...
Table Header Views in StoryBoards
...eak var audioView: UIView!
Then in tableview code I did:
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
return audioView
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 142
}
It work...
【解决】App Inventor 2 如何下载/保存网络图片？ - App Inventor 2 中文网...
...片文件会原路径进行覆盖。
原文：https://mp.weixin.qq.com/s?__biz ... Z7p_eYX-6IMoiytE#rd
如何实现设置用户头像功能呢？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...ference/components/media.h ...
hello，哥？可以帮忙解答一下吗{:8_380:}liuweichao 发表于 2024-11-18 16:48
hello，哥？可以帮忙解答一下吗
已纳入需求池，有序解决，不接受催促，谢谢理解App Inventor 2 发表于 2024-11-18 16:58
已纳入需求池...
iOS Equivalent For Android Shared Preferences
...alue, forKey: key)
}
}
Example
//set
Configuration.value(value: "my_value", forKey: "key_1")
//get
let myValue = Configuration.value(defaultValue: "default_value", forKey: "key_1")
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Replace multiple strings with multiple other strings
...d a %3";
let pets = ["dog","cat", "goat"];
then
str.replace(/%(\d+)/g, (_, n) => pets[+n-1])
How it works:-
%\d+ finds the numbers which come after a %. The brackets capture the number.
This number (as a string) is the 2nd parameter, n, to the lambda function.
The +n-1 converts the string ...