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Converting an array of objects to ActiveRecord::Relation
...e clause will generate a SQL statement with IN that looks something like:
SELECT .... WHERE `my_models`.id IN (2, 3, 4, 6, ....
Keep in mind that the ordering of the array will be lost - But since your objective is only to run a class method on the collection of these objects, I assume it won't b...
mingw-w64 threads: posix vs win32
...API) which GCC can then link in to enable all the fancy features." So if i select the win32 model, GCC can still enable all the features, because it makes use of winpthreads? But in the bullet below, you write "win32: No C++11 multithreading features". I don't understand. Does "which GCC can then li...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...插件目录我们能看到innodb_engine.so和libmemcached.so：
mysql> SELECT @@plugin_dir;
+------------------------------+
| @@plugin_dir |
+------------------------------+
| /usr/local/mysql/lib/plugin/ |
+------------------------------+
此外还需要导入Memcached插...
jquery how to empty input field
...
On a related note, .val([]) can also unselect any selected option in select list... not so much with .val(''). Best thing about it is it's cross-browser support. P.S: This is an alternative to only other efficient cross-browser solution - $("select option").prop("...
Eclipse: Can you format code on save?
...ces, choose Java --> Editor --> Save Actions. Check the Perform the selected actions on save, and check the Format source code box.
This may or may not be available in previous versions of Eclipse. I know it works in:
Version: 3.3.3.r33x_r20080129-_19UEl7Ezk_gXF1kouft<br>
Build id: M...
Connecting to Azure website via FTP
...re portal the deployment credentials can be set by going to App Services / select relevant app service item / in the Deployment section / Deployment Center / FTP / Dashboard. You can either chose to use the preprovided App Credentials or assign User Credentials.
In the previous generation azure por...
SQL Server 2008: how do I grant privileges to a username?
...'
If you need to be more granular, you can use the GRANT command:
GRANT SELECT, INSERT, UPDATE ON dbo.YourTable TO YourUserName
GRANT SELECT, INSERT ON dbo.YourTable2 TO YourUserName
GRANT SELECT, DELETE ON dbo.YourTable3 TO YourUserName
and so forth - you can granularly give SELECT, INSERT, UP...
How to fix “Incorrect string value” errors?
...ify that the tables where the data is stored have the utf8 character set:
SELECT
`tables`.`TABLE_NAME`,
`collations`.`character_set_name`
FROM
`information_schema`.`TABLES` AS `tables`,
`information_schema`.`COLLATION_CHARACTER_SET_APPLICABILITY` AS `collations`
WHERE
`tables`.`table_sche...
How do I install and use curl on Windows?
...s window will popup. Click the Environment Variables button at the bottom.
Select the "Path" variable under "System variables" (the lower box). Click the Edit button.
Click the Add button and paste in the folder path where curl.exe lives.
Click OK as needed. Close open console windows and reopen, so...
Visual Studio can't build due to rc.exe
...ave Visual Studio 2017 or 2019, and you installed Build Tools 2015 without selecting to install its own 2015 Windows SDK (default installation does not install it!), and are trying to use it to compile, you may run into this problem.
In my case, I already had Visual Studio 2017. When I tried to use ...