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How to drop SQL default constraint without knowing its name?
...ame
from sys.tables t
join sys.default_constraints d on d.parent_object_id = t.object_id
join sys.columns c on c.object_id = t.object_id and c.column_id = d.parent_column_id
where t.name = @table_name
and t.schema_id = schema_id(@schema_name)
and c.name = @col_name
--print @Command
execu...
Javascript web app and Java server, build all in Maven or use Grunt for web app?
...ts concurrent by default and uses streams to avoid temporary writes to the file system which can considerably speed up your build. Gulp is very idiomatic and has an emphasis on code > configuration and while this gives you a lot of power it's is not ideal for teams that don't have a core competen...
How can I get the ID of an element using jQuery?
...
The jQuery way:
$('#test').attr('id')
In your example:
$(document).ready(function() {
console.log($('#test').attr('id'));
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="test"...
How to change the background color of the options menu?
...rgs[0] = mContext is only set during running calls to
http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/2.3.3_r1/android/view/LayoutInflater.java/#352
protected void setMenuBackground(){
getLayoutInflater().setFactory( new Factory() {
@Override
...
Truncating all tables in a Postgres database
...This is extremely fast, because Postgres copies the whole structure on the file level. No concurrency issues or other overhead slowing you down.
If concurrent connections keep you from dropping the DB, consider:
Force drop db while others may be connected
...
What does the -ObjC linker flag do?
...
This flag causes the linker to load every object file in the library that defines an Objective-C class or category. While this option will typically result in a larger executable (due to additional object code loaded into the application), it will allow the successful creat...
Path.Combine absolute with relative path strings
...toryInfo.FullName will work on a fictitious path. The problem is when the file actually exists, the executing process needs FileIOPermission - true for both APIs. (see MSDN)
– Paul Williams
Jan 30 '15 at 19:06
...
What is the most efficient/elegant way to parse a flat table into a tree?
... syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL
SELECT m.* FROM MyTABLE AS m JOIN MyTree AS t ON m.ParentId = t.Id
)
SELECT * FROM MyTree;
I tested recursive queries in MySQL 8.0 in my presentation Recursive Query Throwdown in 2017.
Below is...
Rebasing a branch including all its children
...e with mass automated rebasing.
So here it is. Use it by saving it into a file called git-auto-rebase in your PATH. It's probably also a good idea to use the dry run (-n) option before you try it for real. It may be a little more detail than you really want, but it will show you what it's going to ...
Find all records which have a count of an association greater than zero
... To remove the duplicates, use
Project.joins(:vacancies).group('projects.id')
UPDATE:
As pointed out by @Tolsee, you can also use distinct.
Project.joins(:vacancies).distinct
As an example
[10] pry(main)> Comment.distinct.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, ...