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Django filter versus get for single object?
...alled django-annoying and then do this:
from annoying.functions import get_object_or_None
obj = get_object_or_None(MyModel, id=1)
if not obj:
#omg the object was not found do some error stuff
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UITableViewCell subview disappears when cell is selected
...ckgroundColor = color;
}
}
In Swift 3.1 :
override func setSelected(_ selected: Bool, animated: Bool) {
let color = yourView.backgroundColor
super.setSelected(selected, animated: animated)
if selected {
yourView.backgroundColor = color
}
}
override func setH...
What is the difference between NTFS Junction Points and Symbolic Links?
... as Symlink is to Hardlink in Unix.
http://en.wikipedia.org/wiki/Symbolic_link#Windows_7_.26_Vista_symbolic_link
Windows 7 and Windows Vista support symbolic links for both files and directories with the command line utility mklink. Unlike junction points, a symbolic link can also point to a f...
Alter Table Add Column Syntax
...c NOT NULL IDENTITY (1, 1)
ALTER TABLE Employees ADD CONSTRAINT
PK_Employees PRIMARY KEY CLUSTERED
(
EmployeeID
) WITH( STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
...
How to check Oracle database for long running queries
...SQL that is currently "ACTIVE":-
select S.USERNAME, s.sid, s.osuser, t.sql_id, sql_text
from v$sqltext_with_newlines t,V$SESSION s
where t.address =s.sql_address
and t.hash_value = s.sql_hash_value
and s.status = 'ACTIVE'
and s.username <> 'SYSTEM'
order by s.sid,t.piece
/
This shows locks....
MySQL: selecting rows where a column is null
...= NULL is always false).
See Rule 3 https://en.wikipedia.org/wiki/Codd%27s_12_rules
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String.Empty versus “” [duplicate]
... instead of "".
string a="";
string b=string.Empty;
is translate to
IL_0000: ldstr ""
IL_0005: ldsfld System.String.Empty
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fol...
How to get all groups that a user is a member of?
...pal.WindowsIdentity]::GetCurrent()
$groups = $id.Groups | foreach-object {$_.Translate([Security.Principal.NTAccount])}
$groups | select *
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foll...
Base64 encoding in SQL Server 2005 T-SQL
...coding
FROM (
SELECT CAST('TestData' AS VARBINARY(MAX)) AS bin
) AS bin_sql_server_temp;
-- Decode the Base64-encoded string "VGVzdERhdGE=" to get back "TestData"
SELECT
CAST(
CAST(N'' AS XML).value(
'xs:base64Binary("VGVzdERhdGE=")'
, 'VARBINARY(MAX)'
...
What is the difference between decodeURIComponent and decodeURI?
...
encodeURIComponent
Not Escaped:
A-Z a-z 0-9 - _ . ! ~ * ' ( )
encodeURI()
Not Escaped:
A-Z a-z 0-9 ; , / ? : @ & = + $ - _ . ! ~ * ' ( ) #
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
https://developer.mozi...