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Efficient SQL test query or validation query that will work across all (or most) databases
...himpsky)
PostgreSQL
SQLite
SELECT 1 FROM DUAL
Oracle
SELECT 1 FROM any_existing_table WHERE 1=0
or
SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Ap...
The 'packages' element is not declared
...ts:
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
targetNamespace="urn:packages" xmlns="urn:packages">
<xs:element name="packages">
<xs:complexType>
<xs:sequence>
...
How do I create a unique ID in Java? [duplicate]
...,'L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
'-','.','_','~'
};
}
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Converting a JS object to an array using jQuery
...r on the www i see lacks the conversion of keys.
– TD_Nijboer
Apr 9 '14 at 11:59
55
You can also ...
How to add image to canvas
...f sample code to draw image on canvas while maintaining the aspect ratio:
http://newapputil.blogspot.in/2016/09/show-image-on-canvas-html5.html
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The modulo operation on negative numbers in Python
...nt result = (2 - N) % 7;
return result < 0 ? result + 7 : result;
(See http://en.wikipedia.org/wiki/Modulo_operator for how the sign of result is determined for different languages.)
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comparing 2 strings alphabetically for sorting purposes
...
"a".localeCompare("b") should actually return -1 since a sorts before b
http://www.w3schools.com/jsref/jsref_localecompare.asp
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Show SOME invisible/whitespace characters in Eclipse
...
AnyEdit
Scroll all the way down: http://andrei.gmxhome.de/anyedit/examples.html
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Visual SVN 安装及客户端使用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...修改配置文件来控制用户权限，另外如果要想以Web方式【http协议】访问，一般还要安装配置Apache，如果是新手，岂不是很头痛？而VisualSVN Serve集成了Subversion和Apache，省去了以上所有麻烦。1.为什么要用VisualSVN Server，而不用Subvers...
Writing/outputting HTML strings unescaped
...ed by Dommer, I suggest you to also use AntiXSS library as suggested phill http://haacked.com/archive/2010/04/06/using-antixss-as-the-default-encoder-for-asp-net.aspx
It encodes almost all the possible XSS attack string.
sh...