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How to create a unique index on a NULL column?
...ndex actually excludes records from the index, whereas the other solutions transform the null into a useful unique value. Be aware of the difference.
– Suncat2000
Feb 9 '12 at 14:24
...
jQuery: Return data after ajax call success [duplicate]
...t for async and await you can use Babel:
https://babeljs.io/docs/plugins/transform-async-to-generator/
or with a slightly different syntax a generator based approach like in co or Bluebird coroutines:
https://www.npmjs.com/package/co
http://bluebirdjs.com/docs/api/promise.coroutine.html
More...
How to print a number with commas as thousands separators in JavaScript
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Below are two different browser APIs that can transform Numbers into structured Strings. Keep in mind that not all users' machines have a locale that uses commas in numbers. To enforce commas to the output, any "western" locale may be used, such as en-US
var number = 123...
What are the differences between 'call-template' and 'apply-templates' in XSL?
...I typically solve problems like adding the text of some subnodes together, transforming select nodesets into text or other nodesets and the like - anything you would write a specialized, reusable function for.
Edit:
As an additional remark to your specific question text:
<xsl:call-template na...
JSON and XML comparison [closed]
...ucture validation. Makes it also possible to create new datatypes
XSLT for transformation into different output formats
XPath/XQuery for extracting information in deeply nested structures
built in support for namespaces
Con:
Relatively wordy compared to JSON (results in more data for the same am...
What is WEB-INF used for in a Java EE web application?
...ists of a plain copy process in other cases the mapping process includes a transformation, such as filtering or compiling and others.
One example: The WEB-INF/classes folder will later contain all compiled java classes and resources (src/main/java and src/main/resources) that need to be loaded by t...
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C语言判断文件是否存在 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ccess(const char *filename, int amode);amode参数为0时表示检查文件的存在性，如果文件存...用函数access，头文件是io.h，原型：
int access(const char *filename, int amode);
amode参数为0时表示检查文件的存在性，如果文件存在，返回0，不存在，返...
mfc 画圆角矩形 - C/C++ - 清泛网 - 专注C/C++及内核技术
mfc 画圆角矩形先看效果：画圆角矩形的函数：BOOL DrawRoundRect( CDC* pDC, LPCRECT lprcRect, SIZE sizeRound, DWORD dwColorFrame = COLOR_...先看效果：
画圆角矩形的函数：
BOOL DrawRoundRect( CDC* pDC, LPCRECT lprcRect, SIZE sizeRound, DWORD dwColorFrame = COLOR_...
stdbool.h C99标准杂谈 - C/C++ - 清泛网 - 专注C/C++及内核技术
...99标准杂谈include <stdbool.h> 找不到头文件？？？bool 是C++中的关键字，C中不支持所以C99标准中引入了头文件 stdbool.h，包含了四个用于布尔型...include <stdbool.h> 找不到头文件？？？
bool 是C++中的关键字，C中不支持
所以C99标准中引...