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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...xcel中异步自定义函数，异步的UDF函数能够极大地提高Excel插件的用户体验，能够提高系统的可扩展性和稳定性。
本文所有的代码点击此处下载，希望本文对您了解Excel中的RTD函数有所帮助。
来源：http://www.cnblogs.com/yangecnu/p/Excel...
PHP - iterate on string characters
Is there a nice way to iterate on the characters of a string? I'd like to be able to do foreach , array_map , array_walk , array_filter etc. on the characters of a string.
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What is the argument for printf that formats a long?
... Yep Dr Beco; further, just %l triggers warning: unknown conversion type character 0x20 in format [-Wformat]
– Patrizio Bertoni
Jul 29 '15 at 10:53
add a comment
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“:” (colon) in C struct - what does it mean? [duplicate]
... struct
{
short a : 4;
short b : 3;
} test2;
struct
{
char a : 4;
char b : 3;
} test3;
struct
{
char a : 4;
short b : 3;
} test4;
printf("test1: %d\ntest2: %d\ntest3: %d\ntest4: %d\n", sizeof(test1), sizeof(test2), sizeof(test3), sizeof(test4));
test...
SQL Server: converting UniqueIdentifier to string in a case statement
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I think I found the answer:
convert(nvarchar(50), RequestID)
Here's the link where I found this info:
http://msdn.microsoft.com/en-us/library/ms187928.aspx
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How to know the size of the string in bytes?
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You can use encoding like ASCII to get a character per byte by using the System.Text.Encoding class.
or try this
System.Text.ASCIIEncoding.Unicode.GetByteCount(string);
System.Text.ASCIIEncoding.ASCII.GetByteCount(string);
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What is a segmentation fault?
...hen you try to write to a portion of memory that was marked as read-only:
char *str = "Foo"; // Compiler marks the constant string as read-only
*str = 'b'; // Which means this is illegal and results in a segfault
Dangling pointer points to a thing that does not exist any more, like here:
char *p...
了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
... <stdio.h>
int main()
{
struct stat s1;
int status = stat(<const char* denoting pathname>, &s1);
printf(“Path is a directory : %d\n”, S_ISDIR(s1.st_mode));
return 0;
}
对于 I/O 操作较多的程序，这样的不一致就意味着需要进行大量的工程工作才能...
Algorithm to return all combinations of k elements from n
... takes an array of letters as an argument and a number of those letters to select.
71 Answers
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How do I trim whitespace from a string?
... Hello ")
' Hello'
Also, note that str.strip() removes other whitespace characters as well (e.g. tabs and newlines). To remove only spaces, you can specify the character to remove as an argument to strip, i.e.:
>>> " Hello\n".strip(" ")
'Hello\n'
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