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Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...e - which are typically implemented internally using b-trees (allowing for selecting, sorting or ranges starting from left most column) or hash tables (allowing for selection starting from left most column).
Where the other index types are general-purpose, a FULLTEXT index is specialised, in that it...
Using 'starts with' selector on individual class names
...thought of using space in there. Can one use boolean operators in a jquery selector? Ideally, the above would be 'OR' to avoid the (rare and likely avoidable) case where there are more than one class staring with 'apple-'
– DA.
Feb 1 '10 at 17:12
...
The tilde operator in C
... operator. It inverts the bits of the operand.
For example, if you have:
char b = 0xF0; /* Bits are 11110000 */
char c = ~b; /* Bits are 00001111 */
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内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
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清单 1. 简单的潜在堆内存丢失和缓冲区覆盖
void f1(char *explanation)
{
char p1;
p1 = malloc(100);
(void) sprintf(p1,
"The f1 error occurred because of '%s'.",
explanation);
loca...
SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...leOperation用法总结：
//删除文件或者文件夹
bool DeleteFile(char * lpszPath)
{
SHFILEOPSTRUCT FileOp={0};
FileOp.fFlags = FOF_ALLOWUNDO | //允许放回回收站
FOF_NOCONFIRMATION; //不出现确认对话框
FileOp.pFrom = lpszPath;
FileOp.pTo = NULL; //一定要是NULL
FileOp...
Is it possible to declare two variables of different types in a for loop?
...ound (not that i'd actually use it unless forced to):
for(struct { int a; char b; } s = { 0, 'a' } ; s.a < 5 ; ++s.a)
{
std::cout << s.a << " " << s.b << std::endl;
}
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Stripping out non-numeric characters in string
Hey Im looking to strip out non-numeric characters in a string in ASP.NET C#
11 Answers
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Android Replace “…” with ellipsis character
...Eclipse then you can always do the following:
Right click on the warning
Select "Quick Fix" (shortcut is Ctrl + 1 by default)
Select "Replace with suggested characters"
This should replace your three dots with the proper Unicode character for ellipsis.
Just a note: The latest version of ADT (21...
C# Equivalent of SQL Server DataTypes
...te[]
image None None
varchar None None
char None None
nvarchar(1), nchar(1) SqlChars, SqlString Char, String, Char[]
nvarchar ...
Why are Oracle table/column/index names limited to 30 characters?
...ine of code that goes something like
l_table_name VARCHAR2(30);
BEGIN
SELECT table_name
INTO l_table_name
FROM dba_tables
WHERE ...
to suddenly break because the DBA 15 years ago used VARCHAR2(30) rather than DBA_TABLES.TABLE_NAME%TYPE in the script would cause massive revolt. I w...