大约有 40,000 项符合查询结果（耗时：0.0528秒） [XML]
How to initialize all the elements of an array to any specific value in java
...
[Incidentally, memset in C or C++ is only of any real use for arrays of char.]
share
|
improve this answer
|
follow
|
...
Echo a blank (empty) line to the console from a Windows batch file [duplicate]
... @MatteoItalia, It's nothing to do with speed. If it's doing something extra (search first for a file named echo without extension) then it's wrong and if there's a file as such, it'll indeed fail. Extra points if the batchjob fails on a weekend while everyone is partying hard half-a-country awa...
Python: most idiomatic way to convert None to empty string?
... want your function to behave like the str() built-in, but return an empty string when the argument is None, do this:
def xstr(s):
if s is None:
return ''
return str(s)
share
|
imp...
What is a good pattern for using a Global Mutex in C#?
...g System.Security.Principal; //SecurityIdentifier
static void Main(string[] args)
{
// get application GUID as defined in AssemblyInfo.cs
string appGuid =
((GuidAttribute)Assembly.GetExecutingAssembly().
GetCustomAttributes(typeof(GuidAttribute), false).
...
Non-Relational Database Design [closed]
...DBs are a massive win, and the drawbacks of less flexible queries and some extra code for data validation seems a small price to pay.
Have you hit your head against anything that seems impossible?
Not yet. Map/reduce as a means of querying a database is unfamiliar, and requires a lot more thinking...
“The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine” Error in importing
...owngraded the file to XLS and it worked for me without installing anything extra.
– Mark Boltuc
Nov 5 '14 at 13:44
8
...
Python string.join(list) on object array rather than string array
...
The built-in string constructor will automatically call obj.__str__:
''.join(map(str,list))
share
|
improve this answer
|
...
Thread pooling in C++11
... func();
}
}
main.cpp
#include "function_pool.h"
#include <string>
#include <iostream>
#include <mutex>
#include <functional>
#include <thread>
#include <vector>
Function_pool func_pool;
class quit_worker_exception : public std::exception {};
void ...
What do all of Scala's symbolic operators mean?
...nds
<? <! // Start token for various XML elements
" """ // Strings
' // Indicate symbols and characters
@ // Annotations and variable binding on pattern matching
` // Denote constant or enable arbitrary identifiers
, // Parameter separator
; ...
MySQL query String contains
... to figure out how I can make a query with MySQL that checks if the value (string $haystack ) in a certain column contains certain data (string $needle ), like this:
...