大约有 40,000 项符合查询结果（耗时：0.0678秒） [XML]
How to run Rake tasks from within Rake tasks?
...
@kch, can you string these together (like on the commandline rake db:reset db:migrate for example). Can you do something like: Rake::Task["db:reset", "db:migrate"].invoke
– Jeff
Mar 25 '15 at 15:51
...
fastest (low latency) method for Inter Process Communication between Java and C/C++
... The following code takes exactly 0.1 microsecond, while doing a primitive string concatenation only:
int j=123456789;
String ret = "my-record-key-" + j + "-in-db";
P.P.P.S - hope this is not too much off-topic, but finally I tried replacing Thread.sleep(0) with incrementing a static volatile in...
Group by with multiple columns using lambda
...private class CustomerGroupingKey
{
public CustomerGroupingKey(string country, string gender)
{
Country = country;
Gender = gender;
}
public string Country { get; }
public string Gender { get; }
}
...
Reading settings from app.config or web.config in .NET
...oject if there isn't one already. You can then access the values like so:
string configvalue1 = ConfigurationManager.AppSettings["countoffiles"];
string configvalue2 = ConfigurationManager.AppSettings["logfilelocation"];
s...
Is it .yaml or .yml?
...ruling as you can get, but the habit of 8.3 is hard to get out of (and, appallingly, still occasionally relevant in 2013).
share
|
improve this answer
|
follow
...
TransactionScope automatically escalating to MSDTC on some machines?
... transaction, even if both connections
were using identical connection
strings. In this case, a distributed
transaction adds unnecessary overhead
that decreases performance.
Starting with SQL Server 2008 and
version 3.5 of the .NET Framework,
local transactions are no longer
promo...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...include <msgpack.hpp>
class myclass {
private:
std::string str;
std::vector<int> vec;
public:
// This macro enables this class to be serialized/deserialized
MSGPACK_DEFINE(str, vec);
};
int main(void) {
// serialize
my...
Correct format specifier for double in printf
... specifier (among others).
Note that this is one place that printf format strings differ substantially from scanf (and fscanf, etc.) format strings. For output, you're passing a value, which will be promoted from float to double when passed as a variadic parameter. For input you're passing a pointe...
How do I enable C++11 in gcc?
...OSX Mountain Lion. I am trying to compile a C++ program which uses the to_string function in <string> . I need to use the flag -std=c++11 every time:
...
Find and replace with sed in directory and sub directories
... he wants to find all files in sub directories contain that string and replace, not only a single file
– phuclv
Jun 9 '17 at 9:58
add a comment
...