大约有 19,300 项符合查询结果（耗时：0.0559秒） [XML]
Anonymous recursive PHP functions
...
Mind Blown! Thanks a lot! How did I not know about this till now? The amount of application I have for recursive anonymous functions is huge. Now I can finally loop through nested structures in layouts without having to explicitly define a method and keep ...
What does it mean for a data structure to be “intrusive”?
...g the necessary information for the container. That means that on the one side the data type needs to be specialized depending on how it will be stored, on the other side it means that the data "knows" how it is stored and thus can be optimized slightly better.
Non-intrusive:
template<typename ...
Can an enum class be converted to the underlying type?
...t;>(e);
}
} // namespace util
enum SomeEnum : uint16_t { A, B };
void write(SomeEnum /*e*/) {
std::cout << "SomeEnum!\n";
}
void write(uint16_t /*v*/) {
std::cout << "uint16_t!\n";
}
int main(int argc, char* argv[]) {
SomeEnum e = B;
write(util::underlying_cast(...
Convert Go map to json
...main.Foo
The thing is you cannot use integers as keys in JSON; it is forbidden. Instead, you can convert these values to strings beforehand, for instance using strconv.Itoa.
See this post for more details: https://stackoverflow.com/a/24284721/2679935
...
Could you explain STA and MTA?
...ives notifications of calls to process by receiving a window message to a hidden window; when it makes an outbound call, it starts a modal message loop to prevent other window messages being processed. You can specify a message filter to be called, so that your application can respond to other messa...
How to copy a local Git branch to a remote repo
...g. refs/heads/experimental) in origin repository with it.
If experimental did not exist remotely, it would be created.
This is the same as:
git push origin experimental:refs/heads/experimental
Create the branch experimental in the origin repository by copying the current experimental branch.
This f...
Linux bash: Multiple variable assignment
...I was using this technique to return multiple values from a script that I did care about the return status. I thought I would share my findings.
– Lee Netherton
Oct 22 '15 at 11:26
...
Where to define custom error types in Ruby and/or Rails?
... GemName
class AuthenticationError < StandardError; end
class InvalidUsername < AuthenticationError; end
end
an example of this would be something like this in httparty
For Ruby on Rails
Put them in your lib/ folder under a file called exceptions.rb, which would look something like t...
See what process is using a file in Mac OS X
...gh the running apps) but Activity Monitor does show it to be running. Stupid Preview.
– Dave Sag
Aug 15 '12 at 1:27
T...
Convert data.frame column format from character to factor
...rs] <- lapply(dat[, character_vars], as.factor)
This creates a vector identifying which columns are of class character, then applies as.factor to those columns.
Sample data:
dat <- data.frame(var1 = c("a", "b"),
var2 = c("hi", "low"),
var3 = c(0, 0.1),
...