大约有 45,000 项符合查询结果（耗时：0.0409秒） [XML]
How do you build a Singleton in Dart?
...lthough what's the point of instantiating it twice? Shouldn't it be better if it threw an error when you instantiate it the second time?
– westoque
May 29 '13 at 6:30
61
...
Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error
...
You can get this type of error if your class' .m file is not listed under the "Compile Sources" step of the "Build Phases" tab of your target. Normally Xcode does this for you, but sometimes it loses the plot and you need to add the .m file manually.
To d...
Are there any suggestions for developing a C# coding standards / best practices document? [closed]
...nd it is authored by Juval Lowy
C# Coding Standard
NB: the above link is now dead. To get the .zip file you need to give them your email address (but they won't use it for marketing... honestly) Try here
share
|...
GET URL parameter in PHP
...uld (and should) ensure your code does not trigger notices with:
<?php
if (isset($_GET['link'])) {
echo $_GET['link'];
} else {
// Fallback behaviour goes here
}
Alternatively, if you want to skip manual index checks and maybe add further validations you can use the filter extension:
...
Why can't I use a list as a dict key in python?
...ists Can't Be Dictionary Keys. As explained there:
What would go wrong if you tried to use lists as keys, with the hash as, say, their memory location?
It can be done without really breaking any of the requirements, but it leads to unexpected behavior. Lists are generally treated as if their v...
how to File.listFiles in alphabetical order?
...
Ok, now you justify why it's simpler if you just want to print the results so I will remove my downvote.
– zelanix
Feb 18 '14 at 16:19
...
What is the correct way to start a mongod service on linux / OS X?
... been able to run it, work with it, do simple DB read / write type stuff. Now I'm trying to set up my Mac to run mongod as a service.
...
Class method decorator with self arguments?
...an pass in the attribute name as a string to the decorator and use getattr if you don't want to hardcode the attribute name:
def check_authorization(attribute):
def _check_authorization(f):
def wrapper(self, *args):
print getattr(self, attribute)
return f(self, *...
Is there a simple way to convert C++ enum to string?
...:ostream& operator<<(std::ostream& os, enum Colours c)
{
if (c >= ColoursCount || c < 0) return os << "???";
return os << colours_str[c];
}
int main()
{
std::cout << Red << Blue << Green << Cyan << Yellow << Magenta <...
How to add target=“_blank” to JavaScript window.location?
...unction ToKey(){
var key = document.tokey.key.value.toLowerCase();
if (key == "smk") {
window.open('http://www.smkproduction.eu5.org', '_blank');
} else {
alert("Kodi nuk është valid!");
}
}
...