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Declaration/definition of variables locations in ObjectiveC?
...In ObjC, they should only be used to declare constants, and generally only string constants. For instance:
extern NSString * const MYSomethingHappenedNotification;
You would then in your .m file declare the actual constant:
NSString * const MYSomethingHappenedNotification = @"MYSomethingHappened...
How do I use Django templates without the rest of Django?
...from django.conf import settings
settings.configure(DEBUG=False)
template_string = "Hello {{ name }}"
template = Template(template_string, engine=Engine())
context = Context({"name": "world"})
output = template.render(context) #"hello world"
...
E11000 duplicate key error index in mongodb mongoose
...
var userSchema = new mongoose.Schema({
local: {
name: { type: String },
email : { type: String, require: true, index:true, unique:true,sparse:true},
password: { type: String, require:true },
},
facebook: {
id : { type: String },
token : { type:...
Django templates: verbose version of a choice
...urn value[arg]
except KeyError:
return settings.TEMPLATE_STRING_IF_INVALID
register.filter('human_readable', human_readable)
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Is null reference possible?
...red_ptr<Error>> _instances;
static Error& NewInstance(const string& name, bool isNull = false);
private:
bool _isNull;
Error(const string& name, bool isNull = false) : _name(name), _isNull(isNull) {};
Error() {};
Error(const Error& src) {};
Error& operator=(...
Why hasn't functional programming taken over yet?
... problems we face. Our problems are all about taking in raw information -- strings and metadata -- and transforming them into different strings and metadata. In situations where mutations occur, like someone is typing in the IDE, the problem space inherently lends itself to functional techniques suc...
What does OSGi solve?
...son, there is no special interface required for OSGi services, even a Java String object can act as an OSGi service. This strategy makes application code easier to port to another environment.
Runs Everywhere - Well, that depends. The original goal of Java was to run anywhere. Obviously, it is not p...
iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ntroller.h"
#defineNSLog(format,...)do{\
fprintf(stderr,"%s\n",\
[[[NSStringstringWithUTF8String:__FILE__]lastPathComponent]UTF8String],\
__LINE__,__func__);\
(NSLog)((format),##__VA_ARGS__);\
fprintf(stderr,"-------\n");\
}while(0)
@interfaceViewController
@end
@implementationView...
How to convert a java.util.List to a Scala list
...onverters._ scala> val l = new java.util.ArrayList[java.lang.String] l: java.util.ArrayList[String] = [] scala> l.add("hi") res70: Boolean = true scala> l.add("de") res71: Boolean = true scala> l.asScala res72: scala.collection.mutab...
Default implementation for Object.GetHashCode()
...already been added into a dictionary, reference equality is perfect. With strings, as you note, one is usually more interested in whether a string containing the same sequence of characters has already been added. That's why string overrides GetHashCode. On the other hand, suppose you want to kee...