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How to dynamic new Anonymous Class?
...n: just cast it to IDictionary<string, object>. Then you can use the indexer.
You use the same casting technique to iterate over the fields:
dynamic employee = new ExpandoObject();
employee.Name = "John Smith";
employee.Age = 33;
foreach (var property in (IDictionary<string, object>)e...
Efficient way to apply multiple filters to pandas DataFrame or Series
...
Pandas (and numpy) allow for boolean indexing, which will be much more efficient:
In [11]: df.loc[df['col1'] >= 1, 'col1']
Out[11]:
1 1
2 2
Name: col1
In [12]: df[df['col1'] >= 1]
Out[12]:
col1 col2
1 1 11
2 2 12
In [13]: df[(d...
How to know if user is logged in with passport.js?
...ddleware to check for authentication, as in "router.get('/', my_controller.index)", then passport is never consulted and req.user will always be undefined. This is frustrating because I want to allow any visitor to call an API, but tailor the content of the response depending on who is requesting.
...
What is reflection and why is it useful?
...mples to get you started at http://docs.oracle.com/javase/tutorial/reflect/index.html
And finally, yes, the concepts are pretty much similar in other statically typed languages which support reflection (like C#). In dynamically typed languages, the use case described above is less necessary (since ...
Java, Classpath, Classloading => Multiple Versions of the same jar/project
...ate the response accordingly. (docs.oracle.com/cd/E19501-01/819-3659/beadf/index.html)
– Luca Putzu
Jul 19 '16 at 7:42
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How does this milw0rm heap spraying exploit work?
...XSS also.
You can see all the encoding tricks here:
http://www.owasp.org/index.php/Category:OWASP_CAL9000_Project
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How to get the number of characters in a std::string?
...ext) != U_SENTINEL)
{
++codepointCount;
}
// reset the index so we can use the structure again
UTEXT_SETNATIVEINDEX(text, 0);
return codepointCount;
}
void printStringInfo(const std::string& utf8)
{
UErrorCode status = U_ZERO_ERROR;
PUText text(utext_openUTF8...
What do the plus and minus signs mean in Objective-C next to a method?
... code.
@interface NSArray : NSObject {
}
+ (NSArray *)array;
- (id)objectAtIndex:(NSUInteger)index;
@end
// somewhere else:
id myArray = [NSArray array]; // see how the message is sent to NSArray?
id obj = [myArray objectAtIndex:4]; // here the message is sent to myArray
// Btw, in prod...
What's the difference between == and .equals in Scala?
...ml#isNaN(double)
Scala: http://www.scala-lang.org/files/archive/api/2.11.8/index.html#scala.Double@isNaN():Boolean
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Is there any NoSQL data store that is ACID compliant?
...a items in an ACID fashion. This is used as the foundation for maintaining indexes at a higher layer.
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