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How to detect if a function is called as constructor?
...ert(isConstructor);
}
Obviously this is not ideal, since you now have an extra useless property on every object constructed by x that could be overwritten, but I think it's the best you can do.
(*) "instance of" is an inaccurate term but is close enough, and more concise than "object that has bee...
What are some (concrete) use-cases for metaclasses?
...Model):
... foo = Integer()
...
>>> class B(A):
... bar = String()
...
>>> B._fields
{'foo': Integer('A.foo'), 'bar': String('B.bar')}
Again, this can be done (without inheritance) with a class decorator:
def model(cls):
fields = {}
for key, value in vars(cls).it...
Alternatives to gprof [closed]
...of scalar values. As soon as you, for example, change it into a sort using string-compare, it is still a bottleneck, but program counter sampling will not see it because now the hotspot is in string-compare. On the other hand if it were to sample the extended program counter (the call stack), the po...
Is there a better way to do optional function parameters in JavaScript? [duplicate]
...
+1, but typeof returns a string, so you need to put quotes around undefined for this to work: if(typeof myVariable == "undefined")...
– Richard Inglis
Jun 4 '12 at 15:10
...
Python memoising/deferred lookup property decorator
... Tip: Put a @wraps(fn) below @property to not loose your doc strings etc. (wraps comes from functools)
– letmaik
May 29 '14 at 10:12
|
...
How do I rename a project in Xcode 5?
...t will include the info.plist and various files, but also all the relevant strings from nib/xib files like MainMenu menus.
Accept the changes and you will get the prompt to save a snapshot of the project.
Always make a snapshot when Xcode asks, it will be useful to restore if something does not wor...
Class does not implement its superclass's required members
... init, like so:
convenience required init(coder: NSCoder) {
self.init(stringParam: "", intParam: 5)
}
Note the call to an initializer in self. This allows you to only have to use dummy values for the parameters, as opposed to all non-optional properties, while avoiding throwing a fatal error....
Storing money in a decimal column - what precision and scale?
...es are stored using an integer for the smallest unit.
class Currency {
String code; // eg "USD"
int value; // eg 2500
boolean converted;
}
class Price {
Currency grossValue;
Currency netValue;
Tax taxRate;
}
In the database, the values are stored as a string in ...
How to convert java.util.Date to java.sql.Date?
... database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes. Hibernate 5 & JPA 2.2 support java.time.
Where to obtain the java.time classes?
Java SE 8, Java SE 9, Java SE 10, Java SE 11, and later - Part of the standard Java API with a bun...
Should MySQL have its timezone set to UTC?
...MySQL datetime fields and daylight savings time -- how do I reference the "extra" hour?
Converting negative values from FROM_UNIXTIME
Sources:
https://bugs.mysql.com/bug.php?id=68861
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html
http://dev.mysql.com/doc/refman/5.1/en/dateti...