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JavaScript pattern for multiple constructors
... this.foobar = foobar;
}
Foobar.prototype = {
foobar: null
};
Foobar.fromComponents = function(foo, bar) {
var foobar = foo + bar;
return new this(foobar);
};
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django - query filter on manytomany is empty
...ard answer, other possible solution can be achieved using the Q() object.
from django.db.models import Q
filters = Q(manytomany=None)
TestModel.objects.filter(filters)
Negation:
filters = ~Q(manytomany=None)
TestModel.objects.filter(filters)
...
Replace all 0 values to NA
... without the [<- function:
A sample data frame dat (shamelessly copied from @Chase's answer):
dat
x y
1 0 2
2 1 2
3 1 1
4 2 1
5 0 0
Zeroes can be replaced with NA by the is.na<- function:
is.na(dat) <- !dat
dat
x y
1 NA 2
2 1 2
3 1 1
4 2 1
5 NA NA
...
Haskell export current module with additional imported module
...
There is a simple solution, just export the module from the module:
module Test
( module Test
, module A
) where
import Prelude()
import A
f x = x
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impr...
How to disable Golang unused import error
... which would normally be an awful idea but is really useful for saving you from having to jump around the file to get to the import statement and back when you're just trying to compile or test some code file that you are iteratively fleshing out.
– mtraceur
No...
Replacements for switch statement in Python?
...bda x: x * 5,
'b': lambda x: x + 7,
'c': lambda x: x - 2
}[value](x)
From here
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How to install python3 version of package via pip on Ubuntu?
...
This will work on all Ubuntu versions starting from 12.04
– Billal Begueradj
May 9 '17 at 8:40
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WebService Client Generation Error with JDK8
...
I use wsdl2java.bat from Apache CXF. So I just inserted the JVM option into this BAT-file. It works.
– ka3ak
Mar 11 '15 at 9:59
...
How to insert values into C# Dictionary on instantiation?
...
You can also use Lambda expressions to insert any Key Value pairs from any other IEnumerable object. Key and value can be any type you want.
Dictionary<int, string> newDictionary =
SomeList.ToDictionary(k => k.ID, v => v.Name);
I find that much simpler since...
Calling constructors in c++ without new
...gnment();
prove_copy_constructor_is_called();
return 0;
}
Output from gcc 4.4:
TEST: direct
char constructor: direct
destructor
TEST: assignment
char constructor: assignment
destructor
TEST: prove_copy_constructor_is_called
char constructor: prove_copy_constructor_is_called
Copy constru...