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Is JavaScript's “new” keyword considered harmful?
... to every object I create, I could just write a creation function that manually assigns each method to each new object... Or, I could assign them to the creation function's prototype and use new to stamp out new objects. Not only is this faster (no code needed for each and every method on the protot...
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
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What if I have a separate called Counts and instead of count the rows of the grouped type, I need to add along the column Counts.
– Abhishek Bhatia
Oct 2 '17 at 21:28
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get path for my .exe [duplicate]
... That's not really correct answer. It will give you a string like "file://foo"
– dyatchenko
Dec 4 '15 at 23:43
Also i...
Google Guava isNullOrEmpty for collections
...eyard."
We don't believe that "is null or empty" is a question you ever really want to be asking about a collection.
If a collection might be null, and null should be treated the same as empty, then get all that ambiguity out of the way up front, like this:
Set<Foo> foos = NaughtyClass.getF...
ImportError: No module named MySQLdb
...ql+mysqldb.
engine = create_engine('mysql+mysqldb://scott:tiger@localhost/foo')
I got the "No module named MySQLdb" error when the above command was executed. To fix it I installed the mysql-python module and the issue was fixed.
sudo pip install mysql-python
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Can't use Swift classes inside Objective-C
... -Swift.h file, only the bridging headers. So I created it, but it's actually empty.
I can use all my ObjC classes in Swift, but I can't do it vice versa. I marked my swift class with @objc but it didn't help. What can I do now?
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Can we omit parentheses when creating an object using the “new” operator?
...cial case, for the new operator only, JavaScript simplifies the grammar by allowing the parenthesis to be omitted if there are no arguments in the function call. Here are some examples using the new operator:
o = new Object; // Optional parenthesis omitted here
d = new Date();
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Personally, ...
Remove empty array elements
... of strings, you can simply use array_filter(), which conveniently handles all this for you:
print_r(array_filter($linksArray));
Keep in mind that if no callback is supplied, all entries of array equal to FALSE (see converting to boolean) will be removed. So if you need to preserve elements that ...
How to create a generic array in Java?
...tly what type of objects it contains (i.e. its constructor was explicitly called with a Class<E> argument, and methods will throw an exception when they are passed arguments that are not of type E. See Collections.checkedCollection.
-> in that case, you should write:
public class GenSet&l...
What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
...tional arguments and initialize them to defaults if not provided: function foo(arg1, optarg1, optarg2) { optarg1 = optarg1 || 'default value 1'; optarg2 = optart2 || 'defalt value 2';}
– crazy2be
Jun 22 '11 at 19:24
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