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Is there common street addresses database design for all addresses of the world? [closed]
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Try upu.int/post_code/en/… and choose the appropriate country in the drop-down
– barrowc
May 31 '09 at 3:30
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How to disable a particular checkstyle rule for a particular line of code?
...ect obj) { ... } // No violation events will be reported
@Override
public int hashCode() { ... } // No violation events will be reported
//END GENERATED CODE
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Differences between Line and Branch coverage
... branches as conditionals.
Why do you care? Consider the example:
public int getNameLength(boolean isCoolUser) {
User user = null;
if (isCoolUser) {
user = new John();
}
return user.getName().length();
}
If you call this method with isCoolUser set to true, you get 100% ...
Renaming columns in pandas
...bbreviated representation:code <class 'pandas.core.frame.DataFrame'> Int64Index: 1000 entries, 0 to 999 Data columns: BodyMarkdown 1000 non-null code works, but when i do dataframe.head() the old names for the columns re-appear.
– darKoram
Sep 10 ...
How do you perform a CROSS JOIN with LINQ to SQL?
...s:
var names = new string[] { "Ana", "Raz", "John" };
var numbers = new int[] { 1, 2, 3 };
var newList=names.SelectMany(
x => numbers,
(y, z) => { return y + z + " test "; });
foreach (var item in newList)
{
Console.WriteLine(item);
}
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Difference between Key, Primary Key, Unique Key and Index in MySQL
...uplicate values result in an error.
A PRIMARY KEY is both a unique constraint and it also implies that the column is NOT NULL. It is used to give an identity to each row. This can be useful for joining with another table via a foreign key constraint. While it is not required for a table to have a P...
What is the use of ObservableCollection in .net?
...works essentially like a regular collection except that it implements
the interfaces:
INotifyCollectionChanged,
INotifyPropertyChanged
As such it is very useful when you want to know when the collection has changed. An event is triggered that will tell the user what entries have been added/re...
How can I remove a specific item from an array?
... Serious question: why doesn't JavaScript allow the simple and intuitive method of removing an element at an index? A simple, elegant, myArray.remove(index); seems to be the best solution and is implemented in many other languages (a lot of them older than JavaScript.)
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Unnecessary curly braces in C++?
...automatic) variables.
In C++ this is maybe not so important since you can introduce new variables anywhere, but perhaps the habit is from C, where you could not do this until C99. :)
Since C++ has destructors, it can also be handy to have resources (files, mutexes, whatever) automatically released...
JavaScript check if variable exists (is defined/initialized)
...zed is better/correct?
(Assuming the variable could hold anything (string, int, object, function, etc.))
28 Answers
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