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What's the cleanest way of applying map() to a dictionary in Swift?
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No need for temp var and reduce is now a method in Swift 2.0: let newDict = oldDict.reduce([String:Int]()) { (var dict, pair) in dict["new\(pair.1)"] = pair.1; return dict }
– Zmey
Jul 23 '15 at 15:48
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git command to move a folder inside another
... don't see old git history in my project. At least my project is not lost. Now I have my project in newFolderName, but without the history (
Just want to warn, be carefull using advice of "Andres Jaan Tack", if you dont want to lose your git hsitory.
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Does using “new” on a struct allocate it on the heap or stack?
...ocation.
Thirdly, I'm ignoring generics, mostly because I don't actually know the answer, and partly because it would complicate things too much.
Finally, all of this is just with the current implementation. The C# spec doesn't specify much of this - it's effectively an implementation detail. Ther...
How do you install Boost on MacOS?
How do you install Boost on MacOS?
Right now I can't find bjam for the Mac.
10 Answers
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Optional query string parameters in ASP.NET Web API
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This issue has been fixed in the regular release of MVC4.
Now you can do:
public string GetFindBooks(string author="", string title="", string isbn="", string somethingelse="", DateTime? date= null)
{
// ...
}
and everything will work out of the box.
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Do I set properties to nil in dealloc when using ARC?
I am trying to learn Automatic Reference Counting in iOS 5. Now the first part of this question should be easy:
2 Answers
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Getting distance between two points based on latitude/longitude
...("Result:", distance)
print("Should be:", 278.546, "km")
The distance is now returning the correct value of 278.545589351 km.
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Cartesian product of x and y array points into single array of 2D points
... following sections, I include some tests of other alternatives. These are now somewhat out of date, but rather than duplicate effort, I've decided to leave them here out of historical interest. For up-to-date tests, see Panzer's answer, as well as Nico Schlömer's.
Tests against alternatives
Here...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...ee possibilities can occur where you won't get a unique ID (please let me know if there are more):
Before this discussion, recall that the BSON Object ID consists of:
[4 bytes seconds since epoch, 3 bytes machine hash, 2 bytes process ID, 3 bytes counter]
Here are the three possibilities, so you ...
How can I create a unique constraint on my column (SQL Server 2008 R2)?
... PK__Customer__3213E83FCC4A1DFA (n/a) (n/a) (n/a) (n/a) id
---- now adding the unique constraint
ALTER TABLE Customer ADD CONSTRAINT U_Name UNIQUE(Name)
-- Commands completed successfully.
sp_help Customer
---> index
---index_name index_description index_keys
---PK__Customer__3...