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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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Undefined symbols for architecture armv7
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I didn't know which file was missing, so I showed the Build Phases in the assistant editor (the second editing view). I opened the offending file in the left editing view and checked that each of the imported files existed in Build Pha...
Unable to create a constant value of type Only primitive types or enumeration types are supported in
...ere can I find documentation about things like this? I’m really lacking knowledge of EF’s limits, and when I try to restrict a query’s result set like this, this incompetence makes itself very apparent and slows me down.
– Nomenator
Apr 5 '17 at 21:31
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Is there any difference between GROUP BY and DISTINCT
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For example, if you have a bunch of purchase records, and you want to know how much was spent by each department, you might do something like:
SELECT department, SUM(amount) FROM purchases GROUP BY department
This will give you one row per department, containing the department name and the su...
Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
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Note: I noticed this question a while ago, but I'm only posting my answer now because the NDA has been lifted
Why does it not appear for AutoLayout?
As you may have noticed, iOS 7 brings about a whole new look. The look of UI elements have changed, but also so have some of their sizes (or metrics...
What difference is there between WebClient and HTTPWebRequest classes in .NET?
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Anyone coming across this like I have just now, note there is a new player on the field called HttpClient that comes with .NET 4.5 that may (or may not?) solve some of the above hassles...
– Funka
Jan 31 '13 at 20:14
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GDB corrupted stack frame - How to debug?
...adresses (0x00000002 and the like) are actually PC values, not SP values. Now, when you get this kind of SEGV, with a bogus (very small) PC address, 99% of the time it's due to calling through a bogus function pointer. Note that virtual calls in C++ are implemented via function pointers, so any pr...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
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# Turn group2 into a factor
iris$group2 = factor(iris$group2)
# Now all possible combinations of Species and group2 are included in the output,
# whether present in the data or not
iris %>% group_by(Species, group2, .drop=FALSE) %>% tally
#> Species group2 n
#> ...
How do I make a checkbox required on an ASP.NET form?
...ert it to C# if that is your pleasure. The company I am working for right now requires VB :(
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What is the difference between decodeURIComponent and decodeURI?
...ncoded also because they are regarded as text and not special characters.
Now back to the difference between the decode functions, each function decodes strings generated by its corresponding encode counterpart taking care of the semantics of the special characters and their handling.
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