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Javascript Reduce an empty array
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The second parameter is for initial value.
[].reduce(function(previousValue, currentValue){
return Number(previousValue) + Number(currentValue);
}, 0);
or using ES6:
[].reduce( (previousValue, currentValue) => previousValue + currentValue, ...
How do I enable language extensions from within GHCi?
... Note that after typing :set -X in GHCi you'll actually get tab completion for available extensions, which is handy when you can't remember where they decided to use abbreviations ("MultiParam") or acronyms ("GADT") rather than spelling things out in full ("MonomorphismRestriction")...
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Google Maps API v2: How to make markers clickable?
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Is there a way to listen for clicks on the popup window? The one that displays your title/snippet?
– user901309
Jan 9 '13 at 19:46
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Entity Framework Code First - two Foreign Keys from same table
... .WithMany(t => t.HomeMatches)
.HasForeignKey(m => m.HomeTeamId)
.WillCascadeOnDelete(false);
modelBuilder.Entity<Match>()
.HasRequired(m => m.GuestTeam)
.WithMany(t => t.AwayM...
cancelling queued performSelector:afterDelay calls
...or whatever mechanism it is that is utilized by the API) when you call performSelector:withObject:afterDelay ?
4 Answers
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Is there a literal notation for an array of symbols?
I like this literal expression for an array of strings:
2 Answers
2
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Why does the Scala compiler disallow overloaded methods with default arguments?
...from here):
The reason is that we wanted a deterministic naming-scheme for the
generated methods which return default arguments. If you write
def f(a: Int = 1)
the compiler generates
def f$default$1 = 1
If you have two overloads with defaults on the same parameter
positio...
Debugging Package Manager Console Update-Database Seed Method
...dn't miss the breakpoint by not attaching in time I added a Thread.Sleep before the breakpoint.
I hope this helps someone.
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Turning a string into a Uri in Android
... String: an RFC 2396-compliant, encoded URI
Url must be canonicalized before using, like this:
Uri.parse(Uri.decode(STRING));
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MongoDB: Find a document by non-existence of a field?
...t -- thanks. I know this caveat holds true in MongoDB version 1.8.x and before; but I thought queries with $exists field constraints can now make use of indexes in version 2.0 ...?
– dampier
Dec 20 '11 at 1:57
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