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What is meant by Scala's path-dependent types?
...Int, height: Int) {
case class Coordinate(x: Int, y: Int) {
require(0 <= x && x < length && 0 <= y && y < height)
}
val occupied = scala.collection.mutable.Set[Coordinate]()
}
val b1 = Board(20, 20)
val b2 = Board(30, 30)
val c1 = b1.Coordinate(15, 15...
Applying function with multiple arguments to create a new pandas column
...n:
>>> import numpy as np
>>> df = pd.DataFrame({"A": [10,20,30], "B": [20, 30, 10]})
>>> df['new_column'] = np.multiply(df['A'], df['B'])
>>> df
A B new_column
0 10 20 200
1 20 30 600
2 30 10 300
or vectorize arbitrary func...
What's the difference between HEAD^ and HEAD~ in Git?
...it rev-parse documentation defines it as
<rev>^, e.g. HEAD^, v1.5.1^0
A suffix ^ to a revision parameter means the first parent of that commit object. ^<n> means the nth parent ([e.g.] <rev>^ is equivalent to <rev>^1). As a special rule, <rev>^0 means the commit itself...
How to build an android library with Android Studio and gradle?
... }
dependencies {
classpath 'com.android.tools.build:gradle:0.3'
}
}
Now we need to tell Gradle about some of the Android parts. It's pretty simple. A basic one (that works in most of my cases) looks like the following. I have a comment in this block, it will allow me to specify...
python's re: return True if string contains regex pattern
...
mattbornskimattbornski
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Error “initializer element is not constant” when trying to initialize variable with const
... C language, the term "constant" refers to literal constants (like 1, 'a', 0xFF and so on), enum members, and results of such operators as sizeof. Const-qualified objects (of any type) are not constants in C language terminology. They cannot be used in initializers of objects with static storage dur...
Git: Cannot see new remote branch
... |
edited Oct 6 '12 at 20:57
answered Oct 6 '12 at 19:08
...
Print commit message of a given commit in git
... |
edited Jul 28 '10 at 20:53
answered Jul 28 '10 at 20:47
...
How do I get the localhost name in PowerShell?
... I get the localhost (machine) name in PowerShell? I am using PowerShell 1.0.
7 Answers
...
Getting exact error type in from DbValidationException
...iest way I've found to get instant insight into these errors.
For Visual 2012+ users who care only about the first error and might not have a catch block, you can even do:
((System.Data.Entity.Validation.DbEntityValidationException)$exception).EntityValidationErrors.First().ValidationErrors.First(...