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How to enumerate an enum with String type?
...ase diamonds = "♦"; case clubs = "♣" }
Then the following code will print all possible values:
Suit.allCases.forEach {
print($0.rawValue)
}
Compatibility with earlier Swift versions (3.x and 4.x)
If you need to support Swift 3.x or 4.0, you may mimic the Swift 4.2 implementation by adding...
How to remove from a map while iterating it?
...nalogy, it has always been perfectly legitimate to delete p where p is a pointer-to-constant. Constness does not constrain lifetime; const values in C++ can still stop existing.
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How to use SharedPreferences in Android to store, fetch and edit values [closed]
...nces gives me the following error: The method getSharedPreferences(String, int) is undefined for the type MyActivity
– Si8
Jul 29 '13 at 19:14
17
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How do I find which program is using port 80 in Windows? [duplicate]
... = $g[2].Value } -PassThru |
Add-Member @{ LocalPort = [int]$g[3].Value } -PassThru |
Add-Member @{ RemoteAddress = $g[4].Value } -PassThru |
Add-Member @{ RemotePort = $g[5].Value } -PassThru |
Add-Member @{ State = $g[6].Value...
Selecting with complex criteria from pandas.DataFrame
...tup:
>>> import pandas as pd
>>> from random import randint
>>> df = pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
'C': [randint(1, 9)*100 for x in range(10)]})
>>> df
A...
Compare a string using sh shell
.../test and the builtins for dash and bash. In ksh and zsh, the strings are converted to numerical values and are equal since they are both 0. IMO, the behavior of the builtins for ksh and zsh is incorrect, but the spec for test is ambiguous on this.
...
How to determine if binary tree is balanced?
... abs(Height(tree.left) - Height(tree.right)) <= 1)
Translating that into the programming language of your choice should be trivial.
Bonus exercise: this naive code sketch traverses the tree far too many times when computing the heights. Can you make it more efficient?
Super bonus exercise: ...
Programmer Puzzle: Encoding a chess board state throughout a game
...ves”. The problem also says nothing about knowing the moves up to this point. That’s actually a problem as I’ll explain.
Castling
The game has proceeded as follows:
e4 e5
Nf3 Nc6
Bb5 a6
Ba4 Bc5
The board looks as follows:
White has the option of castling. Part of the requirements f...
Task not serializable: java.io.NotSerializableException when calling function outside closure only o
...
RDDs extend the Serialisable interface, so this is not what's causing your task to fail. Now this doesn't mean that you can serialise an RDD with Spark and avoid NotSerializableException
Spark is a distributed computing engine and its main abstraction i...
Difference between shadowing and overriding in C#?
...
Well inheritance...
suppose you have this classes:
class A {
public int Foo(){ return 5;}
public virtual int Bar(){return 5;}
}
class B : A{
public new int Foo() { return 1;} //shadow
public override int Bar() {return 1;} //override
}
then when you call this:
A clA = new A();
...