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HashMap with multiple values under the same key
...ike ArrayListMultimap yourself... or just use a HashMap<String, List<Integer>> or whatever. You'd need to create an empty list any time a value is added for the first time, basically.
– Jon Skeet
Feb 10 '11 at 18:20
...
C-like structures in Python
...or your basic example, but also covers a bunch of edge cases you might run into later as well. Your fragment above would be written as:
from collections import namedtuple
MyStruct = namedtuple("MyStruct", "field1 field2 field3")
The newly created type can be used like this:
m = MyStruct("foo", "...
What is the best way to iterate over a dictionary?
...r item in myDictionary.Keys)
{
foo(item);
}
And lastly, if you're only interested in the values:
foreach(var item in myDictionary.Values)
{
foo(item);
}
(Take note that the var keyword is an optional C# 3.0 and above feature, you could also use the exact type of your keys/values here)
...
Composite Key with EF 4.1 Code First
...rder:
public class ActivityType
{
[Key, Column(Order = 0)]
public int ActivityID { get; set; }
[Key, Column(Order = 1)]
[Required(ErrorMessage = "A ActivityName is required")]
[StringLength(50, ErrorMessage = "Activity Name must not exceed 50 characters")]
public string Act...
When is each sorting algorithm used? [closed]
...gorithm is preferred over others - merge sort vs QuickSort vs heapsort vs 'intro sort', etc?
5 Answers
...
Where are static methods and static variables stored in Java?
...p (young/old generation or survivor space). Those objects (unless they are internal objects like classes etc.) are not stored in PermGen space.
Example:
static int i = 1; //the value 1 is stored in the PermGen section
static Object o = new SomeObject(); //the reference(pointer/memory address) is s...
Declare a const array
...ith a constant value. The only working example that comes to mind is const int[] a = null; which is not very useful, but indeed an instance of an array constant.
– waldrumpus
Jul 31 '19 at 7:56
...
TSQL - How to use GO inside of a BEGIN .. END block?
...roduction. Basically, it takes a bunch of change-scripts, and merges them into a single script, wrapping each script in a IF whatever BEGIN ... END statement.
...
Correct approach to global logging in Golang
... can be used concurrently from multiple goroutines.
Pass around a pointer to that log.Logger?
log.New returns a *Logger which is usually an indication that you should pass the object around as a pointer. Passing it as value would create a copy of the struct (i.e. a copy of the Logger) an...
Remove columns from DataTable in C#
...Columns are 0 based), until the Column count is 10 or less.
DataTable dt;
int desiredSize = 10;
while (dt.Columns.Count > desiredSize)
{
dt.Columns.RemoveAt(desiredSize);
}
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