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Should the hash code of null always be zero, in .NET
...code.
Returning 0 or -1 for null, so long as you choose one and return it all the time, will work. Obviously, non-null hash codes should not return whatever value you use for null.
Similar questions:
GetHashCode on null fields?
What should GetHashCode return when object's identifier is null?
Th...
Why is Dictionary preferred over Hashtable in C#?
...
For what it's worth, a Dictionary is (conceptually) a hash table.
If you meant "why do we use the Dictionary<TKey, TValue> class instead of the Hashtable class?", then it's an easy answer: Dictionary<TKey, TValue> is a generic type, Hashtable is not. That me...
List of special characters for SQL LIKE clause
What is the complete list of all special characters for a SQL (I'm interested in SQL Server but other's would be good too) LIKE clause?
...
Get loop counter/index using for…of syntax in JavaScript
...bj] of enumerate(myArray)) {
console.log(i, obj);
}
demo
If you actually did mean for…in – enumerating properties – you would need an additional counter. Object.keys(obj).forEach could work, but it only includes own properties; for…in includes enumerable properties anywhere on the pro...
How to read and write INI file with Python3?
...
The standard ConfigParser normally requires access via config['section_name']['key'], which is no fun. A little modification can deliver attribute access:
class AttrDict(dict):
def __init__(self, *args, **kwargs):
super(AttrDict, self).__init...
How to sort an ArrayList in Java [duplicate]
...Fruit fruit) {
//write code here for compare name
}
Then do call sort method
Collections.sort(fruitList);
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Objective-C declared @property attributes (nonatomic, copy, strong, weak)
... retaining the copy.
Assign
Assign is somewhat the opposite to copy. When calling the getter of an assign property, it returns a reference to the actual data. Typically you use this attribute when you have a property of primitive type (float, int, BOOL...)
Retain
retain is required when the attribut...
Format numbers to strings in Python
...}.html'.format(**d)
'http://xxx.yyy.zzz/user/42.html'
Like Python 2.6+, all Python 3 releases (so far) understand how to do both. I shamelessly ripped this stuff straight out of my hardcore Python intro book and the slides for the Intro+Intermediate Python courses I offer from time-to-time. :-)
...
How can I specify a [DllImport] path at runtime?
...ct, I got a C++ (working) DLL that I want to import into my C# project to call it's functions.
7 Answers
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What are the differences between NP, NP-Complete and NP-Hard?
... the technical definitions require quite some time to understand. First of all, let's remember a preliminary needed concept to understand those definitions.
Decision problem: A problem with a yes or no answer.
Now, let us define those complexity classes.
P
P is a complexity class that repres...