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Prefer composition over inheritance?
...f OO design (inheritance, polymorphism, encapsulation).
class Person {
String Title;
String Name;
Int Age
}
class Employee : Person {
Int Salary;
String Title;
}
This is inheritance at work. The Employee "is a" Person or inherits from Person. All inheritance relationships are "is-...
get dictionary key by value
...ce where all fields are initialized with their default value(like null for strings or 0 for ints). So you won't get an exception. But you also don't know if you have found a value, so this answer doesn't cover the case that the value doesn't exist.
– Tim Schmelter
...
Python: TypeError: cannot concatenate 'str' and 'int' objects [duplicate]
I have this python program that adds strings to integers:
9 Answers
9
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How to join int[] to a character separated string in .NET?
...
var ints = new int[] {1, 2, 3, 4, 5};
var result = string.Join(",", ints.Select(x => x.ToString()).ToArray());
Console.WriteLine(result); // prints "1,2,3,4,5"
EDIT: As of (at least) .NET 4.5,
var result = string.Join(",", ints.Select(x => x.ToString()).ToArray());
...
Why a function checking if a string is empty always returns true? [closed]
I have a function isNotEmpty which returns true if the string is not empty and false if the string is empty. I've found out that it is not working if I pass an empty string through it.
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How do I put double quotes in a string in vba?
... I prefer creating a global variable: Public Const vbDoubleQuote As String = """" 'represents 1 double quote (") Public Const vbSingleQuote As String = "'" 'represents 1 single quote (') and using it like so: Shell "explorer.exe " & vbDoubleQuote & sPath & vbDoubleQuote, ...
Can JSON start with “[”?
From what I can read on json.org , all JSON strings should start with { (curly brace), and [ characters (square brackets) represent an array element in JSON.
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Difference between filter and filter_by in SQLAlchemy
... filter on users.id. Instead, it will evaluate id == id as True and return all users. You need to use .filter(users.id == id) (as demoed above). I made this mistake earlier today.
– Nico Cernek
Feb 22 '19 at 23:00
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Why does this code using random strings print “hello world”?
...e share your code. I would greatly appreciate it.
public static void main(String[] args) {
long time = System.currentTimeMillis();
generate("stack");
generate("over");
generate("flow");
generate("rulez");
System.out.println("Took " + (System.currentTimeMillis() - time) + " ...
What are file descriptors, explained in simple terms?
...you open a network socket, it is also represented by an integer and it is called Socket Descriptor.
I hope you understand.
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