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delete vs delete[] operators in C++
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The delete operator deallocates memory and calls the destructor for a single object created with new.
The delete [] operator deallocates memory and calls destructors for an array of objects created with new [].
Using delete on a pointer returned by new [] or delete ...
Functions that return a function
...ce to the function. Putting the parenthesis at the end of a function name, calls the function, returning the functions return value.
Demo
function a() {
alert('A');
}
//alerts 'A', returns undefined
function b() {
alert('B');
return a;
}
//alerts 'B', returns function a
function c() ...
SQL how to increase or decrease one for a int column in one command
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To answer the second:
There are several ways to do this. Since you did not specify a database, I will assume MySQL.
INSERT INTO table SET x=1, y=2 ON DUPLICATE KEY UPDATE x=x+1, y=y+2
REPLACE INTO table SET x=1, y=2
They both can handle your question. However, the first syntax allows for...
Is asynchronous jdbc call possible?
I wonder if there is a way to make asynchronous calls to a database?
16 Answers
16
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What is the best way to implement “remember me” for a website? [closed]
...the standard session management cookie.
The login cookie contains a series identifier and a token. The series and token are unguessable random numbers from a suitably large space. Both are stored together in a database table, the token is hashed (sha256 is fine).
When a non-logged-in user visits the...
Why is a div with “display: table-cell;” not affected by margin?
... property is not applicable to display:table-cell elements.
Solution
Consider using the border-spacing property instead.
Note it should be applied to a parent element with a display:table layout and border-collapse:separate.
For example:
HTML
<div class="table">
<div class="row"&g...
How To: Best way to draw table in console app (C#)
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You could do something like the following:
static int tableWidth = 73;
static void Main(string[] args)
{
Console.Clear();
PrintLine();
PrintRow("Column 1", "Column 2", "Column 3", "Column 4");
PrintLine();
PrintRow("", "", "", "");
PrintRow("", "", "", "");
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Spring Data JPA - “No Property Found for Type” Exception
... is just a service using the UserBoardRepository.
– Didier L
Apr 9 '19 at 15:48
that's my case! I had no problem befor...
Calling generic method with a type argument known only at execution time [duplicate]
...ot notation - there's no point in using a query expression when you've basically just got a where clause.
using System;
using System.Linq;
using System.Reflection;
namespace Interfaces
{
interface IFoo {}
interface IBar {}
interface IBaz {}
}
public class Test
{
public static void...
Calling outer class function from inner class [duplicate]
I have implemented a nested class in Java, and I need to call the outer class method from the inner class.
2 Answers
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