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SQL ON DELETE CASCADE, Which Way Does the Deletion Occur?
...ould restructure your schema into this,
CREATE TABLE Categories
(
Code CHAR(4) NOT NULL PRIMARY KEY,
CategoryName VARCHAR(63) NOT NULL UNIQUE
);
CREATE TABLE Courses
(
CourseID INT NOT NULL PRIMARY KEY,
BookID INT NOT NULL,
CatCode CHAR(4) NOT NULL,
CourseNum CHAR(3) NOT NULL,
Cour...
How to delete duplicate lines in a file without sorting it in Unix?
... <sniff> makes me sad. ;) Anyways, [ -~] represents a range of ASCII characters from 0x20 (space) to 0x7E (tilde). These are considered the printable ASCII characters (linked page also has 0x7F/delete but that doesn't seem right). That makes the solution broken for anyone not using ASCII or an...
What breaking changes are introduced in C++11?
...hose for others to elaborate on.
Core language
#define u8 "abc"
const char *s = u8"def"; // Previously "abcdef", now "def"
#define _x "there"
"hello"_x // now a user-defined-string-literal. Previously, expanded _x .
New keywords: alignas, alignof, char16_t, char32_t, constexpr, declt...
Best way to track onchange as-you-type in input type=“text”?
...e', inputHandler); // for IE8
// Firefox/Edge18-/IE9+ don’t fire on <select><option>
// source.addEventListener('change', inputHandler);
<input id="source">
<div id="result"></div>
...
Undefined, unspecified and implementation-defined behavior
...t's look at a classic example:
#include <iostream>
int main()
{
char* p = "hello!\n"; // yes I know, deprecated conversion
p[0] = 'y';
p[5] = 'w';
std::cout << p;
}
The variable p points to the string literal "hello!\n", and the two assignments below try to modify tha...
Generic type parameter naming convention for Java (with multiple chars)?
...rfaces I wrote I'd like to name generic type parameters with more than one character to make the code more readable.
5 Answ...
Forward an invocation of a variadic function in C
...t. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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C/C++ check if one bit is set in, i.e. int variable
...
What the selected answer is doing is actually wrong. The below function will return the bit position or 0 depending on if the bit is actually enabled. This is not what the poster was asking for.
#define CHECK_BIT(var,pos) ((var) &...
How to persist a property of type List in JPA?
...<List<String>, String> {
private static final String SPLIT_CHAR = ";";
@Override
public String convertToDatabaseColumn(List<String> stringList) {
return String.join(SPLIT_CHAR, stringList);
}
@Override
public List<String> convertToEntityAttri...
Regex doesn't work in String.matches()
...wercase letters, you can use .matches(), but you need to match one or more characters: append a + to your character class, as in [a-z]+. Or use ^[a-z]+$ and .find().
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