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How can you represent inheritance in a database?
...an existing one.
There is also no risk that an inappropriate attribute is set for a particular subtype, such as the vehicle_reg_no field for a property policy.
There is no need for the type attribute as in the single table method. The type is now defined by the metadata: the table name.
However ...
Secure hash and salt for PHP passwords
...
Use PBKDF2 if you cannot use either bcrypt or scrypt, with SHA2 hashes.
Reset everyone's passwords when the database is compromised.
Implement a reasonable 8-10 character minimum length, plus require at least 1 upper case letter, 1 lower case letter, a number, and a symbol. This will improve the en...
An invalid form control with name='' is not focusable
...tribute of the control correctly. If the type attribute of a button is not set to button, Chrome (or any other browser for that matter) performs a validation each time the button is clicked because submit is the default value of a button's type attribute.
To solve the problem, if you have a button...
Cannot delete directory with Directory.Delete(path, true)
...tories(target_dir);
foreach (string file in files)
{
File.SetAttributes(file, FileAttributes.Normal);
File.Delete(file);
}
foreach (string dir in dirs)
{
DeleteDirectory(dir);
}
Directory.Delete(target_dir, false);
}
Also, for me I personally ...
Most efficient way to make the first character of a String lower case?
...est4 used StringBuilder.
StringBuilder sb = new StringBuilder(string);
sb.setCharAt(0, Character.toLowerCase(sb.charAt(0)));
string = sb.toString();
test5 used two substring() calls.
string = string.substring(0, 1).toLowerCase() + string.substring(1);
test6 uses reflection to change char value[]...
How to scale SVG image to fill browser window?
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
Converting a Date object to a calendar object [duplicate]
...dar toCalendar(Date date){
Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal;
}
Everything else you are doing is both wrong and unnecessary.
BTW, Java Naming conventions suggest that method names start with a lower case letter, so it should be: dateToCalendar or toCalend...
Undo git update-index --assume-unchanged
...
To get undo/show dir's/files that are set to assume-unchanged run this:
git update-index --no-assume-unchanged <file>
To get a list of dir's/files that are assume-unchanged run this:
git ls-files -v|grep '^h'
...
How to get text box value in JavaScript
...
Set the id attribute of the input to txtJob. Your browser is acting quirky when you call getElementById.
share
|
improve th...
Finding the direction of scrolling in a UIScrollView?
...dScroll delegate. In this sample, I created a variable named lastContentOffset which I use to compare the current content offset with the previous one. If it's greater, then the scrollView is scrolling right. If it's less then the scrollView is scrolling left:
// somewhere in the private class exte...