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What is the difference between varchar and varchar2 in Oracle?
...ARCHAR is reserved by Oracle to support distinction between NULL and empty string in future, as ANSI standard prescribes.
VARCHAR2 does not distinguish between a NULL and empty string, and never will.
If you rely on empty string and NULL being the same thing, you should use VARCHAR2.
...
private[this] vs private
...Without private[this]
object ObjectPrivateDemo {
def main(args: Array[String]) {
var real = new User("realUserName", "realPassword")
var guest = new User("dummyUserName", "dummyPassword")
real.displayUser(guest)
}
}
class User(val username:String,val password:String) {
private...
mmap() vs. reading blocks
...into your process. It's as if you memory mapped it yourself except with an extra copy step.
– Chris Smith
Oct 26 '08 at 21:53
6
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Check if a variable is a string in JavaScript
How can I determine whether a variable is a string or something else in JavaScript?
25 Answers
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How can you set class attributes from variable arguments (kwargs) in python
...args? Can kwargs even have an integer key? I'm pretty sure they have to be strings.
– wjandrea
Apr 22 at 19:12
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How to calculate the difference between two dates using PHP?
... displayed.
*
* @param DateInterval $interval The interval
*
* @return string Formatted interval string.
*/
function format_interval(DateInterval $interval) {
$result = "";
if ($interval->y) { $result .= $interval->format("%y years "); }
if ($interval->m) { $result .= $inte...
Java: Get month Integer from Date
...ime datetime = new DateTime(date);
int month = Integer.parseInt(datetime.toString("MM"))
…or…
int month = dateTime.getMonthOfYear();
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SQL query to select dates between two dates
...etween '2011/02/25' and '2011/02/27'
The date values need to be typed as strings.
To ensure future-proofing your query for SQL Server 2008 and higher, Date should be escaped because it's a reserved word in later versions.
Bear in mind that the dates without times take midnight as their defaults,...
How can I make a div not larger than its contents?
... not need shrink-to-fit element as often as one may think. Why do you need extra div around your table? Maybe table caption is all you need.
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How do I convert a column of text URLs into active hyperlinks in Excel?
... 200 entries.
NOTE: This solution does not work if the cell A1 contains a string longer than 255 characters. It results in a #VALUE! error
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