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Difference between two dates in MySQL
...ql.com/doc/refman/5.5/en/date-and-time-functions.html
for example:
mysql> SELECT DATEDIFF('2007-12-31 23:59:59','2007-12-30 00:00:00') * 24*60*60
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How to disable visual “dots” in Visual Studio Editor
...
Edit -> Advanced -> untick View White Space.
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Implementing Fast and Efficient Core Data Import on iOS 5
...That worked perfectly! Still, I'm going to try your suggestion of MASTER -> MAIN -> BG and see how that performance works out, that seems like a very interesting idea. Thank you for the great ideas!
– David Weiss
May 11 '12 at 13:06
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jQuery see if any or no checkboxes are selected
...ou can use something like this
if ($("#formID input:checkbox:checked").length > 0)
{
// any one is checked
}
else
{
// none is checked
}
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Blocks on Swift (animateWithDuration:animations:completion:)
...rite a closure that returned a bool the syntax would be
{(value: Bool) -> bool in
//your stuff
}
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Why does pattern matching in Scala not work with variables?
...ng) = {
val target: String = "a"
s match {
case `target` => println("It was" + target)
case _ => println("It was something else")
}
}
def mMatch2(s: String) = {
val Target: String = "a"
s match {
case Target => println("It was" + Target)
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How can I find the first occurrence of a sub-string in a python string?
...
find()
>>> s = "the dude is a cool dude"
>>> s.find('dude')
4
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Is there a stopwatch in Java?
...tead of direct calls to
System.nanoTime() for a few reasons:
An alternate time source can be substituted, for testing or performance reasons.
As documented by nanoTime, the value returned has no absolute meaning, and can only be interpreted as relative to another timestamp
returned by ...
How to convert Java String into byte[]?
... doesn't display very well. Calling toString() will just give you the default Object.toString() which is the class name + memory address. In your result [B@38ee9f13, the [B means byte[] and 38ee9f13 is the memory address, separated by an @.
For display purposes you can use:
Arrays.toString(bytes);...
Anonymous method in Invoke call
...e { this.Text = "hi"; });
// or since we are using C# 3.0
this.Invoke(() => { this.Text = "hi"; });
You can of course do the same with BeginInvoke:
public static void BeginInvoke(this Control control, Action action)
{
control.BeginInvoke((Delegate)action);
}
If you can't use C# 3.0, you ...