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MySQL “NOT IN” query
...s not seem to depend on data distribution, number of values in both tables etc., as long as both fields are indexed. Since there are three pieces of code in MySQL that essentialy do one job, it is possible that the code responsible for EXISTS makes some kind of an extra check which takes extra time....
What's the difference between HEAD^ and HEAD~ in Git?
... the parent of the commit (~~ and ^^ both refer to the grandparent commit, etc.) But they differ in meaning when they are used with numbers:
~2 means up two levels in the hierarchy, via the first parent if a commit has more than one parent
^2 means the second parent where a commit has more than on...
Delete an element from a dictionary
... the copy module.
Note that making a copy for every dict del/assignment/etc. means you're going from constant time to linear time, and also using linear space. For small dicts, this is not a problem. But if you're planning to make lots of copies of large dicts, you probably want a different data ...
How to check certificate name and alias in keystore files?
...n("alias name: " + alias);
Certificate certificate = keystore.getCertificate(alias);
System.out.println(certificate.toString());
}
} catch (java.security.cert.CertificateException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
...
Object.watch() for all browsers?
...him for this a while ago. It works in IE8, Safari, Chrome, Firefox, Opera, etc.
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Convert a char to upper case using regular expressions (EditPad Pro)
...
You can also capitalize the first letter of the match using \I1 and \I2 etc instead of $1 and $2.
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Naming of ID columns in database tables
...ys have table alias such as "i" for inoice, p for "product" on SQL or LINQ etc.
– Cheung
Oct 13 '14 at 7:50
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Encrypting & Decrypting a String in C# [duplicate]
... you to "muck about" with byte arrays, salts, keys, initialization vectors etc. but this is precisely the kind of detail that can be somewhat abstracted away within your "wrapper" class.
The following class is one I wrote a while ago to perform exactly the kind of thing you're after, a simple singl...
How to call base.base.method()?
... {
Standard,
BaseFunctionality,
Verbose
//etc
}
protected Mode Mode
{
get; set;
}
public override void Say()
{
if(this.Mode == Mode.BaseFunctionality)
base.Say();
else
Console.WriteLine("Called...
How can I change the image displayed in a UIImageView programmatically?
...c, I can't see any hints about programmatically changing it. Do I have to fetch an UIImage object from that UIImageView ?
...