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How to compute the sum and average of elements in an array?
...age is: " + avg );
Just iterate through the array, since your values are strings, they have to be converted to an integer first. And average is just the sum of values divided by the number of values.
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#1071 - Specified key was too long; max key length is 1000 bytes
...e best practice is to use prefix indexes so you're only indexing a left substring of the data. Most of your data will be a lot shorter than 255 characters anyway.
You can declare a prefix length per column as you define the index. For example:
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KEY `index` (`parent_menu_id`,`menu_link`(50),`p...
Binding an enum to a WinForms combo box, and then setting it
...item
Status status;
Enum.TryParse<Status>(cbStatus.SelectedValue.ToString(), out status);
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Using a Single Row configuration table in SQL Server database. Bad idea?
... same default value (null/empty?)
negative: everything has to be stored as strings (ie. nvarchar)
negative: when dealing with the settings in code, you have to know what type a setting is and cast it
The single row option is by far the easiest one to work with. This is because you can store each se...
What are all the uses of an underscore in Scala?
...ame: => Int): () => Int = callByName _
Default initializer
var x: String = _ // unloved syntax may be eliminated
There may be others I have forgotten!
Example showing why foo(_) and foo _ are different:
This example comes from 0__:
trait PlaceholderExample {
def process[A](f: A =...
Are foreign keys really necessary in a database design?
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That's a horrible answer FKs genaerally can add extra overhead not improve performance.
– Agile Jedi
Feb 13 '15 at 18:42
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How do I find all files containing specific text on Linux?
...d a way to scan my entire Linux system for all files containing a specific string of text. Just to clarify, I'm looking for text within the file, not in the file name.
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How to create EditText with rounded corners? [closed]
...ent"
android:layout_height="wrap_content"
android:text="@string/hello"
android:background="@drawable/rounded_edittext_states"
android:padding="5dip" />
</LinearLayout>
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What is getattr() exactly and how do I use it?
...ecause you don't know in advance which attribute you want (it comes from a string). Very useful for meta-programming.
you want to provide a default value. object.y will raise an AttributeError if there's no y. But getattr(object, 'y', 5) will return 5.
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What is Delegate? [closed]
...eferred to as type safe function pointer. Here I am giving an example with String.
The following example shows a delegate operation:
namespace MyDelegate
{
class Program
{
private delegate void Show(string s);
// Create a method for a delegate.
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