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In C#, what happens when you call an extension method on a null object?
... is actually useful in a few cases:
public static bool IsNullOrEmpty(this string value)
{
return string.IsNullOrEmpty(value);
}
public static void ThrowIfNull<T>(this T obj, string parameterName)
where T : class
{
if(obj == null) throw new ArgumentNullException(parameterName);...
How to remove leading zeros from alphanumeric text?
...es, but leaves one if necessary (i.e. it wouldn't just turn "0" to a blank string).
s.replaceFirst("^0+(?!$)", "")
The ^ anchor will make sure that the 0+ being matched is at the beginning of the input. The (?!$) negative lookahead ensures that not the entire string will be matched.
Test harness...
Why would adding a method add an ambiguous call, if it wouldn't be involved in the ambiguity
...o promises.)
A correct analysis follows. The candidates are:
0: C(params string[]) in its normal form
1: C(params string[]) in its expanded form
2: C<string>(string)
3: C(string, object)
Candidate zero is obviously inapplicable because string is not convertible to string[]. That leaves t...
Newline in string attribute
...
When you need to do it in a string (eg: in your resources) you need to use xml:space="preserve" and the ampersand character codes:
<System:String x:Key="TwoLiner" xml:space="preserve">First line&#10;Second line</System:String>
Or lite...
Reflection - get attribute name and value on property
...e dynamic by passing types into the routine):
public static Dictionary<string, string> GetAuthors()
{
Dictionary<string, string> _dict = new Dictionary<string, string>();
PropertyInfo[] props = typeof(Book).GetProperties();
foreach (PropertyInfo prop in props)
{
...
Color different parts of a RichTextBox string
I'm trying to color parts of a string to be appended to a RichTextBox. I have a string built from different strings.
9 Answ...
Regex to replace multiple spaces with a single space
Given a string like:
23 Answers
23
...
Check if list contains element that contains a string and get that element
...u should be able to use Linq here:
var matchingvalues = myList
.Where(stringToCheck => stringToCheck.Contains(myString));
If you simply wish to return the first matching item:
var match = myList
.FirstOrDefault(stringToCheck => stringToCheck.Contains(myString));
if(match != null)
...
Best way to format integer as string with leading zeros? [duplicate]
I need to add leading zeros to integer to make a string with defined quantity of digits ($cnt).
What the best way to translate this simple function from PHP to Python:
...
Using LINQ to remove elements from a List
...
Simple solution:
static void Main()
{
List<string> myList = new List<string> { "Jason", "Bob", "Frank", "Bob" };
myList.RemoveAll(x => x == "Bob");
foreach (string s in myList)
{
//
}
}
...