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Can table columns with a Foreign Key be NULL?
...otherwise I would get a constraint violation error (as opposed to an empty string).
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What is SQL injection? [duplicate]
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SQL injection happens when you interpolate some content into a SQL query string, and the result modifies the syntax of your query in ways you didn't intend.
It doesn't have to be malicious, it can be an accident. But accidental SQL injection is more likely to result in an error than in a vulnera...
Is there a MySQL command to convert a string to lowercase?
...se the functions LOWER() or LCASE().
These can be used both on columns or string literals. e.g.
SELECT LOWER(column_name) FROM table a;
or
SELECT column_name FROM table a where column = LOWER('STRING')
LCASE() can be substituted for LOWER() in both examples.
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Regular expression for exact match of a string
...he title of the question is misleading; he's trying to make sure two whole strings are exactly the same. Also, \w matches digits as well as letters, so [\w\d] is redundant.
– Alan Moore
Apr 17 '14 at 2:54
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How can I convert my device token (NSData) into an NSString?
I am implementing push notifications. I'd like to save my APNS Token as a String.
29 Answers
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Performance difference between IIf() and If
...1
Sub Main()
Dim test As Boolean = False
Dim result As String = IIf(test, Foo(), Bar())
End Sub
Public Function Foo() As String
Console.WriteLine("Foo!")
Return "Foo"
End Function
Public Function Bar() As String
Console.WriteLine("Bar!")
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When to encode space to plus (+) or %20?
...encode a space in either of these contexts. So if you need to URL-encode a string for inclusion in part of a URL, it is always safe to replace spaces with %20 and pluses with %2B. This is what eg. encodeURIComponent() does in JavaScript. Unfortunately it's not what urlencode does in PHP (rawurlencod...
How do you loop through currently loaded assemblies?
... the database connection(s), display the current appSettings and ConnectionStrings, etc. A section of this page displays the Assembly versions of important types used throughout, but I could not figure out how to effectively show the versions of ALL of the loaded assemblies.
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Creating JSON on the fly with JObject
...perties.
This is a Sample User Properties
public class User
{
public string Name;
public string MobileNo;
public string Address;
}
and i want this property in newtonsoft JObject is:
JObject obj = JObject.FromObject(new User()
{
Name = "Manjunath",
MobileNo = "9876543210",
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Can functions be passed as parameters?
...es:
package main
import "fmt"
// convert types take an int and return a string value.
type convert func(int) string
// value implements convert, returning x as string.
func value(x int) string {
return fmt.Sprintf("%v", x)
}
// quote123 passes 123 to convert func and returns quoted string.
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