To show or hide a variable if null in AngularJs, you can use the snippet below.
Sample AngularJs
<div ng-show="myVariable == null"></div>
or
<div ng-show="myvar != null"></div>
null
IsNull extension method for C# and VB.NET
You can use the IsNull Extension method by using the snippet below.
Sample C#
public static bool IsNull(this object source)
{
return source == null;
}
Sample VB.NET
<System.Runtime.CompilerServices.Extension> _ Public Shared Function IsNull(source As Object) As Boolean Return source Is Nothing End Function
As always, this extension method has been added to the Github Fesslersoft.Extensions Repository
How to check if String is Null or Empty in XSL
To check if String is Null or Empty in XSL you can use the following snippet.
Sample XSL
<xsl:choose>
<xsl:when test="fieldToTest != ''">
<xsl:value-of select="Field1Value" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="Field2Value" />
</xsl:otherwise>
</xsl:choose>
IsNullOrEmpty function for PHP
This snippet will give you the IsNullOrEmpty function for PHP.
Sample PHP
function IsNullOrEmpty($input){
return (!isset($input) || trim($input)==='');
}
IsEmpty function for Javascript
This snippet will give you the IsEmpty function for Javascript.
Sample Javascript
String.prototype.IsEmpty = function(text) {
return this.valueOf() || text || "";
};
IsNull extension method for C# and VB.NET
IsNull extension method for C# and VB.NET.
Simple but very usefull!
Sample C#
public static bool IsNull(this object input)
{
return input== null;
}
Sample VB.NET
<System.Runtime.CompilerServices.Extension> _ Public Shared Function IsNull(input As Object) As Boolean Return input Is Nothing End Function
Usage (c#)
if (!myObject.IsNull())
{
// do something
}