To check for another function, change the $function_name variable's value: <?php $function_name = "fsockopen"; if ( function_exists($function_name) ) { echo "$function_name is enabled"; } else { echo "$function_name is not enabled"; } ?> Save the file as function.php or ...
Inverse Of A Function:A function which reverses a given function is called inverse of a function. For a function y = f(x), if there exists some function which maps from y to x and g(y) = x, then the function g is called the inverse of function f. Denoted by {eq}f^{-1} {...
To determine if a source is registered on a remote computer, specify the computer name as a second parameter. The following code shows an example: VB Copy If Not EventLog.SourceExists("MyApp1", "myserver") Then Dim create As New EventSourceCreationData("MyApp1", "Application") create.Ma...
ISNUMBER(#N/A) → returns TRUE for any number values otherwise FALSE Output → FALSE Press Enter and drag down the Fill Handle tool. Here are the results. Read More: How to Use Excel IF Function with Range of Values Method 5 – Check If a Value Exists in a Range Using IF, ISNA, ...
Dim StrList() As String = {"abc", "qwe", "zxc"} Dim chkStr As String = "ABC" If Array.Find(StrList, Function(x) x.ToLower = chkStr.tolower) IsNot Nothing Then MsgBox("Item Exists") Else MsgBox("Item Not Exists") End If thanks...
It’s important to note that the first derivative test assumes the differentiability of the function, meaning that the derivative exists for all points in the domain of the function. It is also worth mentioning that the test can only determine if the function is strictly increasing or decreasi...
2. You could always iterate over the nodes in the collection and see if a node with the provided Text value already exists #1: TreeNode a = treeView1.SelectedNode; if (a.Nodes.ContainsKey(textBox1.Text)) { MessageBox.Show("Please Rename"); } else { TreeNode tn = new TreeNode(); ...
Here's a table summarizing the main differences between the INDEX and MATCH functions in Excel: 2. What function can we use to compare 2 lists in Excel? To compare two lists in Excel and determine if an item exists in both lists, use the MATCH function with the IF function: ...
If member switches have the stacking function disabled, run the stack enable command to enable this function. Check whether member switches have offline configuration. The configuration marked with an asterisk (*) is offline configuration. If offline configuration exists, you...
Determine the appropriate page file size Use the following considerations for page file sizing for all versions of Windows and Windows Server. Crash dump setting If you want a crash dump file to be created during a system crash, a page file or a dedicated dump file must exist and be large...