Delete (Function)

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Queue, stack, list and array management functions

Deleting the last element

Various

See also

Delete (Function)

In french: Supprime

Deletes an element at a given position:

from a one-dimensional WLanguage array.
from an advanced array property (array of gglCalendar events, etc.).
from an associative array.
into a WLanguage list.

The array size is automatically reduced.

Remarks:

This function is equivalent to ArrayDelete.
This function can only be used with Array and Associative Array variables.

Versions 16 and later

This function is now available for PHP sites.

New in version 16

This function is now available for PHP sites.

This function is now available for PHP sites.

Versions 21 and later

This function is now available in browser code.

New in version 21

This function is now available in browser code.

Example

MyArray is array of 2 strings
MyArray[1] = "WINDEV"
MyArray[2] = "WEBDEV"
// Delete the 1st element
Delete(MyArray, 1) // Deletes "WINDEV"
// Display the 1st element
Trace(MyArray[1]) // Displays "WEBDEV"

// Associative array Last Name - First Name
aaLastNameFirstName is associative array of strings
Insert(aaLastNameFirstName, "Smith", "Tommy")
Insert(aaLastNameFirstName, "Montgomery", "Julia")
Delete(aaLastNameFirstName, "Smith")
// Deletion during a browse
sLastName is string
sFirstName is string
FOR EACH ELEMENT sFirstName, sLastName OF aaLastNameFirstName
Trace(sFirstName + ":" + sLastName)
Delete(aaLastNameFirstName, CurrentElement)
END

Syntax

Deleting an element from a WLanguage array or from an advanced array property Hide the details

<Result> = Delete(<WLanguage array> , <Element subscript>)

<Result>: Integer

Number of deleted elements (always corresponds to 1).

<WLanguage array>: Array

Name of Array variable to use. This array must be a one-dimensional array.

<Element subscript>: Integer

Subscript of element to delete. A WLanguage error occurs if this parameter is greater than the number of array elements.
Versions 17 and later
The following constants can be used:
FirstElement The first array element is deleted.
CurrentElement The current element is deleted. This constant is used to delete the current element during a FOR EACH browse.
This constant is only available for associative arrays.
New in version 17
The following constants can be used:
FirstElement The first array element is deleted.
CurrentElement The current element is deleted. This constant is used to delete the current element during a FOR EACH browse.
This constant is only available for associative arrays.
The following constants can be used:
FirstElement The first array element is deleted.
CurrentElement The current element is deleted. This constant is used to delete the current element during a FOR EACH browse.
This constant is only available for associative arrays.

Deleting an element from an associative array Hide the details

<Result> = Delete(<WLanguage array> , <Element key>)

<Result>: Integer

Number of deleted elements:
1 or 0 for the associative arrays without duplicates.
0 to N for the associative arrays with duplicates.

<WLanguage array>: Associative array

Name of Associative Array variable to use.

<Element key>: Integer

Value of key corresponding to the element to delete.
In an associative array without duplicate: If the element exists, it is deleted ; if the element does not exist, no operation is performed.
In an associative array with duplicates: If the element exists, all the <Element Key> elements are deleted ; if the element does not exist, no operation is performed.
This parameter can also correspond to the CurrentElement constant. This syntax is used to delete the current element during a FOR EACH browse.

Not available in browser code and in PHP

Deleting an element from a List variable Hide the details

<Result> = Delete(<WLanguage list> , <Element subscript>)

<Result>: Integer

Number of deleted elements (1 for the lists).

<WLanguage list>: List

Name of List variable to use.

<Element subscript>: Integer constant

Subscript of list where the element will be deleted. The following constants can be used:
FirstElement The first element found in the list is deleted.
LastElement The last element found in the list is deleted.
CurrentElement The current element is deleted. For a list, this constant is available when browsing the list elements (during a FOR EACH browse).

Remarks

Deleting the last element

If the last element is deleted, the array is resized to 0. The array has not been deleted: new additions can be performed without re-creating the array.

Various

This function cannot be used with the fixed arrays.

Component: wd260vm.dll