pkg_.contains(P;K)
Returns a boolean indicating whether package P contains key
K (a string).
Description
pkg_.contains is a user-defined function (defined with
<def_ufun/>). If you are not running your query in GUI2,
pkg_.contains will only work if you import the
pkg_ library: <import
path="default.library.types.pkg_"/>.
Syntax
pkg_.contains(P;K)Input
| Argument | Type | Description |
|---|---|---|
P |
any | The name of a package variable |
K |
any | The name of a key |
Return Value
If packageP
contains key K, pkg_.contains returns a boolean value
of 1 (true). Otherwise, it returns 0.Example
<set x="{pkg('key1' 'key2';'val1' 'val2')}"/> <signal msg="{pkg_.contains(@x;'key1')}"/>
In the example above, the package x contains the key
'key1', so pkg_.contains returns a boolean
value of 1 (true).