register()
Description:
Register a .dfx/.splx/.spl file as a function to be called.
Syntax:
register(f,spl)
Note:
The function registers a script file spl as function f to call it in a cellset script. Syntax of the function expression is f(xi,...), where xi,... is a parameter in the spl file. Use the comma to separate multiple parameters.
The function name is the one registered the last time.
The function cannot work in a multithreaded environment.
Parameter:
|
f |
Function name. |
|
spl |
.dfx/.splx/.spl file path, which can be an absolute path or a relative path; a relative path is relative to the main directory. |
Option:
|
@o |
In a function registered with @o, o in the invocation expression fn@o is the first (string) parameter value. If no option is specified in the invocation expression, the first (string) parameter value passed is regarded as null. |
Return value:
Result of executing the script file
Example:
Below is emp.splx:
|
|
A |
|
1 |
=connect("demo") |
|
2 |
In the invocation expression fn@o, |
|
3 |
return A2 |
Register emp.splx as a function and call it:
|
|
A |
|
|
1 |
=register("df1","D:/emp.splx") |
Register emp.splx as df1 function. |
|
2 |
=df1("HR","M") |
Call the registered function and pass parameter value:
|
Use @o option to register functions:
|
|
A |
|
|
1 |
=register@o("df2","D:/emp.splx") |
Use @o option to register emp.splx as a function and name it df2. |
|
2 |
=df2@HR("M") |
Call the function registered with the @o method, pass HR to it as value of parameter arg1, and return the following result:
|
|
3 |
=df2("HR","M") |
As df2 is registered through @o option, pass null value to the first parameter when df2() expression does not use that option and return an empty table sequence. |
