vely:set-input

set-input

Purpose: Set or overwrite input parameters.

set-input <param name> = <param value>
set-input sets or overwrites an input-parameter. <param name> is a string that holds parameter name and <param value> is a string that holds parameter value.

If an input parameter with <param name> already exists, it's value is overwritten with <param value>.

If an input parameter with <param name> does not exist, a new parameter is created and its value is set to <param value>.

Note that no copy of <param value> is made. If it will go out of scope before it's used, make a copy first (see copy-string).

set-input is useful when input parameters supplied through a request need to be altered or added-to so your code can process them more efficiently, to write less code etc.

Once set-input sets parameter value, using input-param will obtain it as if it was provided through a request URL.

Note that input-param creates a variable, so you cannot use it twice in the same scope. Typically, set-input is used to set input parameter values, while another code block or function will use input-param to obtain those values.

Examples

Set the value of input parameter named "quantity" to "0", which is also the output:

set-input "quantity" = "0"
...
input-param quantity
p-out quantity

Set the value of input parameter named "description" to "not available", which is also the output:

char *name = "description";
set-input name = "not available"
...
input-param description
p-out description