- Intent
- A high-order function/algorithm implementation
- Motivation
- a generic select->update->eval function with one argument, whose instances/application differ for different (argument, result) types required
- Implementation
- Simply cache the result into an array or other appropriate type
- Examples
class algorithm {
var $parameters=array();
function __construct( $select, $update, $eval) {
$this->parameters['select'] = $select;
$this->parameters['update'] = $update;
$this->parameters['eval'] = $eval;
}
function run($arg) {
$selections = $this->parameters['select']($arg);
$updates = $this->parameters['update']($selections);
return $this->parameters['eval']($updates);
}
}
//or with more syntax, not the parametrisation
function algorithm( $select, $update, $eval ) {
$args = func_get_args();
$args = array_slice($input, 3);
$selections = call_user_func_array( $select, $args);
$updates = call_user_func_array( $update, $selections);
return call_user_func_array( $eval, $updates);
}
