function

问题 I have an array with all categories stored in it: $allCatArray = array( ['departments/outdoor/123123/'] => stdClass Object ( [i] => 1 [id] => 'departments/outdoor/123123/' [pid] => 'departments/outdoor/' [name] => 'Child Category Name' ) ['departments/outdoor/'] => stdClass Object ( [i] => 1 [id] => 'departments/outdoor/' [pid] => '0' [name] => 'Main Category Name' ) I need detect the highest category in hierarchy when i have id of lower category in hierarchy. So I have this function:

问题 I have an array with all categories stored in it: $allCatArray = array( ['departments/outdoor/123123/'] => stdClass Object ( [i] => 1 [id] => 'departments/outdoor/123123/' [pid] => 'departments/outdoor/' [name] => 'Child Category Name' ) ['departments/outdoor/'] => stdClass Object ( [i] => 1 [id] => 'departments/outdoor/' [pid] => '0' [name] => 'Main Category Name' ) I need detect the highest category in hierarchy when i have id of lower category in hierarchy. So I have this function:

问题 I have an array with all categories stored in it: $allCatArray = array( ['departments/outdoor/123123/'] => stdClass Object ( [i] => 1 [id] => 'departments/outdoor/123123/' [pid] => 'departments/outdoor/' [name] => 'Child Category Name' ) ['departments/outdoor/'] => stdClass Object ( [i] => 1 [id] => 'departments/outdoor/' [pid] => '0' [name] => 'Main Category Name' ) I need detect the highest category in hierarchy when i have id of lower category in hierarchy. So I have this function:

问题 I have an activity that contains all the functions for controlling my database, and I want all other activities to use to these functions when interacting with the database. Below is an example of my problem. Clock script: public class Clock extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_clock); Data.createTable(); //<<< } //... } Data script: public class Data extends Activity {

问题 I tried to modify the value of a string inside a function, like below: >>> def appendFlag(target, value): ... target += value ... target += " " ... >>> appendFlag <function appendFlag at 0x102933398> >>> appendFlag(m,"ok") >>> m '' Well, seems the "target" is only changed within the function, but how to make the new value viable outside the function? Thanks. 回答1: This is handled in python by returning. def appendFlag(target, value): target += value target += " " return target you can use it

问题 I tried to modify the value of a string inside a function, like below: >>> def appendFlag(target, value): ... target += value ... target += " " ... >>> appendFlag <function appendFlag at 0x102933398> >>> appendFlag(m,"ok") >>> m '' Well, seems the "target" is only changed within the function, but how to make the new value viable outside the function? Thanks. 回答1: This is handled in python by returning. def appendFlag(target, value): target += value target += " " return target you can use it

问题 I understand that one should not use mutable default parameter value in Python (with some exceptions) because this value is evaluated and stored only once when the function is defined, and not each time the function is later called. My understanding of that is this (using the example below; please excuse my imprecise language as I'm just a beginner in Python programming, who's stuck at the Function chapter of my textbook because of this): def f(x = [1, 2, 3]): x.append(4) print(x) f() f() 1)

问题 The function below is supposed compute either the Uval and Lval functions in accordance to Set and Numbers . For the first two numbers U and 52599 are in relation and L and 52550 are in relation, since the second number has the label L the Lval equation is used. The previous number is function is previous = numbers[1:] and the current function is current = numbers[:-1] . So (52550 - 52599)/52550 * -100 will be the computation for the first two numbers. The equations are supposed to be

问题 The function below is supposed compute either the Uval and Lval functions in accordance to Set and Numbers . For the first two numbers U and 52599 are in relation and L and 52550 are in relation, since the second number has the label L the Lval equation is used. The previous number is function is previous = numbers[1:] and the current function is current = numbers[:-1] . So (52550 - 52599)/52550 * -100 will be the computation for the first two numbers. The equations are supposed to be

问题 How do I take a vector of function argument AST variants, extract the values, and use them to instantiate a function call? I am writing an interpreter that evaluates certain expressions. Some of the expressions are function calls. I am having a hard time figuring out how to translate the function calls AST to the actual call. The AST gives me the function name and a vector of arguments. I can lookup the function pointer to call from the name using a map, but passing the arguments to the