oop

问题 Today I come to your aid in favor of optimizing some code! I was asked to solve a problem on a test a few weeks ago, and came up with this non-optimal solution since I'm beggining to learn Javascript. I wonder if there's a way (of course there is) to make this better. Here's the situation: "I am a particular kind person who has an infinite ammount of $2, $5 and $10 dollar bills, and I'm willing to change cash for anyone who wants it, BUT in the most efficient way, with the minimum ammount of

问题 Today I come to your aid in favor of optimizing some code! I was asked to solve a problem on a test a few weeks ago, and came up with this non-optimal solution since I'm beggining to learn Javascript. I wonder if there's a way (of course there is) to make this better. Here's the situation: "I am a particular kind person who has an infinite ammount of $2, $5 and $10 dollar bills, and I'm willing to change cash for anyone who wants it, BUT in the most efficient way, with the minimum ammount of

问题 Today I come to your aid in favor of optimizing some code! I was asked to solve a problem on a test a few weeks ago, and came up with this non-optimal solution since I'm beggining to learn Javascript. I wonder if there's a way (of course there is) to make this better. Here's the situation: "I am a particular kind person who has an infinite ammount of $2, $5 and $10 dollar bills, and I'm willing to change cash for anyone who wants it, BUT in the most efficient way, with the minimum ammount of

问题 I stumbled across this behaviour, which suggests that you can use getattr to call methods on a class instance, as an alternative to the intuitively named operator.methodcaller : from operator import methodcaller class Foo(): def __init__(self, lst): self.lst = lst def summer(self): return sum(self.lst) my_obj = Foo(range(11)) res1 = methodcaller('summer')(my_obj) # 55 res2 = getattr(my_obj, 'summer')() # 55 assert res1 == res2 I'd like to understand, internally, why this works. Is it because

问题 I have a foreground service that is waiting for a shake. When it receives that motion, it sends out a broadcast with: Intent i = new Intent("com.company.app.shakeDetectedMessage"); sendBroadcast(i); My main activity receives this with a broadcast receiver which implements the method: @Override public void onReceive(Context context, Intent intent) { MainActivity.this.turnOnScreen(); Toast.makeText(getApplicationContext(), "Screen ON", Toast.LENGTH_SHORT).show(); } And my turn on screen method:

问题 I have a foreground service that is waiting for a shake. When it receives that motion, it sends out a broadcast with: Intent i = new Intent("com.company.app.shakeDetectedMessage"); sendBroadcast(i); My main activity receives this with a broadcast receiver which implements the method: @Override public void onReceive(Context context, Intent intent) { MainActivity.this.turnOnScreen(); Toast.makeText(getApplicationContext(), "Screen ON", Toast.LENGTH_SHORT).show(); } And my turn on screen method:

问题 I have a foreground service that is waiting for a shake. When it receives that motion, it sends out a broadcast with: Intent i = new Intent("com.company.app.shakeDetectedMessage"); sendBroadcast(i); My main activity receives this with a broadcast receiver which implements the method: @Override public void onReceive(Context context, Intent intent) { MainActivity.this.turnOnScreen(); Toast.makeText(getApplicationContext(), "Screen ON", Toast.LENGTH_SHORT).show(); } And my turn on screen method:

问题 As title say i'm starting to learn object oriented aspect of PHP. In this regard i made small "exercise" of sort "translating" one of my php functions into oo mode of php. I'm asking of your kind folks is there any recommendations you can give me concerning my predicament. Example of non-oo PHP: <?php function pristup($servername, $username, $password, $dbname, $sql){ $conn=new mysqli($servername, $username, $password, $dbname); if($conn->connect_error){ die("Neuspela konekcija: ".$conn-

问题 I have an issue that I am struggling to grasp. Any help would be greatly appreciated. I have an Object, and I assign the current object state to a property on the current object. example below: var product = { ropeType: 'blah', ropePrice: 'blah', ropeSections: { name: 'blaah', price: 'blaah' }, memory: false } product.memory = product; Now when I look at the product object within the console I get a inifinite recursion of Product.memory.Product.memory.Product.... screenshot below: I know its

问题 I'm writing a class and handful of functions to connect to the database and retrieve the information from the tables. I went through previous posts having similar titles, but most of them have written using mysql functions and I am using mysqli functions. I want somebody who can go through this simple script and let me know where I am making my mistake. This is my class.connect.php : <?php class mySQL{ var $host; var $username; var $password; var $database; public $dbc; public function