while-loop

问题 I made my scripts without class. (framework). Now I have changed my mind & I wanna make my scripts with classes. I like it. But there I have a problem.. Infinite Loop While. I didn't take this problem before with without classes.. While Rule; while ($fetch=$db->fetchObject($db->q("SELECT * FROM auction_house.items ORDER BY id DESC LIMIT ".$min_stuff.",".$max_stuff.""))) { // etc } Class; public function fetchObject($queryRes) { $this->queryRes = $queryRes; $this->record = mysql_fetch_object(

问题 producttable : id | mid | pid | owgh | nwgh | 1 3 12 1.5 0.6 2 3 12 1.5 0.3 3 3 14 0.6 0.4 4 3 15 1.2 1.1 5 4 16 1.5 1.0 6 4 17 2.4 1.2 7 3 19 3.0 1.4 8 3 19 3.0 1.2 I need result in while loop as below : as per mysql query $sql = "SELECT pid,owgh,nwgh from produttable WHERE mid = 3 "; RESULT I WANT AS BELOW : Product Id | Old weight | New weight --------------------------------------- 12 1.5 0.6 12 1.5 0.3 Tot: 3.0 0.9 -------------------------------- 14 0.6 0.4 Tot: 0.6 0.4 ----------------

问题 producttable : id | mid | pid | owgh | nwgh | 1 3 12 1.5 0.6 2 3 12 1.5 0.3 3 3 14 0.6 0.4 4 3 15 1.2 1.1 5 4 16 1.5 1.0 6 4 17 2.4 1.2 7 3 19 3.0 1.4 8 3 19 3.0 1.2 I need result in while loop as below : as per mysql query $sql = "SELECT pid,owgh,nwgh from produttable WHERE mid = 3 "; RESULT I WANT AS BELOW : Product Id | Old weight | New weight --------------------------------------- 12 1.5 0.6 12 1.5 0.3 Tot: 3.0 0.9 -------------------------------- 14 0.6 0.4 Tot: 0.6 0.4 ----------------

问题 def AddSingleCard(self): symbols = ['heart', 'diamond', 'club', 'spade'] #newCardSign = '' newCardNumber, newCardSign = raw_input().split() try: newCardNumber = int(float(newCardNumber)) except: newCardNumber, newCardSign = raw_input().split() while (newCardNumber not in (2,15) or newCardSign not in symbols): newCardNumber, newCardSign = raw_input().split() newCard = [newCardNumber, newCardSign] I'm trying to loop until the input will be a number between 2-15, and the string will be one of

问题 How can I ask the user for a file name and if it already exists, ask the user if they want to overwrite it or not, and obey their request. If the file does not exist, a new file (with the selected name) should be created. From some research on both the Python website and Stack Overflow, I've come up with this code try: with open(input("Please enter a suitable file name")) as file: print("This filename already exists") except IOError: my_file = open("output.txt", "r+") But this will not run in

问题 I have a while loop that scans in an input set of integers. It scans and prints all of the numbers with "..." at the end and skips to the next line. However, the script does not: execute past the while loop and print TEST. For example, I enter: 3 44 62 1 It prints: 3... 44... 62... 1... When it should print: 3... 44... 62... 1... TEST while(scanf("%d", &n) != -1) { x[i] = n; i++; printf("%d", n); printf("...\n"); } printf("TEST"); What am I doing wrong? 回答1: scanf("%d", &n) != 1 is wrong. It

问题 I would like to know if there is some way to vectorize this code. I tried so hard to do it... but failed. while (delta_F > e) && (i < maxLoop) x1 = x0+d; y0 = f(x0); y1 = f(x1); if y1 < y0 x0= x1; d = a*d; else vF = [vF;x1]; d = -b*d; end i = i + 1; if length(vF) > 1 ultm = vF(end); pultm = vF(end-1); delta_F = abs(ultm+pultm)/2; end end It's a simple implementation of the Rosenbrock method for finding the min of a function. 回答1: In general, Matlab's vectorization works over fixed-size arrays

问题 I would like to know if there is some way to vectorize this code. I tried so hard to do it... but failed. while (delta_F > e) && (i < maxLoop) x1 = x0+d; y0 = f(x0); y1 = f(x1); if y1 < y0 x0= x1; d = a*d; else vF = [vF;x1]; d = -b*d; end i = i + 1; if length(vF) > 1 ultm = vF(end); pultm = vF(end-1); delta_F = abs(ultm+pultm)/2; end end It's a simple implementation of the Rosenbrock method for finding the min of a function. 回答1: In general, Matlab's vectorization works over fixed-size arrays

问题 I am looking to trigger a while loop, but only after the user selects an option. For some reason now, it is automatically blowing through the entire block of code even before the user picks an option. How can I force it to wait to continue until a user selects something? case R.id.buttonSetPlayers: //**********************// //***SET PLAYER COUNT***// //**********************// AlertDialog.Builder builderPC = new AlertDialog.Builder(this); final CharSequence[] playerCount = {"1", "2", "3", "4

问题 I am looking to trigger a while loop, but only after the user selects an option. For some reason now, it is automatically blowing through the entire block of code even before the user picks an option. How can I force it to wait to continue until a user selects something? case R.id.buttonSetPlayers: //**********************// //***SET PLAYER COUNT***// //**********************// AlertDialog.Builder builderPC = new AlertDialog.Builder(this); final CharSequence[] playerCount = {"1", "2", "3", "4