In this case: i, a[i] = i + 1, i The righthand side evaluates to a tuple (1, 0). This tuple is then unpacked to i and then a[i]. a[i] is evaluated during the unpacking, not before, so corresponds to a[1]. Since the righthand side is evaluated before any unpacking takes place, referring to a[i] … Read more
If you are looking for the solution of this question yet, how about this? I measured the number of concurrent connections for Web Apps using the fetchAll method which can work the asynchronous processing. The flow is as follows. Deploy Web Apps. Connect to Web Apps by the asynchronous processing. At that time, the number … Read more
Sounds like a session blocking issue By default PHP writes its session data to a file. When you initiate a session with session_start() it opens the file for writing and locks it to prevent concurrent edits. That means that for each request going through a PHP script using a session has to wait for the … Read more
& between two commands simply results in executing both commands independent on result of first command. The command right of & is executed after command left of & finished independent on success or error of the previous command, i.e. independent on exit / return value of previous command. && results in a conditional execution of … Read more