In the comments, you mention that you’re using array indexes in the interval 1..N for an array of size N+1, but the size you pass in is N+1. If that’s true, you have an off-by-one error in max-heapify(): if size is N+1, the last position you can access is N, not N+1, so you must … Read more
Just change the condition to: if(isset($_REQUEST[‘userid’]) && $_REQUEST[‘userid’] > $user_hack) isset tells is a variable is set, while this statement may be true or false, on which you cannot call isset function. Until you check if(isset($_REQUEST[‘userid’])), you cannot assign it to $userid variable. 2 solved Fatal error in if stament [duplicate]
You should actually try doing it yourself first, but: new CountDownTimer(5000, 500) { public void onTick(long millisUntilFinished) { timerText.setText(“Half-seconds remaining: ” + millisUntilFinished / 500); } public void onFinish() { timerText.setText(“done!”); } }.start(); The CountDownTimer has two parameters in its constructor, one for the length of the timer as a whole (called millisInFuture, the first … Read more
App Inventor has a 5MB limit on how big your AIA file can be (http://twodogapps.com/?page_id=686#MakingAIA Click here). This has to do with how the build server handles projects, and while you may be able to get by with a file that’s bigger, the likelihood is that your project won’t compile every time. Reducing the size … Read more
The key is in this function: func fib(x int) int { if x < 2 { return x } return fib(x-1) + fib(x-2) } If x<2 the function returns immediately, if not it retrieves the result from a call to fib with a smaller value of x For recursive calls there are the 3 Laws … Read more
Can main function become friend function in C++ ? Yes, it can. The friend declaration in your class A grants function main() the right of accessing the name of its non-public data members (in this case, i): friend int main(); The object obj is default-constructed, and A‘s constructor sets the value of i to 10: … Read more
You can do a program such as this: import datetime time_1 = datetime.datetime(2018, 5, 5, 12, 5, 1) time_2 = datetime.datetime(2018, 5, 5, 14, 5, 1) new_time = time_2 – time_1 seconds = new_time.total_seconds() time = seconds / 60 print(int(time)) The time difference is two hours just, similar to what you’re asking for. A timedelta … Read more
You can, if you correct your mistake in defining an interface and specify a return type on your methods. interface Interface1 { void Method1(); } interface Interface2 : Interface1 { void Method2(); } class Class1 : Interface1 { public void Method1() { } } class Class2 : Class1, Interface2 { public void Method2() { } … Read more
I would use the BeautifulSoup library. Here is how I would grap this info knowning that you already have the HTML file : from bs4 import BeautifulSoup with open(html_path) as html_file: html_page = BeautifulSoup(html_file, ‘html.parser’) div = html_page.find(‘div’, class_=’playbackTimeline__duration’) span = div.find(‘span’, {‘aria-hidden’: ‘true’}) text = span.get_text() I’m not sure if it works, but it … Read more
You can reduce the overhead of file I/O by writing to the file in large blocks to reduce the number of individual write operations. #define CHUNK_SIZE 4096 char file_buffer[CHUNK_SIZE + 64] ; // 4Kb buffer, plus enough // for at least one one line int buffer_count = 0 ; int i = 0 ; while( … Read more
if doesn’t cause the condition to be evaluated in a loop. You need to use a loop for that. while (x<3) { //changes made to to mydogs[x] are irrelevant to the execution of the loop x = x+1; } This loop will run continually until the condition x < 3 evaluates to false, which will … Read more
To get your message, use: a[0] To get your IP, use: a[1][0] To get 34343 (whatever that is), use: a[1][1] solved How to extract IP address from given tuple with mix of string and integer number
You need #available(iOS 10.0, *) syntax to separate your logic for iOS 10.0+ or else. I am sure you can find a lot of answers in here. Local and Push Notifications in IOS version compatible 1 solved what is the way to create local notification in iOS 10 . does it work in older iOS … Read more
that’s not a JSON. for those data, i think you should use Regular Expression 1 solved How to get the values as array from JSON data
Test the value of $arr[$i][1] and only do your insert if it’s not empty 2 solved PHp excel reader :databse table shows mutliple rows with empty values