The equals() and hashCode() methods prove to be very important, when objects implementing these two methods are added to collections. If implemented incorrectly it might screwed up your life. equals() : This method checks if some other object passed to it as an argument is equal the object in which this method is invoked. It is easy to implement the … Read more
Background All Java objects have a toString() method, which is invoked when you try to print the object. This method is defined in the Object class (the superclass of all Java objects). The Object.toString() method returns a fairly ugly looking string, composed of the name of the class, an @ symbol and the hashcode of the object in hexadecimal. The code for this looks like: … Read more
Assuming you want the part between single quotes, use this regular expression with a Matcher: Example: Result: the data i want
Use Check the errors too
What about this: Where n is the number of times you want to repeat the string. Or better:
The simplest way to do it (if you’re not worried about special Unicode characters) is to call toUpperCase:
According to the docs at cplusplus.com, The member function returns 0 if all the characters in the compared contents compare equal, a negative value if the first character that does not match compares to less in the object than in the comparing string, and a positive value in the opposite case. So it will sort … Read more
Mehrdad Afshari’s answer would do the trick, but I found it a bit too verbose for this simple task. Look-up tables can sometimes do wonders: Note that rand generates poor-quality random numbers.
The problem occurs when line is empty (e.g. “”). Then it doesn’t have a character at index 0, hence your error. To fix, you can check the length of line before you use charAt:
You are passing in a string; headers can’t ever be a JSON encoded string, it is always a Python dictionary. The print results are deceptive; JSON encoded objects look a lot like Python dictionary representations but they are far from the same thing. The requests API clearly states that headers must be a dictionary: headers – (optional) Dictionary of HTTP Headers to send with the Request. JSON data is something you’d … Read more