getPosition is non-const in the interface class, but const in your derived class. These are two different functions and cause your problem. Adding the override keyword in the implementation class (if your compiler supports it) will flag this sort of problem. 0 solved C++ cannot instantiate abstract class
You can get CustomerMapping by cardId using JPQL. A more optimal solution will be to use projections. public String getCustomerMappingCustomerId(String cardId) { getEntityManager(); CustomerMapping result = first(em.createQuery( “select c from CustomerMapping c where c.cardId = :cardId”) .setParameter(“cardId”, cardId).getResultList()); return result == null ? null : result.getCustomerId(); } private static <T> T first(List<T> items) { return … Read more
You’re accessing outside the vector. When you get to the last iteration of the for loop in bubbleSort(), numbers[i] is the last element of the vector, and numbers[i+1] is outside. This results in undefined behavior, and in your case it happens to access the -1 that you initially put in the vector and then popped … Read more
Try with following code: <script> $(document).ready(function(){ $(“[id^=tolevel_]”).click(function(){ var currentID = $(this).attr(“id”); var number = currentID.replace(“tolevel_”,””);//get the number in string format number = parseInt(number); var i = number -1; $(“#level_” + i).hide(500,’swing’, function(){ $(“#level_” +(i+1)).show(500, ‘swing’, function(){ }); }); }); $(“[id^=backtolevel_]”).click(function(){ var currentID = $(this).attr(“id”); var number = currentID.replace(“backtolevel_”,””);//get the number in string format number = … Read more
I’ll go over your points one by one: Declare long presult; right before the try statement. This makes the compiler mad because it wrongly thinks there’s a possibility of returning an unintialized variable. Actually, the compiler correctly determines that there is the possibility of returning an uninitialized variable. Since the variable is only set if … Read more
a VM is a virtual machine. In simple words, it is virtual hardware(emulator) to run your virtual devices. from Wikipedia: In computing, a virtual machine (VM) is an emulation of a particular computer system. Virtual machines operate based on the computer architecture and functions of a real or hypothetical computer, and their implementations may involve … Read more
C++ error: Reference to non-static member function must be called, Please help, don’t know whats literally wrong [closed] solved C++ error: Reference to non-static member function must be called, Please help, don’t know whats literally wrong [closed]
I don’t know Node.js but in javascript it can be done using split() var content = “Hello \n bob \n ben je op deze \n world \n bobert”, content_array = content.split(“\n”); content_array.forEach(function(entry) { document.write(“<content>’+entry+'</content><br />”); }); 1 solved javascript finding a string in a string
The Comparable interface is used to compare two objects and their order. As per the Javadocs, the compareTo method should return 0 if the two objects are equal, any negative number if this object is “smaller” than the specified other, and any positive number if this object is “larger” than the specified other. What “smaller” … Read more
Parse the hour with Time#strptime hour = 4 Time.strptime(“#{hour}”, “%H”) => 2015-11-02 04:00:00 +0000 And then parse with Time#strftime if you’re interested in the formatting. Time.strptime(“#{hour}”, “%H”).strftime(“%H:%M”) => “04:00” solved How to parse time given an hours [closed]
Consider: print “hello world” The above statement is OK when you are using Python 2.x, because in Python 2.x, print is a statement. But in Python 3.x, print is a function and there is no way to turn it back into a statement. So you must use parentheses. So for Python 3.x, the answer is: … Read more
The lines if(Character.isWhitespace(ch)) { spaces++; } else{ if(spaces>=1) { spaces=0; fos.write(‘ ‘); fos.write(ch);} in your code ensures you condense all whitespace characters into a single space. A newline is considered a whitespace character so you skip those as well. If you don’t want to group the newline with the other whitespace in this case a … Read more
It can be achieved with the following regex: ^[^a-z'”*&<>\/]+$ See demo It allows any letter that is not ‘”*’&<>\/, and requires that there is no lowercase English letter. ^ – Start of string [^a-z'”*&<>\/]+ – 1 or more characters other than ‘, “, *, &, <, >, / or lowercase English character. $ – End … Read more
If you have read it carefully it clearly says that it will be released later this year. So you will find no repository yet Open Source Later this year Swift will be released as open source. Swift’s unique combination of elegance, power, and safety has the opportunity to move the entire software industry forward. It … Read more
Organizing elements of a web page into columns can actually be quite difficult. Two common solutions to the problem are using bootstrap and flexbox. I use Bootstrap because I am already familiar with it, its sort of the holygrail of HTML/CSS/JS frameworks. Your gonna need to learn some basic familiarity with bootstrap before understanding and … Read more