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Is there a similar syntax to Java's .hasNext() method in Ruby? I've been trying to get inputs in one line and then making it as integers and getting the absolute value.
It sounds like you want to see if there are more elements left in an iteration. Ruby's equivalent to that is peek:
From the docs:
Returns the next object in the enumerator, but doesn’t move the internal position forward. If the position is already at the end, StopIteration is raised.
But, in Ruby we usually rely on each or map to walk an iterable collection. There's no "figuring out" whether there's another element remaining, because Ruby does that for us.
ansh0l is right, gets is the most likely equivalent to hasNext() assuming that you're reading from the keyboard or any other I/O stream.
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I recently started coding with Apex and have been utilizing the 'system.debug()' method. It helps me keep track of variables in my code by printing the variable in the 'debug log'. Now I am studying Java, and I was wondering if an equivalent method exists in Java. I would like to see what my variables are in certain parts of my code.
You can use a PrintStream, like System.out to call print or println in order to display your debug. You can also redirect System.out to file using setOut.
However, if you use an IDE and a debugger, you can create a breakpoint to the line that you wish to debug and let a debugger run until it reaches your line.
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I have a list that I made with a type I created of . I want to sort it in lexicographical order. I have seen the compareTo in Java, am I supposed to use this? I'm not sure how to put it into the lexographical format from a list? Can anyone show me an example? I have seen many examples, but I am not sure how to do it from a list.
Just use implement the Comparable<Type> in your own Type class and implement the compareTo method to match the lexicographical order. Than just call Collections.sort(yourlistOfTypes).
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I'm trying to implement an stack using a linked list in Java, But I'm not sure which methods I have to implement(stack is a simple example here), How can I somehow get the methods and then extend my linked list class to implement my own class of stack
I know that somehow I have to use some kind of interface but it would be a great help if someone could guide me here.
A stack at its simplest just has Push() and Pop(). They map directly to the LinkedList methods push and pop already present!
So in order to implement a stack on top of a linked list you need to do....nothing :)
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where each node has a pointer to a sibling and a child.
Say that every node is either True or False, and you want to find the first node that is True (first means the shallowest).
How would you solve this? You are given the node to the head of the tree
can solve in java/c++.
As a hint, if you want to find the shallowest node in a tree with some property, you can use breadth-first search starting from the root.
The tree representation shouldn't be too much of an issue here, since when doing a BFS you would want to insert all of a node's children into the queue. The only difference between the normal representation and this representation is how you find the children.
I'll leave all the details to you, including doing the research to learn what these basic terms and definitions are, as an exercise. Your question is clearly some form of assignment or interview question and it would be terribly dishonest of me to just give you code.
Hope this helps!
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I have just come across a string variable in my application code where the value is assigned as follows
String YEAR="${year}";
What does the value of the String variable here?
Without being interpolated, just ${year}.
I can almost guarantee that String is going to be interpolated elsewhere in the code.
Maven, for example, uses this syntax to inject variable values into it's configuration settings.
Use an IDE such as IntelliJ and do a find usage on this variable. An extended find (search/find in path) may also yield results.
As others here have suggested, It is most likely being interpolated somewhere else.