It is a simple question, but what is the proper way to write an if statement in C that has 2 conditions?
For example:
if (input < 400 & input > 250){
some action...
}
Thanks!
Ok your question seems to be particularly unpopular...
just for info, have a look at http://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B
The operator you are looking for is && but I should not tell you this since in fact as downvotes testify... your question is a bit lazy!
I also know that sometimes when you are a noob it can be diffcult to find the correct terms for google.
good luck!
Related
I'm going through the code on a sample solution to my first Ruby Quiz (The Solitaire Cipher), and ran across this little nugget:
def move_down( index )
if index == #deck.length - 1
#deck[1..1] = #deck[index], #deck[1]
#deck.pop
else
...
end
end
The person who wrote this solution apparently used the multiple assignment in the second line to insert #deck[index] into the position before #deck[1]. Why not just use this?
#deck.insert(1, #deck[index])
Is there a difference?
OK, now I see what you mean. Sure, they will give the same result. I guess it just would be matter of choosing which style is more clear for you, or how you think your code would be easier to understand and in consequence more maintainable.
If your question is about which method is more "performant" I don't know that answer and I don't think it evens matters, as ruby is not meant to be performant but to be expressive.
loadModel() VS requestAction() VS constructClasses() .
what is the difference ?which is better and why?
which one is preferred in which circumstances and why?
Mark already answered your question in the comment..this is a very invalid question! The three methods do three completely different things.
Even if the methods were doing the same thing, your question would still not make any sense - better for what? What are you trying to accomplish? Without context, this is the same as asking "Which one is better, eating ice-cream or being a milkman?
I have question relating to implementation of arrays with Java+ANTLR combo. (I'm mainly talking about java/c style arrays).
So basically I'm asking how do you implement such feature, if there is such example already available or if someone could point me to anything that may point to solve it.
On other hand, I've searched a bit how would possible solution be. Main problem that I see
is that user may create arrays of various dimensions, even go crazy if he or she wants (like creating 5 dimension arrays or worse).
While grammar for something like this is fairly simple, like
new ID (INT (',' INT)* )
back end really gets involved a bit. As I said, user may input any number of dimensions, so array dimensions should be dynamically created. (at least as I see it, maybe I'm over complicating things?)
After searching I did found something that pretty much solves this problem perfectly, here is link to the question:
Is it possible to dynamically build a multi-dimensional array in Java?
Of course, my question is, is this viable example, it is a bit (to say at least), complicated? Is there more elegant solution to it?
Having that in mind, I was thinking maybe answer might be in the grounds of somehow transforming multidimensions
into more linear structure ? Could something like that be useful ? Simple search on stackoverflow pointed many solutions
to this, like:
Algorithm to convert a multi-dimensional array to a one-dimensional array
Would it be worth to search in that direction ?
Now, at the end, having in mind that arrays are really common feature in many languages, I must find it surprising that after searching ANTLR mailing list there is no similar question, which as I previously said leads me to believe that I'm maybe over complicating things ? (Unless I really suck at search?) I would really appreciate feedback.
Your syntax, if I'm not mistaken, corresponds to something like
new char 4,5,6,7
which is kind of strange. I expect that you really meant
new char[4,5,6,7]
However from a purely syntactic point of view, there's no reason not to just store the indices in an array and let the semantic analysis pass worry about it.
I've tried looking on google but i guess I can just not get the right search phrases to find what I want. If you are familiar with the afterNET IRC server, there is a command '.8' which is an 8 ball. It answers more than just yes/no questions tho. It gives you a variety of answers based on certain words you use in your question, like when, where, color, etc
I'd like to make something like this but have no idea where to start. I've recently studied DFA (Deterministic Finite Automata), is that where I should start? I understand I don't want to be scripting out every possible combination of words people use, but it would be nice to have a system that feels sorta realistic (like the 8ball program on the IRC server), and is expandable for more 'words' whenever I want.
Thanks for any help/links!
You may be giving most 8ball implementations more credit than they deserve. I think the point is that the questions are for yes/no answers, so the provided answers only have to cover a fairly predictable set of possibilities.
Most 8ball scripts that I am aware of (example) will just use an array and a random number to grab an answer.
Magic 8ball bots are very popular on irc as they are very easy to implement - simply respond to text with a given marker (in this case ".8") and respond with a random answer.
I have never heard of a magic 8ball using a deterministic approach, Cleverbot style. Actually, trying that, I'm not even sure how deterministic that is as most of the responses are also totally random and unrelated to what I was saying.
// our answers array
String[] answers = [ "yes", "no", "for sure", "unlikely", "most certainly", "definitely not" ];
public String ask8Ball() {
// rand returns a float between 0>=res>1, the (int) cast rounds down
int index = (int)(java.lang.Math.random() * 7);
return answers[index];
}
I discovered the "FizzBuzz" question today at coding horror. Great article. However, something in one of the user-comments confused me -- here's the quote:
Geez guys - EVERY ONE of you who gave
example code - EVERY ONE - hard coded
the FIZZ and BUZZ conditions...
It sounds to me like this poster is ridiculing people for "hard-coding" conditions, ie :
if(i % 3 == 0)
...
What is point the poster is trying to make? Is there another way to specify conditions in a program?
Thanks for taking the time!
Dan
the FIZZ and BUZZ conditions...
The point of Fizz Buzz is to quickly weed out non-programmers, not find the best programmer. Any reasonable function that meets the specification is acceptable for this test.
If you don't hardcode, great, you extra-pass. But, that doesn't get you out of the hard questions that are following. I usually increase the difficulty with each question, but I don't want to waste time if the candidate totally can't answer simple questions.
There's nothing wrong with hardcoding some conditions.
In the context of an interview, when I know that I'm coding FizzBuzz.java and not Enterprise Fizz Buzz with a database and 1000+ simultaneous users requiring five-nines uptime, it's ideal to hardcode these conditions.
Entry-level programmers, the ones you ask FizzBuzz at least, are to follow specifications and make solutions as simple and elegant as possible. If you're an agile software house, including such features goes against YAGNI and should be discouraged. If the interviewer doesn't ask the ability to use other factors besides three and five, then it wasn't in the spec and therefore isn't needed.
It's meant as a joke.