Newbie Coders Chat

Solution here:
http://pastebin.com/YTga7pAg

Thanks 571, well the good news is that i got something like 17 out of 22 for that submission, so it was really bang on.

I have had another look at the next one, and done some thinking about it. Also the final deadline for all of the work has been put back til the 17th of this month. You really are a life saver.

Here is the next piece of code which i need help with. We need to change it, so that it takes the string sentance, and string word, and removes the word from the sentance, here is the code so far anyway. See what you think thanks!

John
** @author your_name*/ public class RemoveIt { //TODO: instantiate class variables String sentence; /** @param sentence String to manipulate */ public RemoveIt(String sentence) { //TODO: constructor definition this.sentence = "A kittycat is at the door"; String RemoveIt = sentence } i need to remove the word "cat" from the argument?? /** @param toRemove String to remove from sentence * @return manipulated String */ public String remove(String phrase) { //TODO: remove definition } }

Here are the other assignments i have:
A class called GiveChange is provided below. The design of this class is to take a decimal amount from the user representing the change due to them from a purchase, and return the number of quarters, dimes, nickels and pennies that should be given to the user to make that total.The main method has been defined for you, and utilizes four static methods: getQuarters, getDimes, getNickels, and getPennies. Each method takes the total change in pennies (i.e., $3.80 = 380 pennies). As the denomination gets smaller, additional parameters are added to represent the number of quarters, dimes and nickels that minimize the change returned.Write the method definitions for getQuarters, getDimes, getNickels, and getPennies.

/* author your_name*/import java.util.Scanner;public class GiveChange { /** param p number of pennies * return number of quarters */ public static int getQuarters(int p) { //TODO: method definition for getQuarters } /** param p number of pennies * param q number of quarters * return number of dimes */ public static int getDimes(int p, int q) { //TODO: method definition for getDimes } /** param p number of pennies * param q number of quarters * param d number of dimes * return number of nickels */ public static int getNickels(int p, int q, int d) { //TODO: method definition for getNickels } /** param p number of pennies * param q number of quarters * param d number of dimes * param n number of nickels * return number of leftover pennies */ public static int getPennies(int p, int q, int d, int n) { //TODO: method definition for getPennies } public static void main(String[] args) { Scanner s = new Scanner(System.in); System.out.println("How much change is to be given?"; double change = s.nextDouble(); int pennies = (int)(change * 100); int q = getQuarters(pennies); int d = getDimes(pennies, q); int n = getNickels(pennies, q, d); int p = getPennies(pennies, q, d, n); String str = String.format("The customer should recieve %d " + "quarters, %d dimes, %d nickels, " + "and %d pennies.", q, d, n, p); System.out.println(str); }

Thanks 571, well the good news is that i got something like 17 out of 22 for that submission, so it was really bang on.

I have had another look at the next one, and done some thinking about it. Also the final deadline for all of the work has been put back til the 17th of this month. You really are a life saver.

Here is the next piece of code which i need help with. We need to change it, so that it takes the string sentance, and string word, and removes the word from the sentance, here is the code so far anyway. See what you think thanks!

John
** @author your_name*/ public class RemoveIt { //TODO: instantiate class variables String sentence; /** @param sentence String to manipulate */ public RemoveIt(String sentence) { //TODO: constructor definition this.sentence = "A kittycat is at the door"; String RemoveIt = sentence } i need to remove the word "cat" from the argument?? /** @param toRemove String to remove from sentence * @return manipulated String */ public String remove(String phrase) { //TODO: remove definition } }

Solution for RemoveIt below:
http://pastebin.com/AhfqrmjR

Tip: whenever they mention class variable, that means they want you to put the keyword static in front of your variable, like I did in the solution code.

Note: Please post your code in pastebin in the future because TSR doesn't
format it properly.

Thanks for helping me with those last programs 571, we got top marks for them!

May I know the specific marks?

Also i am not sure if i want to carry on to do the second module. Would you still be able to help me as you have been doing, if i do decide to do this? But even still i have a new job starting up in a couple of weeks, and there is also a psychology mooc i have signed up to, so without your help i just won't be able to do it? What do you think 571?

Well, John, like you, I have many things to do in my life as well, so here is my suggestion: I'll help you out if I have the time. Until now, the coding has been easy enough to do in a couple of minutes (well, except for the GiveChange one, that took me 24 hours because I suck at math).

The question is, John, if you are learning any valuable lessons from the code I write up. I have the feeling you just accept my solutions and post them, which would not be very beneficial for your learning process.
It's important to learn something new every time and to add that to your knowledge and skill set to be able to do something with it.
Please tell me if you are learning from my code because it's important for now and for your future endeavors

Make sure you read a Java book, you'll help yourself a lot!

Yes I am learning from it, but maybe not as much as i should. Plus it is kind of like cheating, and i don't want to make a habit of it, so i guess i will call it a day after this one. Thanks for the help anyway!

In school, providing solutions is called 'cheating', in the real world, it's called 'collaboration'.

You know you look like eminem?

That's not me, that's Eminem, his name is Marshall Mathers. That image is a screenshot from his video 'Role Model'.

fix:
1) The console.log() statement needs to be terminated by closing parentheses and a semicolon
2) The "food" string cannot have a quote because it's not a literal string in this case, but a passed-in argument


console.log("I want to eat " + " " + food);


technical explanation:
otherwise the Javascript engine will interpret everything after that line as a statement, which }; is not, which is why the error reads: "invalid or unexpected token" (Javascript divides commands into separate tokens).

Incase you wanted to know even more exciting stuff about JS functions - Javascript has a few different ways of declaring a function.
function orangeCost(arg){
}

orangeCost(5);
Is the most common way. That is called a function declaration. You've declared a function named orangeCost and are calling it passing '5' as the parameter.
var orangeCost = function(cost) {
console.log(cost * 5);
};
orangeCost("5"
The way you did it is called a 'function expression' which lets you declare a function as part of an expression - It is often used when you want to pass functions around as arguments.
You will often see code like
http.get("SomeUrl",function(){
//do some stuff on success
},function(){
//do some stuff on failior
};
Notice those functions don't have names that is because function expressions can be anonymous!

One thing to watch out for with function expressions is where you position them.
doStuff();
var doStuff = function(){};
That code is invalid because doStuff() doesnt exist at the point it is called.
doStuff();
function doStuff(){
}
Is valid because 'function' declarations are 'hoisted ' to the top by javascript whilst function expressions are not.