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  4. how can i write functions in String class without using any tools?

how can i write functions in String class without using any tools?

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  • H hammerstein05

    Is that not a built-in class or prepared method? Forgive me, but this does sound like a school assignment.

    S Offline
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    Sajjad Izadi
    wrote on last edited by
    #6

    yes, our professor is wanted us to write a program like that and he told us that we can get help from everyone we want. and i'm getting help from you :).

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    • S Sajjad Izadi

      how can i make my string to char[] without using any built-in classes or prepared methods, += and = or 'foreach' in C#? in an other expression, i want to (have to) write trim, insert, concat, countOf(char c) and etc without using any of methods or classes or foreach and even += or + in C#. how is that? please help, thanks.

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      Christian Graus
      wrote on last edited by
      #7

      I don't see how you can do it without =, but a string is an array of chars, and if you use a for loop instead of foreach, you can get each char by index, as in myString[0]

      Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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      • S Sajjad Izadi

        yes, our professor is wanted us to write a program like that and he told us that we can get help from everyone we want. and i'm getting help from you :).

        H Offline
        H Offline
        hammerstein05
        wrote on last edited by
        #8

        You'll need to do some coding of your own, and then ask for specific help when you get stuck. You can't just come in here and ask for the code. that's not how it works. The forums aren't for you to get your solution done for you. And you'll find that in most of the forums available.

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        • S Sajjad Izadi

          excuse me, but as i said, i haven't too use any prepared method for that.

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          leppie
          wrote on last edited by
          #9

          If you cant use any methods on it, then the string is opaque to you, and there is no way you can do anything with it. I think you read your assignment wrong. Try again.

          xacc.ide - now with TabsToSpaces support
          IronScheme - 1.0 alpha 4a out now (29 May 2008)

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          • S Sajjad Izadi

            how can i make my string to char[] without using any built-in classes or prepared methods, += and = or 'foreach' in C#? in an other expression, i want to (have to) write trim, insert, concat, countOf(char c) and etc without using any of methods or classes or foreach and even += or + in C#. how is that? please help, thanks.

            P Offline
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            Paul Conrad
            wrote on last edited by
            #10

            Is there a reason why you are wanting to reinvent the wheel?

            "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

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            • S Sajjad Izadi

              how can i make my string to char[] without using any built-in classes or prepared methods, += and = or 'foreach' in C#? in an other expression, i want to (have to) write trim, insert, concat, countOf(char c) and etc without using any of methods or classes or foreach and even += or + in C#. how is that? please help, thanks.

              D Offline
              D Offline
              Dave Kreskowiak
              wrote on last edited by
              #11

              Cute. Considering that String IS a class under .NET, that kind of makes the assignment contradictory to itself, now doesn't it?

              A guide to posting questions on CodeProject[^]
              Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
                   2006, 2007, 2008

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              • C Christian Graus

                I don't see how you can do it without =, but a string is an array of chars, and if you use a for loop instead of foreach, you can get each char by index, as in myString[0]

                Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

                S Offline
                S Offline
                Sajjad Izadi
                wrote on last edited by
                #12

                excuse me, but i haven't to use indexes, too.

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                • S Sajjad Izadi

                  excuse me, but i haven't to use indexes, too.

                  C Offline
                  C Offline
                  Christian Graus
                  wrote on last edited by
                  #13

                  Then I suspect your teacher is a moron. An index is the only way to get those chars out of the string.

                  Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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                  • P Paul Conrad

                    Is there a reason why you are wanting to reinvent the wheel?

                    "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                    S Offline
                    S Offline
                    Sajjad Izadi
                    wrote on last edited by
                    #14

                    no but it's my homework :) and i have to write that till next two days!

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                    • S Sajjad Izadi

                      excuse me, but i haven't to use indexes, too.

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                      Pete OHanlon
                      wrote on last edited by
                      #15

                      So - are you meant to use telepathy? Your professor has effectively ruled out all useful constructs.

                      Deja View - the feeling that you've seen this post before.

                      My blog | My articles

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                      • P Paul Conrad

                        Is there a reason why you are wanting to reinvent the wheel?

                        "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                        C Offline
                        C Offline
                        Christian Graus
                        wrote on last edited by
                        #16

                        Yeah, it's homework. I don't have a problem with trying to point him in the right direction, he was up front about it and he's not asking for a solution. It sounds messy tho.

                        Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

                        P 1 Reply Last reply
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                        • D Dave Kreskowiak

                          Cute. Considering that String IS a class under .NET, that kind of makes the assignment contradictory to itself, now doesn't it?

                          A guide to posting questions on CodeProject[^]
                          Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
                               2006, 2007, 2008

                          C Offline
                          C Offline
                          Christian Graus
                          wrote on last edited by
                          #17

                          I think either the teacher is an idiot, or the OP is wrong in his understanding

                          Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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                          • S Sajjad Izadi

                            no but it's my homework :) and i have to write that till next two days!

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                            Paul Conrad
                            wrote on last edited by
                            #18

                            Sajjad Izadi wrote:

                            have to write that till next two days

                            Better get going then.

                            "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

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                            • C Christian Graus

                              Yeah, it's homework. I don't have a problem with trying to point him in the right direction, he was up front about it and he's not asking for a solution. It sounds messy tho.

                              Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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                              Paul Conrad
                              wrote on last edited by
                              #19

                              Christian Graus wrote:

                              It sounds messy tho.

                              Gearing him up for real world maintenance projects, I suppose.

                              "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

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                              • C Christian Graus

                                I think either the teacher is an idiot, or the OP is wrong in his understanding

                                Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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                                Paul Conrad
                                wrote on last edited by
                                #20

                                Christian Graus wrote:

                                the teacher is an idiot

                                Might be a safe bet. I don't even subject my CS students to worthless crap assignments. Assignments I push on them have some real meaning to them.

                                "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

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                                • P Paul Conrad

                                  Sajjad Izadi wrote:

                                  have to write that till next two days

                                  Better get going then.

                                  "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                                  C Offline
                                  C Offline
                                  Christian Graus
                                  wrote on last edited by
                                  #21

                                  I think you need to re-read the assignment. You seem to be saying 'turn a string into a byte array without using any methods on the string class that would give you access to the contents of the string'.

                                  Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

                                  P 1 Reply Last reply
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                                  • P Paul Conrad

                                    Christian Graus wrote:

                                    It sounds messy tho.

                                    Gearing him up for real world maintenance projects, I suppose.

                                    "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                                    C Offline
                                    C Offline
                                    Christian Graus
                                    wrote on last edited by
                                    #22

                                    *grin*

                                    Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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                                    • P Paul Conrad

                                      Christian Graus wrote:

                                      the teacher is an idiot

                                      Might be a safe bet. I don't even subject my CS students to worthless crap assignments. Assignments I push on them have some real meaning to them.

                                      "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                                      C Offline
                                      C Offline
                                      Christian Graus
                                      wrote on last edited by
                                      #23

                                      Yeah, they should be learning things they can use, although I am always for students writing a list class that they will never use, for example.

                                      Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

                                      P 1 Reply Last reply
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                                      • C Christian Graus

                                        I think you need to re-read the assignment. You seem to be saying 'turn a string into a byte array without using any methods on the string class that would give you access to the contents of the string'.

                                        Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

                                        P Offline
                                        P Offline
                                        Paul Conrad
                                        wrote on last edited by
                                        #24

                                        Didn't you mean to direct this to Sajjad? I'm not the one doing the assignment :-\

                                        "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

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                                        • P Pete OHanlon

                                          So - are you meant to use telepathy? Your professor has effectively ruled out all useful constructs.

                                          Deja View - the feeling that you've seen this post before.

                                          My blog | My articles

                                          C Offline
                                          C Offline
                                          Christian Graus
                                          wrote on last edited by
                                          #25

                                          I usually suggest prayer when people ask stuff like this.

                                          Christian Graus Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

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