Beginners question

[Andy Hoe]

Hello, I'm new to C# and I am having a small problem. All I want to do is
take a sentence from the user then replace certain words with other ones.
So I started off with this:

string myString = Console.ReadLin e();
string editString;
editString = myString.Replac e("is", "isn't");
Console.WriteLi ne(editString);

Which if I entered "This is a test" I got back "Thisn't isn't a test"
I got round this by looking for the word to replace by putting spaces round
the string:

string myString = Console.ReadLin e();
string editString;
editString = myString.Replac e(" is ", " isn't ");
Console.WriteLi ne(editString);

Which was fine for this example, but what if there is punctuation involved?
what if I wanted to convert "This is." it wouldn't pick it up because of the
full stop. Would it be best to do it a different way by stripping all the
punctuation out somehow? but then how would you put it back in? is there a
simple way of doing this?
Thanks for any help,
Andy

[AlexS]

Re: Beginners question

Take a look at Regex.Replace and regular expressions.
HTH
Alex

"Andy Hoe" <andyhoeBLAH@ds l.pipexBLAH.com BLAH> wrote in message
news:3fa16c0f$0 $5648$cc9e4d1f@ news.dial.pipex .com...[color=blue]
> Hello, I'm new to C# and I am having a small problem. All I want to do is
> take a sentence from the user then replace certain words with other ones.
> So I started off with this:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e("is", "isn't");
> Console.WriteLi ne(editString);
>
> Which if I entered "This is a test" I got back "Thisn't isn't a test"
> I got round this by looking for the word to replace by putting spaces[/color]
round[color=blue]
> the string:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e(" is ", " isn't ");
> Console.WriteLi ne(editString);
>
> Which was fine for this example, but what if there is punctuation[/color]
involved?[color=blue]
> what if I wanted to convert "This is." it wouldn't pick it up because of[/color]
the[color=blue]
> full stop. Would it be best to do it a different way by stripping all the
> punctuation out somehow? but then how would you put it back in? is there a
> simple way of doing this?
> Thanks for any help,
> Andy
>
>[/color]

[100]

Re: Beginners question

Hi Andy,

Take a look on *Regex* class and regular expressions

HTH
B\rgds
100

"Andy Hoe" <andyhoeBLAH@ds l.pipexBLAH.com BLAH> wrote in message
news:3fa16c0f$0 $5648$cc9e4d1f@ news.dial.pipex .com...[color=blue]
> Hello, I'm new to C# and I am having a small problem. All I want to do is
> take a sentence from the user then replace certain words with other ones.
> So I started off with this:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e("is", "isn't");
> Console.WriteLi ne(editString);
>
> Which if I entered "This is a test" I got back "Thisn't isn't a test"
> I got round this by looking for the word to replace by putting spaces[/color]
round[color=blue]
> the string:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e(" is ", " isn't ");
> Console.WriteLi ne(editString);
>
> Which was fine for this example, but what if there is punctuation[/color]
involved?[color=blue]
> what if I wanted to convert "This is." it wouldn't pick it up because of[/color]
the[color=blue]
> full stop. Would it be best to do it a different way by stripping all the
> punctuation out somehow? but then how would you put it back in? is there a
> simple way of doing this?
> Thanks for any help,
> Andy
>
>[/color]

[Jhon]

Re: Beginners question

Hi,

Regular expressions have a zero-width assertation \b. This specifies that
the match must occur on a word boundary.

using System.Text.Reg ularExpressions ;
[color=blue]
> string myString = Console.ReadLin e();
> string editString;[/color]
editString = Regex.Replace (myString,"\\bi s","isn't");[color=blue]
> Console.WriteLi ne(editString);[/color]


HTH
greetings


"Andy Hoe" <andyhoeBLAH@ds l.pipexBLAH.com BLAH> wrote in message
news:3fa16c0f$0 $5648$cc9e4d1f@ news.dial.pipex .com...[color=blue]
> Hello, I'm new to C# and I am having a small problem. All I want to do is
> take a sentence from the user then replace certain words with other ones.
> So I started off with this:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e("is", "isn't");
> Console.WriteLi ne(editString);
>
> Which if I entered "This is a test" I got back "Thisn't isn't a test"
> I got round this by looking for the word to replace by putting spaces[/color]
round[color=blue]
> the string:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e(" is ", " isn't ");
> Console.WriteLi ne(editString);
>
> Which was fine for this example, but what if there is punctuation[/color]
involved?[color=blue]
> what if I wanted to convert "This is." it wouldn't pick it up because of[/color]
the[color=blue]
> full stop. Would it be best to do it a different way by stripping all the
> punctuation out somehow? but then how would you put it back in? is there a
> simple way of doing this?
> Thanks for any help,
> Andy
>
>[/color]

[Carol Sun]

Re: Beginners question

Why don't you say
editString = myString.Replac e (" is", " isn't");

"Andy Hoe" <andyhoeBLAH@ds l.pipexBLAH.com BLAH> wrote in message news:<3fa16c0f$ 0$5648$cc9e4d1f @news.dial.pipe x.com>...[color=blue]
> Hello, I'm new to C# and I am having a small problem. All I want to do is
> take a sentence from the user then replace certain words with other ones.
> So I started off with this:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e("is", "isn't");
> Console.WriteLi ne(editString);
>
> Which if I entered "This is a test" I got back "Thisn't isn't a test"
> I got round this by looking for the word to replace by putting spaces round
> the string:
>
> string myString = Console.ReadLin e();
> string editString;
> editString = myString.Replac e(" is ", " isn't ");
> Console.WriteLi ne(editString);
>
> Which was fine for this example, but what if there is punctuation involved?
> what if I wanted to convert "This is." it wouldn't pick it up because of the
> full stop. Would it be best to do it a different way by stripping all the
> punctuation out somehow? but then how would you put it back in? is there a
> simple way of doing this?
> Thanks for any help,
> Andy[/color]

[Jon Skeet [C# MVP]]

Re: Beginners question

Carol Sun <apry08@hotmail .com> wrote:[color=blue]
> Why don't you say
> editString = myString.Replac e (" is", " isn't");[/color]

That has the same problem with other words:

"This is an issue that needs resolving" would become
"This isn't an isn'tsue that needs resolving"

--
Jon Skeet - <skeet@pobox.co m>

http://www.pobox.com/~skeet

If replying to the group, please do not mail me too