C＃提取单词

Question

i have following piece of code with me iam spliting the words using only one space and the output is

output:

when 
ambition
ends
happiness
begins

But i want split the words after two spaces i mean my output should be like this:

when ambition
ends happiness
begins

string vj = "when ambiton ends happiness begins";
List<string> k = new List<string>();
char ch = ' ';
string[] arr = vj.Split(ch);
foreach (string r in arr)
{
  Response.Write(r + "<br/>");
}

Answer 1

As this is marked homework, I will give a hint:

• Keep a counter for how many spaces you do want in each line
• Reset this counter when number of spaces is reached
• When number of spaces is reached, add a line break

Answer 2

Here's a solution with regular expressions:

// Loosely: a word, followed by another word if available
Regex regex = new Regex(@"\S+( \S+)?"); 

string[] splits = regex.Matches(inputText)
                       .Cast<Match>()
                       .Select(match => match.Value)
                       .ToArray();

Answer 3

像现在一样拆分它，然后循环生成的数组，并使用标准的for循环将它们连接在一起。

Answer 4

You're gonna have to go manual on this one, searching for the space-character in the string, and keeping a counter. You'll have to remember the indices of the space-characters you'll want to split from, and use the .Substring(startindex, length) method for extracting the separate parts.

Answer 5

1. Create a variable containing start position of words to extract
2. Create a space counter
3. Loop through char by char (using an indexer)
4. When the number of spaces equals two, call substring method from position saved in #1 to current index.
5. Change variable from #1 to the current index.

Answer 6

string vj = "when ambiton ends happiness begins";
List<string> k = new List<string>();
char ch = ' ';
string[] arr = vj.Split(ch);
bool flag=false;

foreach (string r in arr)
{
 if(flag)
    {
    Response.Write(r + "<br/>");
    flag=false;
    }
 else
    { 
    Response.Write(r + " ");
    flag=true;
    }
}

The above is good for the case you specified (skipping a single space).

---

Though not necessary, but if you want it all wrapped up, Here :

string myString = "when ambiton ends happiness begins";

bool flag=false;

foreach (string item in myString.Split(ch))
         Response.Write(item + flag=!flag?" ":"<br/>");

Answer 7

You can just add a bool indicating whether or not you should add "/br", call it breakLine.
Now at each iteration check if it's true - if so add "/br", otherwise don't. finally negate it at each iteration.
Implementation is left as an exercise (-: