I have a string which is a sentence or two long (more than one word). In that sentence there will be a hash-tagged word e.g. #word. This needs to be replaced with *word*.
If the sentence is:
Today the weather is very nice #sun
It should become:
Today the weather is very nice *sun*
How would I go about doing this?
You could do a regular expression, like this:
var output = Regex.Replace(input, @"#(\w+)", "*$1*");
\b at the end of the pattern?\b ensures the pattern ends in a word boundary.You can try this
string text = "Today the weather is very nice #sun";
int startindex = text.Indexof('#');
int endindex = text.IndexOf(" ", startIndex);
text = text.Replace(text.substring(startIndex, 1), "*")
text = text.Replace(text.substring(endindex, 1), "*")
Try this:
string theTag = "sun";
string theWord = "sun";
string tag = String.Format("#{0}", theTag);
string word = String.Format("*{0}*", theWord);
string myString = "Today the weather is very nice #sun";
myString = myString.Replace(tag, word);
No fancy functions or libraries just common sense and solves your problem. It supports as many hashed words as you would like.
To demonstrate how it works I have created 1 TextBox and 1 Button in a c# form but you could use this code in console or pretty much anything.
string output = ""; bool hash = false;
foreach (char y in textBox1.Text)
{
if(!hash) //checks if 'hash' mode activated
if (y != '#') output += y; //if not # proceed as normal
else { output += '*'; hash = true; } //replaces # with *
else if (y != ' ') output += y; // when hash mode activated check for space
else { output += "* "; hash = false; } // add a * before the space
} if (hash) output += '*'; // this is needed in case the hashed word ends the sentence
MessageBox.Show(output);
and behold
Today the weather is very nice #sun
becomes
Today the weather is very nice *sun*
here is the same code but in method form for you to pop right in your code
public string HashToAst(string sentence)
{
string output = ""; bool hash = false;
foreach (char y in sentence)
{
if (!hash)
if (y != '#') output += y;
else { output += '*'; hash = true; } // you can change the # to anything you like here
else if (y != ' ') output += y;
else { output += "* "; hash = false; } // you can change the * to something else if you want
} if (hash) output += '*'; // and here also
return output;
}
to demonstrate how you could modify this below is a customizable version
public string BlankToBlank(string sentence,char search,char highlight)
{
string output = ""; bool hash = false;
foreach (char y in sentence)
{
if (!hash)
if (y != search) output += y;
else { output += highlight; hash = true; }
else if (y != ' ') output += y;
else { output += highlight+" "; hash = false; }
} if (hash) output += highlight;
return output;
}
So the search would search for the character before the word and the highlight char will surround the word. Word being defined as characters until it reaches a space or the end of the string.
