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Trim spaces from start and end

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  1. //   ------------------------
  2. //   Remove space from the
  3. //   beginning and the end
  4. //   of a string
  5. //   ------------------------
  6. String.prototype.trim = function()
  7. {
  8.    var j, strlen, k;
  9.    //   -----------
  10.    //   From Begin
  11.    //   -----------
  12.    strlen = this.length
  13.    j = 0;
  14.    while (this.charAt(j) == " ")
  15.    {
  16.       j++
  17.    } 
  18.    if(j)
  19.    {
  20.       this = substring(this,j+1, strlen)
  21.       if(j == strlen) return this;
  22.    }
  23.    //   -------------
  24.    //   From the end
  25.    //   -------------
  26.    var k = this.length - 1;
  27.    while(this.charAt(k) == " ")
  28.    {
  29.       k--
  30.    }
  31.    this = substring(this,1,k+1)
  32.    return this;
  33. }
  34.  
  35. //   -------------------------------
  36. //   USAGE:
  37. //   The trim() function will not
  38. //   replace the original string
  39. //   a new trim string will be
  40. //   returned
  41. //   -------------------------------
  42. stringa = " This is a test text    ";
  43. trace("original : '" + stringa + "' (len: " + stringa.length + ")");
  44. //   create a new variables 
  45. trimString = stringa.trim();
  46. trace("trim string : '" + trimString + "' (len: " + trimString.length + ")");

URL: www.sephiroth.it/proto_detail.php?id=15

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