Nodejs String Truncate trunc(n)

Method Source Code

////from   w  w  w  . jav  a2 s .  c om
// Truncate string to length n using word boundary.
//
String.prototype.trunc = function(n) {
  var longStr = this.length > n;
  var str     = longStr ? this.slice(0, n) : this;

  longStr ? str = str.slice(0, str.lastIndexOf(' ')) : str;

  return longStr ? str + '...' : str;
}

Related

1. trunc(length, options)

   String.prototype.trunc = function(length, options) {
       var defaults = Ext.Object.merge({omission: "..."}, options || {});
       var stop = length - defaults.omission.length;
       return (this.length > length ? this.substring(0, stop) + defaults.omission : this).toString();
   };
   

2. trunc(n)

   String.prototype.trunc = function(n) {
     'use strict';
     return this.length > n ? this.substr(0, n-1) + '...' : this;
   };
   

3. trunc(n)

   String.prototype.trunc = String.prototype.trunc ||
         function(n){
             return (this.length > n) ? this.substr(0,n-1)+'…' : this;
         };
   

4. trunc(n)

   String.prototype.trunc = function(n) {
     return this.substr(0,n-1)+(this.length>n?'...':'');
   };
   

5. trunc(n)

   String.prototype.trunc = function(n){
      var isTooLong = this.length > n;
      var string = isTooLong ? this.substr(0,n) : this;
      string = isTooLong ? string.substr(0, string.lastIndexOf(' ')) : string;
      return  isTooLong ? string + '...' : string;
   };
   

6. trunc(n)

   String.prototype.trunc = String.prototype.trunc || function(n){
       return this.length>n ? this.substr(0, n-1) + '...' : this;
   };
   function inArray(needle, haystack) {
       var length = haystack.length;
       for(var i = 0; i < length; i++) {
           if(haystack[i] == needle) return true;
       return false;
   ...
   

7. trunc(n)

   String.prototype.trunc = String.prototype.trunc || function(n){
       return this.length>n ? this.substr(0, n-1) + '...' : this;
   };
   function inArray(needle, haystack) {
       var length = haystack.length;
       for(var i = 0; i < length; i++) {
           if(haystack[i] == needle) return true;
       return false;
   ...
   

8. trunc(n,useWordBoundary)

   String.prototype.trunc = function(n,useWordBoundary){
     var toLong = this.length>n,
     s_ = toLong ? this.substr(0,n-1) : this;
     s_ = useWordBoundary && toLong ? s_.substr(0,s_.lastIndexOf(' ')) : s_;
     return toLong ? s_ : s_;
   };
   

9. trunc(n,useWordBoundary)

   String.prototype.trunc = function(n,useWordBoundary) {
       var toLong = this.length>n ,
       s_ = toLong ? this.substr(0,n-1) : this;
       s_ = useWordBoundary && toLong ? s_.substr(0,s_.lastIndexOf(' ')) : s_;
       return  toLong ? s_ + '…' : s_;
   };
   String.prototype.startsWith = function (str){
       return this.slice(0, str.length) == str;
   };
   ...