Nodejs String Truncate truncate(options)

Method Source Code

String.prototype.truncate = function (options) {
  var length = (options && options.length) || 70;
  var ending = (options && options.ending) || "...";
  var truncated = this.slice(0, length);

  if (truncated.length < this.length)
    truncated += ending;//from  ww  w.  j a  va2s.  co m

  return truncated;
};

Related

1. truncate(max_len, appender)

   'use strict';
   String.prototype.truncate = function(max_len, appender) {
     max_len  = max_len || 80;
     appender = appender || '...';
     if (appender.length >= max_len) {
       throw Error('appender length is greater or equal to max_len');
     if (this.length <= max_len) {
       return this;
   ...
   

2. truncate(maxlength)

   String.prototype.truncate = function (maxlength) {
       if (!this) {
           return '';
       if (!maxlength) {
           maxlength = 20;
       return (this.length > maxlength) ? this.slice(0, maxlength - 3) + '...' : this;
   };
   ...
   

3. truncate(n)

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

4. truncate(n)

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

5. truncate(options)

   String.prototype.truncate = function (options) {
     var length = (options && options.length) || 50;
     var ending = (options && options.ending) || "...";
     var truncated = this.slice(0, length);
     if (truncated.length < this.length)
       truncated += ending;
     return truncated;
   };
   

6. truncate(x)

   String.prototype.truncate = function(x){
     return this.length > x ? this.substr(0,x) : this ;
   

7. truncate(x)

   String.prototype.truncate = function(x){
     if(this.length < x) return this.valueOf();
     else return this.substring(0, x - 3) + "...";
   };
   

8. truncateFilename()

   String.prototype.truncateFilename = function() {
       var fileParts = this.split('.');
       var extension = fileParts[fileParts.length-1];
       var filename = this.substr(0, this.length - extension.length + 1);
       return filename.substr(0, 10) + '*.' + extension;
   };
   

9. truncateString(str, num)

   function truncateString(str, num) {
     if (str.length <= num) {
       return str;
     } else {
       return str.slice(0, num > 3 ? num - 3 : num) + '...';
   truncateString("A-", 1);