Nodejs String Sub String substrb(len)

Method Source Code

String.prototype.substrb = function(len){
   var str1;/*from w  w w.ja va2s  .c  o  m*/
   if(this.lengthb() <= len)
   {
      return this;
   }
   for(var i = len/2; i < this.length; i++)
   {
      str1 = this.substr(0,i);
      if(str1.lengthb() == len)
      {
         return str1;
      }
      else if(str1.lengthb() > len)
      {
         return this.substr(0, i - 1);
      }
      else 
      {
         if(str1.lengthb() == len-1)
         {
            return str1;
         }
      }
   }
};

Related

1. substr(begin, end)

   String.prototype.substr = function(begin, end) {
     if (end === null) { end = this.length;           }
     if (begin <  0)   { begin = this.length + begin; }
     if (end <= 0)     { end = this.length + end;     }
     if (begin < 1)    { begin = end - 1/begin;       }
     if (end < 1)      { end = begin + 1/end;         }
     return this.substring(begin, end);
   

2. substr(start, length)

   String.prototype.substr = function(start, length) {
     if (start < 0) {
       start = start + this.length;
     if (!length) {
       length = this.length - start;
     var s = "";
     for (var i = start, len = this.length; i < start + length && i < len; i+) {
   ...
   

3. substrCount(needle)

   String.prototype.substrCount = function(needle){
     var cnt = 0;
     for (var i=0;i<this.length;i++) {
     if (needle == this.substr(i,needle.length))
       cnt++;
     return cnt;
   };
   

4. substrReplace(replaceWith, start, length)

   String.prototype.substrReplace = function(replaceWith, start, length){
     return this.replace(this.substring(start, (start+length)), replaceWith );
   };
   

5. substrWoR(c)

   String.prototype.substrWoR = function(c){
     var n=1,o=0;
     while(o!=n){
       s=this.substr(0,c+(o=n)-1);
       n=s.split("\r").length;
     return s;
   

6. substring(start, end)

   String.prototype.substring = function(start, end) {
     if (start < 0) {
       start = start + this.length;
     if (!end) {
       end = this.length;
     } else if (end < 0) {
       end = end + this.length;
     var s = "";
     for (var i = start, len = this.length; i < end && i < len; i++) {
       s += this[i];
     return s;
   };
   

7. substrings()

   String.prototype.substrings = function () {
     subs = [];
     for(var i = 0; i < this.length; i++) {
       for( var j = i+1; j < this.length+1; j++) {
         subs.push(this.slice(i,j));
       };
     };
     return subs;
   };
   ...
   

8. substrings()

   String.prototype.substrings = function(){
     var substrings = []
     for (var i=0; i<this.length; i++){
       for (var j=i+1; j<=this.length; j++){
         substrings.push(this.slice(i,j));
     return substrings;
   var str = 'cat';
   console.log(str.substrings());
   

9. substrings()

   String.prototype.substrings = function () {
     var substrings = [];
     for (var start = 0; start < this.length; start++) {
       for (var len = 1; (start + len) <= this.length; len++) {
         substrings.push(this.slice(start, start + len));
     return substrings;
   };
   ...