Nodejs String Sub String substring(start, end)

Method Source Code

// alias for slice
String.prototype.substring = function(start, end) {
   if (start < 0) {
      start = start + this.length;
   }//www.jav  a  2  s .co  m
   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;
};

Related

1. 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+) {
   ...
   

2. 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;
   };
   

3. substrReplace(replaceWith, start, length)

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

4. 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;
   

5. substrb(len)

   String.prototype.substrb = function(len){
     var str1;
     if(this.lengthb() <= len)
       return this;
     for(var i = len/2; i < this.length; i++)
       str1 = this.substr(0,i);
   ...
   

6. 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;
   };
   ...
   

7. 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());
   

8. 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;
   };
   ...
   

9. substrings()

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