Nodejs String Sub String subStrings()

Method Source Code

// 3. substrings//from  w  w  w  . ja  v a  2  s.  c o m

//Write a method substrings that will take a String and return an array containing each of its substrings.
// Don't repeat substrings. Example output: substrings("cat") => ["c", "ca", "cat", "a", "at", "t"].

String.prototype.subStrings = function(){
  const substringArray = [];

  for (var i = 0; i < this.length; i++){
    for (var j = i; j < this.length; j++){
      let substring = this.slice(i,j+1);
      if (!substringArray.includes(substring)){
        substringArray.push(substring);
      }
    }
  }
  return substringArray;
}

console.log("abc".subStrings());

Related

1. subStringCounter(searchString)

   var text = 'this is  test test test we in are is';
   String.prototype.subStringCounter = function (searchString) {
       var position = 0,
           counter = 0;
       searchString = searchString.toLowerCase();
       while (this.indexOf(searchString, position) >= 0) {
           counter += 1;
           position = this.toLowerCase().indexOf(searchString, position) + 1;
       return counter;
   };
   console.log(text.subStringCounter('in'));
   console.log(text.subStringCounter('we'));
   

2. 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;
   };
   ...
   

3. subStrings()

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

4. subStrings()

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

5. subStrings()

   String.prototype.subStrings = function () {
     result = [];
     for (var beginning = 0; beginning < this.length; beginning++) {
       for (var end = beginning + 1; end < this.length + 1; end++) {
         result.push(this.slice(beginning, end));
     return result
   var a = "cat";
   var b = a.subStrings();
   console.log(b);
   

6. subStrs()

   String.prototype.subStrs = function() {
     var output = [];
     for( var i = 0; i < this.length; i++ ) {
       for( var j = 0; j <= this.length; j++ ) {
         if(i < j) {
           output.push(this.substring(i,j));
       };
     };
   ...
   

7. subst(replacements)

   String.prototype.subst = function(replacements) {
       return this.replace(/%[A-Z][A-Z0-9_]+%/g, function (placeholder) {
           return placeholder in replacements ? replacements[placeholder] : placeholder;
       });
   };
   

8. subst(replacements)

   String.prototype.subst = function (replacements) {
       "use strict";
       return this.replace(/%[A-Z][A-Z0-9_]+%/g, function (placeholder) {
           return placeholder in replacements ? replacements[placeholder] : placeholder;
       });
   };
   

9. substitute(object, regexp)

   String.prototype.substitute = function(object, regexp){
     return String(this).replace(regexp || (/\\?\{([^{}]+)\}/g), function(match, name){
       if (match.charAt(0) == '\\') return match.slice(1);
       return (object[name] !== null) ? object[name] : '';
     });
   };