Nodejs String Contains containsAll(strings, index)

Method Source Code

String.prototype.containsAll = function(strings, index) {
   if(!Array.isArray(strings)) throw Error('1 argument is not an array');
   return strings.every(string => this.includes(string, index), this);
}

// This should most likely be longer, but I need help improving it. Not sure how to

Related

1. contains(term)

   String.prototype.contains = function(term){
     return this.indexOf(term) > -1;
   };
   

2. contains(text)

   String.prototype.contains = function (text) {
       return this.toLowerCase().indexOf(text.toLowerCase()) !== -1;
   };
   

3. contains(token, ignoreCase)

   String.prototype.contains = function(token, ignoreCase) {
     var _reg = 0, str = this.toString(), i;
     if(str && typeof token === "string") {
       if(ignoreCase === true) {
         token = token.toLowerCase();
         str = str.toLowerCase();
       while((i = str.indexOf(token)) !== -1) {
         str = str.substring(i + token.length);
   ...
   

4. contains(txt)

   String.prototype.contains = function(txt)
       return (this.indexOf(txt) >= 0);
   

5. contains(value)

   String.prototype.contains = function (value) {
       "use strict";
       var containsValue = false;
       if (this.indexOf(value) >= 0) {
           containsValue = true;
       return containsValue;
   };
   

6. contains(substring)

   String.prototype.contains = function contains(substring) {
     return this.indexOf(substring) !== -1;
   };
   

7. contains(value)

   String.prototype.contains = function contains(value){
     return this.indexOf(value) !== -1;
   };
   

8. onlyContains(stringSet)

   String.prototype.onlyContains = function(stringSet) {
      for (var i=0;i<this.length;i++) {
         var currentChar = this[i];
         if (!stringSet.contains(currentChar))
            return false;
      return true;
   };
   

9. shuffle(container)

   String.prototype.shuffle = function(container){
     var str = this,
       progress = str.length - 2,
       timer = setInterval(function() {
         container.text(str.substring(0, progress++));
         if (progress > str.length) clearInterval(timer);
       }, 80);