Nodejs String Contains contains(string)

Method Source Code

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

Related

1. contains(str, ignoreCase)

   String.prototype.contains = function(str, ignoreCase) {
       return (ignoreCase ? this.toUpperCase() : this)
               .indexOf(ignoreCase ? str.toUpperCase() : str) >= 0;
   };
   String.prototype.startsWith = function(str) {
       return this.indexOf(str) == 0;
   };
   

2. contains(str, index)

   String.prototype.contains = function(str, index) {
     return (this.indexOf(str, index) !== -1) ? true : false;
   

3. contains(str,startIndex)

   String.prototype.contains = function(str,startIndex) {
       return -1 !== String.prototype.indexOf.call(this,str,startIndex);
   };
   

4. contains(strPattern)

   String.prototype.contains = function(strPattern){
     if(typeof strPattern !== 'string') return false;
     var pattern = new RegExp(strPattern, "i");
     return pattern.test(this);
   console.log("teste".contains("teste"));
   

5. contains(string)

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

6. contains(string, index)

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

7. contains(string, index)

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

8. contains(stringSet)

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

9. contains(strings, index)

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