Nodejs String Contains contains(str, ignoreCase)

Method Source Code

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;
};

Related

1. contains(str)

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

2. contains(str)

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

3. contains(str)

   String.prototype.contains = function(str){
     var filters = str.toLowerCase().split(/[ ,_\-]+/);
     var tokens = this.toLowerCase().split(/[ ,\-]+/);
     for (var i = 0; i < filters.length; i++) {
       var match = false;
       for (var j = 0; j < tokens.length; j++) {
         if (tokens[j].startsWith(filters[i])) {
           match = true;
           break;
   ...
   

4. contains(str)

   String.prototype.contains = function (str) {
       return this.indexOf(str) > -1;
   };
   String.prototype.startsWith = function (str) {
       return this.indexOf(str) == 0;
   };
   String.prototype.endsWith = function (str) {
       return this.indexOf(str) > -1 && (this.indexOf(str) + str.length) == this.length;
   };
   ...
   

5. contains(str)

   String.prototype.contains = function(str) {
     return this.indexOf(str) > -1;
   };
   String.prototype.endsWith = function(suffix) {
     return this.indexOf(suffix, this.length - suffix.length) !== -1;
   };
   

6. contains(str, index)

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

7. contains(str,startIndex)

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

8. 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"));
   

9. contains(string)

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