Nodejs String Contains contains(t)

Method Source Code

/* Prototype facilitators */
String.prototype.contains = function (t) {
    return this.indexOf(t) != -1;
};

Related

1. contains(subString)

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

2. contains(substr)

   String.prototype.contains = function(substr)
     return this.indexOf(substr) > -1;
   

3. contains(substring)

   String.prototype.contains = function(substring) {
     return !!this.match(new RegExp(substring, 'i'));
   

4. contains(substring)

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

5. contains(substring, ignoreCase)

   String.prototype.contains = function(substring, ignoreCase) {
     var lowerSubString = substring.toLowerCase(),
     lowerThis = this.toLowerCase();
     if (ignoreCase) {
       return lowerThis.indexOf(lowerSubString) > -1;
     } else {
       return this.indexOf(substring) > -1;
   

6. contains(term)

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

7. contains(text)

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

8. 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);
   ...
   

9. contains(txt)

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