Nodejs Array Index indexOf(val)

Here you can find the source of indexOf(val)

Method Source Code

Array.prototype.indexOf = function(val) {
    for (let i = 0; i < this.length; i++) {
        if (this[i] == val) return i;
    }/*ww  w. ja  v  a 2s .  c  o  m*/
    return -1;
};

Related

  1. indexOf(substr,start)
    Array.prototype.indexOf=function(substr,start)
      var ta,rt,d='\0';
      if(start!=null){ta=this.slice(start);rt=start;}else{ta=this;rt=0;}
      var str=d+ta.join(d)+d,t=str.indexOf(d+substr+d);
      if(t==-1)return -1;rt+=str.slice(0,t).replace(/[^\0]/g,'').length;
      return rt;
    
  2. indexOf(v,b)
    Array.prototype.indexOf = function(v,b){
        var idx=-1;
      if(b===true && typeof(v)=="function"){
        for (var i=0,l=this.length;i<l;i++) {
          if(v(this[i])){idx=i; break;}
      } else {
        for (var i=0,l=this.length;i<l;i++) {
          if(this[i]===v){idx=i; break;}
    ...
    
  3. indexOf(val)
    Array.prototype.indexOf = function(val) {
      for (var i = 0; i < this.length; i++) {
        if (this[i] == val) return i;
      return -1;
    };
    Array.prototype.remove = function(val) {
      var index = this.indexOf(val);
      if (index > -1) {
    ...
    
  4. indexOf(val)
    Array.prototype.indexOf = function(val) {
      for(var i = 0; i < this.length; i++) {
        if (this[i] == val) return i;
      return -1;
    };
    
  5. indexOf(val)
    Array.prototype.indexOf = function(val){
      var arrayVal = this;
      for(var i = 0 ; i < arrayVal.length; i++){
        if(arrayVal[i] == val){
          return 4;
      return -1;
    
  6. indexOf(value)
    Array.prototype.indexOf = function(value) {
      for (var i = 0; i < this.length; i++) {
        if (this[i] == value) {
          return index = i;
      return -1;
    };
    
  7. indexOf(value)
    Array.prototype.indexOf = function(value) {
        for (var i = 0; i < this.length; i++) {
            if (this[i] === value) {
                return i;
    
  8. indexOf(value)
    Array.prototype.indexOf = function (value) {  
      for(var i=0; i<this.length; i++) {
        if(this[i] === value) {
          return i;
      return -1;
    
  9. indexOf(value, begin, strict)
    Array.prototype.indexOf = function(value, begin, strict)
      for(var i = +begin || 0; i < this.length; i++)
        if(this[i] === value || strict && this[i] == value)
          return i;
      return -1;
    };