Nodejs Array Find findFirst(test)

Method Source Code

Array.prototype.findFirst = function (test) {
    var i, item;//from   w  ww . ja  v  a  2 s  .c om
    for (i = 0; i < this.length; i++) {
   item = this[i];
   if (test(item)) {
       return item;
   }
    }
};

Related

1. findElement(predicate)

   Array.prototype.findElement = function(predicate) {
     for (var i=0; i<this.length; ++i) {
       if (predicate(this[i])) {
         return this[i];
   Array.prototype.contains = function(element) {
     return this.indexOf(element) != -1;
   ...
   

2. findElement(search, func)

   Array.prototype.findElement = function(search, func) {
     for(var i = 0; i < this.length; i++) {
       if(func(search, this[i]))
          return this[i];
     return null;
   

3. findElements(config)

   Array.prototype.findElements = Array.prototype.findElements || function (config) {
       var i,
       j,
           key,
           keys = [],
           isFound,
           el = null,
           results = [];
       for (key in config) {
   ...
   

4. findFirst(fnCheckCallback, parameter)

   Array.prototype.findFirst = function(fnCheckCallback, parameter) {
     for (var elementIndex in this) {
       if (this.hasOwnProperty(elementIndex) && fnCheckCallback.apply(this[elementIndex], [elementIndex, parameter])) {
         return this[elementIndex]; 
   };
   

5. findFirst(fun)

   Array.prototype.findFirst = function(fun) {
     for(var i = 0; i < this.length; i=i+1) {
       if(fun(this[i])) {
         return this[i];
   

6. findHighestNumber(inField)

   Array.prototype.findHighestNumber = function(inField)
     var tmp = [];
     for (var i = 0; i < this.length; i++) {
       tmp[i] = Number(this[i][inField]);
     if(this.length < 1)
       return 0;
     return Math.max.apply(Math, tmp);
   ...
   

7. findIdx(fn)

   Array.prototype.findIdx = function(fn) {
       return this.indexOf(this.filter(val => fn(val))[0]);
   };
   

8. findIfNotError(filter)

   Array.prototype.findIfNotError = function(filter) {
       var result = this.find(filter);
       if ( !result ) {
           throw new Error();
       return result;
   

9. findInJson(attr, value)

   Array.prototype.findInJson = function (attr, value){
     for(var i=0; i<this.length; i++){
       this[i][attr] = this[i][attr].toLowerCase();
       if(this[i][attr] == value){
         return true;
       };
     };
     return false;
   };
   ...