Nodejs Array Find findIdx(fn)

Method Source Code

/**/*from ww  w .  j  av  a2  s . co m*/
 * Function finds index value for array condition.
 */
Array.prototype.findIdx = function(fn) {
    return this.indexOf(this.filter(val => fn(val))[0]);
};

Related

1. findElements(config)

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

2. 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]; 
   };
   

3. findFirst(fun)

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

4. findFirst(test)

   Array.prototype.findFirst = function (test) {
       var i, item;
       for (i = 0; i < this.length; i++) {
     item = this[i];
     if (test(item)) {
         return item;
   };
   ...
   

5. 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);
   ...
   

6. findIfNotError(filter)

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

7. 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;
   };
   ...
   

8. findMaximumfindIt()

   var array = [47, 98, 0, -23, 4, 87.3, 0.0003, +9];
   Array.prototype.findMaximum = function findIt() {
   var arrayValue = 0;
   for(var i = 0; i < array.length; i++) {
     if (array[i] > arrayValue) {
       arrayValue = array[i];
     return arrayValue;
   ...
   

9. findRanges()

   Array.prototype.findRanges = function() {
     var buckets = {};
     for(var i = 0; i < this.length; i++) {
       if(!(this[i] in buckets)) {
         buckets[this[i]] = [{
           from: i,
           to: i
         }]
       } else {
   ...