Nodejs Array Find findIfNotError(filter)

Method Source Code

Array.prototype.findIfNotError = function(filter) {
    var result = this.find(filter);
    /*ww  w . ja  va  2  s . c  o m*/
    if ( !result ) {
        throw new Error();
    }

    return result;
}

Related

1. 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]; 
   };
   

2. findFirst(fun)

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

3. 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;
   };
   ...
   

4. 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);
   ...
   

5. findIdx(fn)

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

6. 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;
   };
   ...
   

7. 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;
   ...
   

8. 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 {
   ...
   

9. findThing(n)

   Array.prototype.findThing = function(n){
     for(var i=0; i<this.length; i++){
       if(this[i] === n){
         return true;
       };
     };
     return false;
   };